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Amateur Work Magazine Vol4



A Monthly Magazine Of The Useful Arts And Sciences, containing illustrated articles descriptive of electrical and mechanical apparatus, furniture and other useful articles, games, photography, model making, boat building, etc

TitleAmateur Work Magazine Vol4
AuthorMiscellaneous
PublisherDraper Publishing Company
Year1905
Copyright1905, Draper Publishing Company
AmazonAmateur Work: A Monthly Magazine Of The Useful Arts And Sciences
-A Sensitive Galvanometer
R. G. Griswold In measurements of resistance by means of the Wheatstone bridge, to be described later, it is essential that the galvanometer used should be very sensitive, so that it may detect eit...
-Notes On Wireless Telegraphy. II. Transmitting Instruments of a Wireless Telegraph Station
L. T. KNIGHT The transmitting instruments of a wireless station comprises the induction coil, interrupter and primary battery, a key for sending, the Leyden jar battery, adjustable spark gap and a ...
-A 50-Watt Dynamo
R. G. Griswold Although the majority of dynamos and motors of very recent design are of circular yoke type with radial poles, the Manchester type of field magnet has many points of merit, particula...
-Telephone Circuits And Wiring. VI. Central Station Systems
ARTHUR H. BELL Believing that amateurs who have followed this series of articles, and have made experiments in connection with them, would like to become familiar with the rudiments of practical te...
-Pattern Making For Amateurs. IX. A Hollow Tray. Using Loose Pieces With Pattern
F. W. PUTNAM The next pattern to be described is for a hollow tray. Large trays of the same style are frequently used on machines for holding tools and are then known as tool trays. Fig. 55 shows t...
-A Sideboard
John F. Adams While the illustration of the sideboard here shown may give one the impression that it is a very plain piece of furniture, it will be found by anyone making it that the design and gen...
-How To Make Photo Trays
W. S. Standiford The amateur photographer, at the beginning of his experience with the camera, usually has an idea that a costly outfit of trays for developing, toning and fixing, is necessary for ...
-Introduction 1
The increase in Manual Training instruction is very encouraging in some sections of this country, while in others such instruction is sadly neglected. Those who are familiar with the practical benefit...
-Books Received 1
Care and Handling of Electric Plants. Norman H. Schneider. Spon & Chamberlain, New York. 6 1/2x4 1/2 in. 100 pp. Flexible leather leather covers, $1.00. . This manual is intended as a handbook of p...
-A Gasolene Touring Car. I. The Gear Case
R. G. GRISWOLD The design of a car printed in the September issue is, in many respects, very difficult for the amateur, if not almost prohibitive. There are many parts that could hardly be handled ...
-A Gasolene Touring Car. I. The Gear Case. Continued
The holes for the various bolts are then laid off on the finished surface of the upper half and drilled from the inside, with the piece resting on its feet. This half is then used as a jig and is laid...
-Twist Drills. Their Uses And Abuses
By Courtesy of the Cleveland Twist Drill Company. Next to a drill being properly made and tempered, it is of the utmost importance that its cutting edges be properly ground to get the maximum resul...
-Tool Making For Amateurs
Robert Gibson Griswold IV. Lathe Tools and Their Cutting Action. The essential requirements for lathe tools, especially those used for general work, are hardness of cutting edge combined with a ...
-Tool Making For Amateurs. Continued
In Fig. 9 is shown the top view or plan of a diamond point tool working into a cut. This tool is given both top and side rake as shown in Fig. 10, which is a view looking along the stock f...
-Elementary Mechanics. X. Compressed Air
J. A. Coolidge Gases and liquids, because of their similarity in some respects, are called fluids. They are carried in vessels of any shape, have no difficulty in adapting themselves to the form of...
-Elementary Mechanics. X. Compressed Air. Continued
A. COOLIDGE Fig. 35 represents a student lamp chimney which may be procured at a grocer's or hardware store, with a piston P just large enough to move easily in the tube. The piston may be cut out ...
-A Simple Rheostat
Henry C. Wall Quite frequently the strength of battery current in use on a given piece of electrical apparatus has to be varied or regulated to meet certain conditions. Unless the amateur possesses...
-100watt Transformer
R. G. Griswold. The transformer described in this article is intended for amateur construction and amateur experimentation. The materials are such that they may be readily obtained, and the entire ...
-Notes On Wireless Telegraphy. III. Receiving Instruments of a Wireless Telegraph Station
L. T. KNIGHT The receiving set of a wireless station comprises the coherer, the relay, the decoherer, the sounder, the weak current and strong current batteries, coherer condenser and the tuning co...
-Electric Lighting Of Christmas Trees
Frederick A. Draper The greater safety attending the lighting of Christmas trees by electricity makes this method far preferable to that of the familiar candles, with the possibility of igniting th...
-Telephone Circuits And Wiring. VII Central Station Systems
ARTHUR H. BELL In the last chapter was described the subscribers' drop and jack wiring. An illustration is here shown of another form of key for the cord circuit which has decided advantages over t...
-Electric Capacity
John E. Atkins There is a property inherent in electrical circuits which plays an important part in the amount of current. This property is called capacity. All conductors will absorb and hold a ce...
-Pattern Making For Amateurs. X. A Small Jack. A Small Hand Wheel
F. W. PUTNAM Fig. 61 shows the castings and Fig. 62 the pattern for a small jack requiring a balanced horizontal core. A split pattern is used, and is turned in the same manner as the pattern for t...
-Easily Made Furniture. A Sewing Table
John F. Adams The sewing-table here described will be found a convenient receptacle for the numerous odds and ends required for the household repairing and dressmaking. It is of light construction ...
-A Mantel Clock
The design here given for an old Dutch mante clock is suitable for making up for a Christmas present, and on that account will undoubtedly be welcomed at this time. The movement for which the dimensio...
-A Clothes Tree
A very convenient piece of furniture is easily made, and any one in need of it will welcome it as a holiday gift, even if the maker is also the recipient. The post is 4 ft. 6 in. long and 2 1/4...
-Photography. Christmas Suggestions
A brief resume of what can be easily and quickly done in a photographic way for making up attractive Christmas gifts, will, it is hoped, be of interest to those who, having a camera, have not as yet p...
-Introduction 2
The interest shown in magic-lantern work by many of our readers leads us to propose the following plan for an exchange of lantern slides: Any subscriber may send their name and address and a list givi...
-A Gasolene Touring Car. II. Eight Inch Expanding Clutch
R. G. GRISWOLD The object of a friction clutch is to provide a ready means of throwing a machine or other mechanical device either into or out of engagement with the source of power. The requiremen...
-How To Read A Micrometer
By Courtesy of The L. S. Starrett Company. The spindle C is attached to the thimble E at the point H. The part of the spindle which is concealed within the sleeve and thimble is threaded to fit a n...
-Our Opportunities
Abstracts from an address to the graduating class of Stevens Institute of Technology by Mr. Walter C. Kerr. We hear much about opportunities. They are everywhere plentiful. Remember, that your opp...
-Tool Making For Amateurs. V. Special Tools for Lathe Use
ROBERT GIBSON GRISWOLD There are many special forms of tools for lathe use, the designs of which had their origin in some particular difficulty experienced while using the common or straight tool. ...
-How To Build A Power Launch. I. Laying Out the Lines
CARL H. CLARK The launch to be described is of a type which has lately become very popular among users of launches. It is 21 ft. long, 5 ft. 8 in. wide, and draws about 2 ft. of water. It is a very...
-Small Flash Boiler
H. D Waterhouse Flash boilers are of very small size for the power which they are capable of generating. Their value is due to the very high working pressure, and the instantaneous generation of st...
-Simple Electro-Magnets
One of the first pieces of apparatus the amateur electrician desires to make is an electro-magnet. As some of the materials generally used are not obtainable except in the large cities, resort must be...
-Photography Notes
Production Of Duplicate Negatives To produce a negative of equal size from a negative, the Eder-Pizzi-ghelli formula is for the amateur probably the simplest. For this purpose an ordinary thin film...
-Science And Industry 1
The bituminous coal measures at Coleman, N. W. T., are of the largest size. In Pennsylvania the largest in the famous Connelsville mine is 6 feet thick, while one of the seams at Coleman is fully 18 f...
-A Doll House
The younger readers of Amateur Work who may be able to use woodworking tools fairly well, and it is assumed that all are in possession of the tools more commonly used, will find the making of the doll...
-Battery Lighting Outfit
Frederick A. Draper. A very common desire of amateurs interested in electricity is that of a small lighting outfit, with accumulators or storage battery as the source of current. Many have hesitate...
-Wireless Telegraphy Experiments
H. E. Dill The writer, not long ago, when experimenting with devices to gather in the waves at the receiving end of a wireless station, utilized the receiver and transmitter illustrated in the foll...
-The Leyden Jar
John E. Atkins When two sheets or plates of metal are arranged parallel to each other and but a small distance apart, and then connected with a source of direct electrical current, the plate connec...
-Voltmeter Measurements
Oscar F. Dame ' First of all, among electrical testing instruments, is the volt-meter, which, as the name implies, serves to measure the voltage or electromotive force of any source of electricity....
-Telephone Circuits And Wiring. VIII. Central Energy Systems
ARTHUR H. BELL One of the great difficulties with magneto circuits when telephone instruments are in constant use, is the exhaustion of the battery supply at each instrument. To improve these condi...
-Pattern Making For Amateurs. XL A Small Hand Wheel Requiring Three-part Flask
F. W. PUTNAM The next pattern to be taken up is that of a bevelled wheel suitable for a turn-table and is shown in Fig. 71. If we examine the top view of this figure we shall notice that the patter...
-A Small Desk
John F. Adams The design for the small desk here described is such that the construction is easy, and may be attempted with confidence by anyone having but ordinary skill in wood working. If care b...
-A Window Ventilator
John F. Adams The proper ventilation of the living and sleeping rooms of a residence during snowy or rainy weather, requires some arrangement which will permit the fresh air to enter and yet keep o...
-Photography. Choice Of A Developer
John Everard The amateur photographer, still on the threshold of our fascinating art-science, often finds himself in a predicament when necessity demands that he should purchase a fresh supply of d...
-Introduction 3
A new premium list is in preparation and wil probably be ready for distrubution to our readers with the February issue. It will include a large number of new premiums, which we are confident will be f...
-Tool Making For Amateurs. V. Set of Chucking Drills. Test Indicator
ROBERT GIBSON GRISWOLD Any amateur who has tried using a twist drill of large diameter in a small lathe has, perhaps, experienced a few of the difficulties attending that operation, especially when...
-Some Difficulties In Getting On
James Swinburne Abstracts from an address delivered to the students of the British Institute of Engineers. Each of us is confronted with the question: What is going to be my work? I say us, ...
-Some Difficulties In Getting On. Continued
In the charter of the Institution of Civil Engineers the engineer is defined as directing the great source of power in nature for the use and convenience of man. With all respect to this august bod...
-Zinc Engraving Or Etching
N. S. Tinker In presenting the following instructions for the rapid etching of zinc printing plates, it is the intention to make them as clear as possible, bo that even a novice can easily produce ...
-Vibrator For Induction Coils
H. C Burnham The difficulties encountered with vibrators of induction coils are, that the contacts are liable to fuse or burn, and that the core is not fully magnetized so that the full power of th...
-How To Build A Power Launch. II. Laying Out the Lines
CARL H. CLARK The keel is a straight piece of oak 3 in. thick, 5 in. wide and 17 ft. long. It should have a slight upward bend forward, to conform to the shape of the mould already made. The deadwo...
-Photography Notes #2
To one whose lot brings him in constant contact with beginners and their productious in the photographic line, nothing seems more of a hindrance to their advancement than their uniform inability to de...
-Elementary Mechanics. XI. Pumps
J. A. COOLIDGE In our last paper we studied barometers and siphons and learned that the air exerted such a force downward that a column of mercury 30 in. high would be held up in a barometer. If we...
-The Force Pump
Take a block of wood at least 3 in. square and with an extension bit [Such a bit may be had of Amateur Work for a reasonable price], bore a hole E2 in. diam eter 1 in. deep, with the same center, cont...
-A Microphone
A microphone is one of the most important and interesting electtrical instruments which the amateur who is interested in electricity can construct. And, although extremely sensitive in its action, it ...
-Science And Industry 2
In a paper read by Mr. F. S. Greene before the New England Cotton Manufacturers' Association, the claim is made that for power transmission in textile mills ropes are superior either to belting or ele...
-Trade Notes 1
The illustration shows the No. 3, belted stationary, 20-light outfit sold by the Richardson Engineering Co., Hartford, Conn. This is but one o the many combination or isolated electric lighting pl...
-Burglar Alarm Fitting
Robert N. Staples. It is commonly supposed that burglar alarms are expensive to install, are complicated in construction, and require a considerable amount of electrical experience to maintain. Not...
-Oil Stones
Harry Malone The oil stone is such a simple thing that one is liable to neglect it and not give it the attention which it should have, and yet for the patternmaker it fills a very important place. ...
-How To Build A Power Launch. III. Getting Out and Putting On the Planking
Carl H. Clark Great care must be taken that the frames do not change their shape after being bent into place. There is always a tendency for the frames to straighten out after a time, and this must...
-How To Build A Power Launch. Getting Out and Putting On the Planking. Continued
The lower edge of the planks must be planed fair and true, as it will be impossible to alter it after it is fastened in place. The plank may be fastened with the nails, as before; it must be pressed f...
-Tool Making For Amateurs. VI. Making a Set of Arbors
ROBERT GIBSON GRISWOLD The tool chest of any amateur that has any pretensions at all in the line of nice machine work is not complete without a set of lathe arbors, known by some as mandrels. It is...
-Kerosene Burners For Automobiles
I. Frazier Bard I have been experimenting on this line for the past three years. When I first took this subject up I was told by all the experts I asked for information on the subject, that it coul...
-A Gasoline Touring Car. III. Two Cylinder Air Cooled Engine
R. G. GRISWOLD As with every mechanism requiring a prime mover there exists a variety of motors that may be used for power purposes; in each class there also exists a number of types from which to ...
-A Library Settle
John F. Adams The settle here described, while more particularly suitable for the library, will also be found a very useful piece of furniture for sitting-room, den or hall. It is four feet long an...
-Introduction 4
That the readers of this magazine are interested in the forthcoming description of a small, easily constructed runabout, is abundantly shown by the large number of letters we have received in response...
-Ye Olden Time Music Stand
Thomas Lloyd This music stand is a very handy piece of furniture in the home where music predominates. On one side stands the instructor, on the other the pupil. It is preferably made of mahogany, ...
-Pattern Making For Amateurs. XII. A Small Hand Wheel
F. W. PUTNAM Fig. 76 shows a small hand wheel for a rapid-acting woodworker's vise, and Fig. 77 the pattern for same. It will be noticed that a hole | in. in diameter is to be bored through the hub...
-An Easily Made Am-Meter
Oscar N. Dame Every amateur should possess an accurate amater for measuring battery current and general laboratory test-ing. While the high grade instruments for sale by apparatus dealers are beyon...
-Notes On Wireless Teegraphy. IV. Course of the Transmitted Wave and Frequency
L. T. KNIGHT During the early experiments with telephone transmissions in the original installation between Boston and Providence, a distance of about 50 miles, an enormous battery supply was held ...
-Photography. Color Values
Harry L. Shepherd Recognizing the fact, from the school of experience, that practical information, for the busy amateur on the subject of ortho-chromatic photography is hard to find, I hope in this...
-Refinements Of Mechanical Science
Ambrose Swasey Abstract of the President's Address at the Dec. 1 904, Meeting at New York of the American Society of Mechanical Engineers. For the subject of my address I wish to speak of a few ...
-Refinements Of Mechanical Science. Continued
That such an arrangement has some elements favorable to the accurate measurements of time, there can be no donbt. It certainly has the element of simplicity, and notwithstanding its long service the o...
-Books Received 2
Cyclopedia of Applied Electricity. Various au thors. 5 Volumes. 2,200 pp. 2,000 illustrations, 9 1/4 X 6 1/4 in. Half Morocco, $30.00. [Introductory Price. $15.] American School of Correspondence, Chi...
-A Simple Electric Motor
Albert G. Warren The accompanying illustration shows a simple type of electro-motor suitable for driving small models, boats and cars or for rotating color discs. Under no circumstances must it be ...
-Correspondence 1
No. 85. So. NoRwalk, Conn., Jan. 23, '05. Will you kindly answer the following questions relative to the battery described in the July, '03, number of Amateur Work : 1. The diameter of the tin c...
-Trade Notes 2
The accompanying cut shows the 10 in. Star wood turning lathe of a new design which has just been placed on the market. This lathe is admirably suited for use in manual training schools, as it conta...
-The Amateur Runabout. I. General Design
Frederick A. Draper The design of the runabout to be described in this series of articles is as simple in construction as a serv-icable vehicle will permit, and the work will not be found difficult...
-Notes On Wireless Telegraphy. V. Peculiarities of Coherer Action
L. T. KNIGHT A question frequently propounded by beginners in wireless experiment work is that of how far wireless signals may be transmitted by a given spark. It is to be presumed that the writer ...
-A Gasoline Touring Car. IV. Two Cylinder Air Cooled Engine
R. G. GRISWOLD In machining the piston a special arbor is made to mount it on, as the truest and best work can be done in this way only. Grip the piston in a chuck or strap it to a face plate and b...
-A Music Cabinet
John F. Adams Many musicians, and especially teachers, accumulate a large stock of sheet music, for the proper storage of which no suitable piece of furniture can be found on sale by furniture deal...
-A New Glow Lamp
It is credited to electric lighting, even by its worst enemies, that it has made the gas people wake up. The gas lamp has been much improved, and as the process has gone on there has been evidence of ...
-Photography. Gum-Bi-Chromate Prints
James E. Masters We hope this article will lead many of our readers to try their hands at gum-bichromate. Gum-bichromate would seem in theory the simplest of printing processes, but in actual pr...
-Photography Notes. To Sensitize Prepared Artist's Canvas For Silver Printing
As a rule the surface of this is very greasy, and it is advisable to gently rub it over with a pad of cottonwool dipped in weak solution of ammonia till it no longer appears greasy. The best method to...
-Writing On Blue Prints
Those who occasionally print by the well-known fer-ro-prussiate process, as well as engineers who copy tracings by this means, may make a note of a rapid and easy method of writing details on such pri...
-The Ohm
Oscar F. Dame Electricians speak of a coil of wire measuring 3 ohms, or an electric incandescent lamp measuring 660 ohms, and the term is such a common one that many amateurs use the word without r...
-Screw Chasing In Wood
Henry Jarvis The chasing of inside and outside threads in the lathe is a task essayed by a great many amateurs, but their work is often attended with very poor results, the cause usually being eith...
-Introduction 5
In this issue will be found the first chapter of the description of the Amateur runabout, which was announced in the previous number. The writer claims but little originality in the design and wishes ...
-Tool Making For Amateurs. VII. A Grinder Head for a Lathe
ROBERT GIBSON GRISWOLD To the amateur, fond of doing fine mechanical work, there is nothing that appeals so strongly as a finely finished piece of work or an absolutely accurate fit. But such accur...
-How To Build A Power Launch. IV. Framing for Deck
CARL H. CLARK If the moulds have not been already removed it may now be done, and any nail holes where fastenings have been put in, should be carefully plugged, using a small wooden plug, if necess...
-How To Build A Power Launch. IV. Framing for Deck. Continued
At the after end the covering boards are cut with a mitre joint, and a piece of similar size is fitted across the stern, joining both covering boards. To support this cross piece, short pieces are nai...
-Trial Trip Of A Battle-Ship
Albert Graham To a few only is given the pleasure of witnessing a full power, speed and endurance trial of a large ship, such as our battleships and cruisers. I will try to describe to the readers ...
-An Occasional Table
John F. Adams Small tables are always in demand for various uses, and the one here described will be found very serviceable in hall, library or chamber. The wood used for constructing it should be ...
-Weather Indications. Afforded By Animals, Birds And Plants
Observations of the habits and conditions of animals and birds, and the appearance of plants, have a recognized value in determining the character of past weather-and, to a limited extent, the weather...
-The School Of The Apprentice
Frederick A. Draper Not every young man has the fortune (or, shall I say, misfortune) to be born with a silver spoon, and has the means wherewith to obtain his education at a technical college. And...
-Finish For Natural Woods
Suggestions regarding the finish for natural woods in interior work are always interesting, and our readers are likely to obtain a hint or two regarding this matter from the reply presented in a recen...
-Junior Department. A Simple Galvanometer
Philip C. Holden Any of the younger readers of this magazine who may desire to construct a galvanometer, will find the one here described quite easy to make and sensitive in action with the small c...
-Small Tool Rack
Geo. E. Gregory How many times may one enter an amateur's workshop and see the various tools scattered about on the benches. And what a contrast with the shop where the tools were well arranged in ...
-Science And Industry 3
One of the favorite methods of forming accumula tor plates quickly is that due to Lucas, in which so-dium perchlorate plays an important part. In general it may be assumed that the best substances for...
-Trade Notes 3
North Brothers Mfg. Company of Philadelphia, Pa., are sending out a neat little pamphlet of a size convenient to carry in the pocket and illustrating and describing Yankee tools. The latter have been ...
-The Amateur Runabout. II. The Wheels
FREDERICK A. DRAPER In building the wheels, as well as the rest of the car, the reader is advised to visit any auto' supply agencies and repair shops which may be conveniently reached, as, by so do...
-A Racing Sailboat
C. C. Brooks Full size patterns for this boat may be obtained of the Brooks Bout Mfg. Ba., Grand Rapids, Mich. The boat here described is a very popular design for inland ponds and lakes and she...
-A Racing Sailboat. Continued
The following instructions are given for those using prepared paper patterns: When the patterns do not intersect you may cut them apart for convenience. Lay the pattern on the material, place it so...
-How To Build A Power Launch. V. The Floors, Transoms and Seats
CARL H. CLARK Across the top of the opening which has been left for entrance to the cabin, a piece about 2 in. wide is to be fastened longitudinally on each side of the beam, to fill it out to the ...
-Suitable Clothing For Boys
A head master of one of the oldest schools in Surrey, the Kingston Grammar School, upon assuming charge recently, addressed a letter to the parents of his pupils urging the adoption of a more rational...
-Book-Binding For Amateurs. IV. Arranging the Signatures
WINTHROP C. PEABODY In most families are to be found numerous magazines which are not valued to the extent of going to the expense of having them bound up at a bindery, but are, nevertheless, well ...
-Tool Making For Amateurs. VIII. Inside Grinder Head for a Lathe
ROBERT GIBSON GRISWOLD If you have ever tried to make an accurate fit in the case of a plug entering a hole, you have doubtless met with considerable difficulty. There are many methods used in mach...
-The Osmium Lamp
The following is an abridged translation of a paper on the osmium lamp read by Herr Fritz Blau before the Elektrotechnischer Verein, of Berlin, on January 24: The total energy radiated by a heated ...
-New Ozone Generator
A new ozone generator has been recently brought out in London and is described in the Electrical Beview, of that city, for November 11. The apparatus consists of a mahogany box about 16x28 in., lined ...
-Introduction 6
The relation of the school system of a country to the welfare of the public is intimate. Indeed, it is of vital importance that proper educational facilities be provided, that all may find it easily p...
-A Refrigerator
John F. Adams Winter has but just left us, yet it becomes necessary to think of summer and the ice man. This leads up to the subject of a refrigerator, the one here described being a size and desig...
-Photography. Portraits By Daylight In And Out Of Doors
Only the merest rudiments of this very interesting occupation can be touched upon. But within the space at our disposal we can, firstly, put the reader on his guard against the special dangers of i...
-Outdoor Portraits
Indoors the lighting is too strong in one direction - from the window on to the sitter. Out of doors the lighting suffers from an exactly opposite defect - it is too even all round. To obtain relief a...
-Dangers From Illuminating Gas
The illuminating gas hazard to life and property is explained in clear and intelligent shape by Fire Marshal Davis of Ohio, as follows: The swinging gas jet with more than one movable joint is saf...
-Ferguson's Mechanical Paradox
The remarkable history of James Ferguson, a self-educated man who achieved a prominent place in astronomical circles during the middle of the last century, affords an incident which will be of interes...
-Measurements Of Resistance
Oscar N. Dame Measurements of resistance are made by comparing the unknown resistance to be measured with certain standards of known resistance, there being several different methods in general use...
-Substitution Method
We know from Ohms law that with the increase of resistance in a circuit, there is a decrease of current. This gives a simple method of approximately determining resistance, but it is not as accurate a...
-Easy Electrical Experiments
Arthur H. Bell The possessor of an induction coil giving an inch spark or over, may construct, at small expense, a number of interesting accessories with which to amuse himself and friends. The ...
-Pointers On The Use Of Drills
The removal of the stub of a stud or bolt broken off short in the hole, leaving nothing to get hold of, is not such a hopeles job as it looks. Put a center-punch mark or center-pop exactly in the c...
-Commercial Success
It has been remarked, and with truth, that one of the secrets, perhaps it may be termed the chief secret, of commercial success is enthusiasm, wisely directed, of course. The business man who strives ...
-Science And Industry 4
U. S. Consul Halstead, Birmingham, England, re reports: The Nonex is a device which, according to public tests recently made in London, renders all receptacles containing inflammable liquids comparati...
-Trade Notes 4
The need of an improved compound nipper with parts perfectly interchangeable has long been felt. Hall's compound and cutting nipper, manufactured by the Utica Drop Forge & Tool Co., Utica, 1ST. Y., ha...
-Electrical Window Display
Oscar N. Dame. A novel electrical display, something out of the ordinary, will attract more attention than any other device. The following illustration shows an attraction which is easily made and ...
-The Amateur Runabout. III. The Front Axle
FREDERICK A. DRAPER We have now reached a part of the work where the reader must rely upon his own diligence to a certain extent, provided he desires to keep the cost down to the lowest point. By t...
-A Racing Sailboat. Planking
C. C. Brooks Planking As both sides are alike, patterns are given for one side only, and as some of the planks are over 16 ft. long, the patterns of these are given in two pieces, as they will h...
-A Racing Sailboat. Coamin. Skeg. Rudder
Coaming The coaming is simply four straight pieces that go around and finish the edge of the cockpit. Get the coaming out of the waste lumber left from planking. It will take two pieces 5 ft. and t...
-A Racing Sailboat. Part 2. Calking
Calking Use a small calking iron and mallet. To calk the lark will require a 1 pound roll of calking cotton. When calking, start at the end of a seam and calk in the end of the thread. Let the thre...
-A Racing Sailboat. Part 3. Sail
Sail When possible, it is always best to have the sail made by an experienced sail maker. However, some amateurs have turned out very creditable sails. The sail is stitched on a sewing machine with...
-Interference In Wireless Telegraphy
John Stone Stone Of the various problems which have been presented in the course of the development of the new art of wireless telegraphy, none is of greater interest to the engineer, and none is o...
-Interference Due To Static Charges
The interference which results from the first of those two sources is readily overcome since the oscillator of a wireless receiving station may always be given a metallic connection to the earth suffi...
-Interference Due To Electromagnetic Waves
Coming now to the prevention of interference by elec tromagnetic waves such as emanate from other wireless stations than that with which it is desired to hold communication, and to the prevention of i...
-Transmitter
In modern wireless telegraphy the messages are transmitted by electromagnetic waves which are horizontally polarized at the earth's surface, and which are developed by electrical oscillations whose ax...
-Transmitter. Continued
If, however, the elevated conductor be not directly connected to the earth, but be connected to it through an inductance coil, both theory and practice show that its electrical vibrations correspond t...
-Receiver
Since the electromagnetic waves to be received at a wireless receiving station are horizontally polarized at the earth's surface, an electrical oscillator whose axis is normal to the earth's surface i...
-A Simple "Wireless" Outfit
Charles D. Horton There is something mysterious about wireless telegraphy. It appears to the uninitiated as a magical art; a science unfathomable except to a few whose researches have given them un...
-Introduction 7
Those of our readers who have not a complete file of this magazine, should order at an early date as the snpply of back numbers of volumes I and II is being rapidly exhausted. The present supply is al...
-The Metal Working Lathe And Its Uses. I. Description of the Lathe
ROBERT GIBSON GRISWOLD Without exception, the screw-cutting lathe is the most universal machine tool that we have. Especially is this so when fitted out with various attachments for performing many...
-The Metal Working Lathe And Its Uses. Description of the Lathe. Continued
It should be cited that two sets of ways are frequent-ly provided for this reason ; the head and tail stocks are mounted on one set, which are never worn to any extent and therefore always remain in l...
-How To Build A Power Launch. VI. Installing the Engine
CARL H. CLARK In choosing the engine, as good a machine should be purchased as the means at hand will allow. Although the four-cycle type is rather more reliable and economical of fuel, almost any ...
-Secondary Technical Education
Secondary technical education has come to mean that instruction in technical schools which stand midway between the engineering college course and the trade school course. It consists of study and pra...
-Book Binding For Amateurs. V. Stitching the Book
WINTHROP C. PEABODY The books having been arranged and placed as described in the previous chapter, they are then ready for the important operation of sawing and sewing. The book or books are evenl...
-Photography. Why? Some Beginners Questions Anticipated And Answered
T. Thorne Baker If for the term why and wherefore , we had substituted the word chemistry, the beginner would very likely have passed over this article, thinking it altogether beyond his ken. ...
-Photographic Notes 1
Twenty years ago, said Dr. Hollingsworth, it was a common practice to over expose, whereas, nowadays, with beginners, at least, it seems to be nothing but hand cameras and under exposure, and it seems...
-Swing Seat For Piazza
John F. Adams Swing seats for the piazza are becoming very popular, and the near advent of warm weather leads one to think of fittings which will add comfort during the -season when out-door rest i...
-A Simple Drawing Table
C. D. Shreck This table is intended for the amateur who desires to construct his own table at a small cost, and have when completed one that will answer ail requirements and be satisfactory in ever...
-Angle Plate For Lathe
Frank H. Jackson The angle-plate is one of the handiest attachments to a lathe a workman can have, and is one of the easiest to make. If the tool of tools (the lathe) is used to its fullest capa...
-Science And Industry 5
A grammaphone which, it is said, can be heard at a distance of three miles is the latest invention of the Hon. C. A. Parsons, of turbine fame. The instrument, which was exhibited privately at Metzler'...
-Trade Notes 5
Some interesting Facts is the title of a well gotten up booklet issued by E. Atkins & Co., Inc., Indianapolis, Ind., which presents the points of merit of the goods manufactured by this company. Ev...
-Simple Lessons In Wood Inlaying
A. C. Horth. Inlaying is a craft that allows of no scamping, and should be attempted by no one who expects to get good results with little work. Its difficulties, however, are more apparent than ac...
-Outwitting The Robins
Carl B. Faume Last year our cherry trees suffered from the depredations of robins, and we lost many baskets of luscious white hearts in consequence. This year our trees have blossomed so luxurian...
-A Cheap Nine-Inch Reflector. I. Tools and Materials Needed
M. A. AINSLEY The telescope I propose to describe was made some two years back, and since it was finished several improvements and alterations have occurred to me - these I will indicate as I proce...
-The Bench Or Support For Tool
An old paraffine cask was what I used; but it was not high enough for me, as I stand 6 ft. 2 in., so I raised it another 6 in. or so by means of a stout box, which should be as flat as possible, to ke...
-The Grinding Material
Throughout the grinding operations I used ordinary emery. 1 understand that carborandum is a much more effective grinding material, and I am told it cuts far more rapidly; but it is much more expen...
-Rough Grinding
In order to hold the mirror comfortably and to avoid touching it with the fingers during fine-grinding, I obtained a disc of hard wood 6 in. in diameter and $ in. thick with a handle 1 1/2 in. thick a...
-The Uses Of High Speed Steel
The writer has taken a good deal of interest in the method of using, treating and grinding high-speed steels. The first thing is to make up one's mind as to the quality or kind of steel to use, which ...
-The Uses Of High Speed Steel. Continued
No doubt the readers of this article will know the results that some of us have arrived at in the last two years. In regard to cutting speeds and feeds there has been and always will be difference of ...
-A Reading Stand
John F. Adams Many readers of Amateur Work are undoubtedly -studious'and given to reading, and when such reading is from a large and heavy book, fervently wish for some kind of supporting device wh...
-Marine Gasoline Motors. Their Design And Operation
By Courtesy of the Brooks Boat Mfg, Co. Most manufacturers of these motors claim that theirs is the best, most reliable motor on the market, and in support of this claim give a detailed description...
-Marine Gasoline Motors. Their Design And Operation. Four Cycle Motors
Four Cycle Motors The four cycle cylinder has both the intake and exhaust openings at the top of the cylinder, and they and operated automatically by valves instead of by the piston as in the two c...
-Marine Gasoline Motors. Their Design And Operation. Vaporizing The Fuel. Control
Vaporizing The Fuel There are in general use two devices for mixing the gasoline and air to form the vapor. These are the vaporizer and the carburetor. The vaporizer is a device that mixes the gaso...
-Thunder Storm Indicator
Oscar F. Dame Every student of wireless telegraphy is familiar with the story of the first coherer, with which electrical disturbances in the air were noted by the operation of a relay and the ring...
-Book-Binding For Amateurs. VI Rounding: the Back
WINTHROP C. PEABODY The sewing completed, an examination should be made to ascertain that all sheets, plates, etc., have been securely fastened. The next operation is the addition of the end papers...
-The Metal Working Lathe And Its Uses. II. Screw Cutting - What Gears to Use
ROBERT GIBSON GRISWOLD Perhaps the one feature above all others that makes the engine lathe so valuable and the king of machine tools, is its power of screw cutting. By means of the lead screw ...
-The Metal Working Lathe And Its Uses. Screw Cutting - What Gears to Use. Continued
This will alter the formula given above'to this extent. The apparent pitch of the lead-screw will be in-increased, and before calculating its gear, multiply the number of threads per inch by 2 if the ...
-Wireless Telegraphy At Night
Wireless telegraphy by night has a notable phenomenon attached to it. Technics points out that there is conclusive proof that wireless telegraph signals can be transmitted to a greater distance by...
-Photography. Changing And Developing Box
E. Mason The piece of apparatus described and illustrated be-low is one, the use of which by many photographers, means dispensing with the dark room altogether. A dark room, to most, is necessary o...
-Difficulties In Development
Beginners often wrap exposed, but not developed, plates in printed paper, with the result that, in development, the letters appear on the negative, often to such an extent as to spoil the plate comple...
-The Amateur Runabout. IV. The Rear Axle
FREDERICK A. DRAPER The rear axle of an auto requires quite as careful work as any other part. It is not only subjected to bending strains due to vertical load, but it must also resist the pull of ...
-Principles Of Arc Lamp Construction
Electricity may be defined as matter in motion along definite lines through material capable of having its particles moved by this force. When the particles yield readily to the force brought to bear ...
-Relays For Wireless Telegraphy
Arthur H. Bell. Amateurs interested in Wireless Telegraphy are often puzzled as to the best relay to use in connection with their receiving apparatus, and as a sensitive relay is very essential, I ...
-Photographic Notes 2
A good photograph of a lightning flash is reproduced in a recent issue of Photography . The photograph was taken in July last at Weston-super Marc by T. G. . Goodman, A. C. P., F. R. G. S., who sta...
-One Session For Schools
Dr. Otto Dornblueth, of Frankfort, a specialist in nervous diseases, writes against the practice of holding afternoon sessions in the public schools. In support of his position he points to the invest...
-Books Received 4
American Telephone Practice. Kempston B. Miller. Fourth edition. Enlarged and Entirely Rewritten. 904 pp., 6 1/2x10 in. 643 Illustrations. Cloth. Price, $4.00. McGraw Pub. Co. New York. Supplied by Am...
-Correspondence 2
No. 89. Port Orchard, Wash., May 3, 1905. Having been a subscriber for and purchaser of of every copy of Amateur Work which has been issued, I presume to seek the following advice: Between my offic...
-Science And Industry 6
The size of the Atlantic waves has been carefully measured for the Washington Hydrographic Bureau. In height the waves usually average about 30 ft., but in rough weathertheyattain from40to48ft. In sto...
-Albo-Metal Relief
Under the name of Albo-Metal Relief, we have a new kind of repousse' work that will commend Itself to amateuis on account of its simplicity, cleanliness, and the freedom from noise connected with ...
-Egg Skins For Wounds
At a recent session of the Therapeutical Association of Paris, Dr. Amat lectured on the use of the membrane of eggs in the treatment of wounds. He has observed for some time the good results of placin...
-The Lightning Rod
It is interesting to observe the grogress of the lightning rod in the favor of men competent to judge of its merits. Years ago it was the bane of the land, and the lightning-rod agent was as little fa...
-The Interruption Of Primary Currents. In Ruhmkorff Coils
Oscar N. Dame In connection with the operation of induction or spark coils, we find the interrupter he easiest part to manufacture, but the most difficult to design to meet the condition of the coi...
-Book Binding For Amateurs. VII. Putting on the Covers
WINTHROP C. PEABODY A previously mentioned, preference is given in these articles to the styles of biuding likely to be most used by those who care only to bind magazines and books with inexpensive...
-Destroying Plant Lice
The Practical Counsellor for Fruit and Garden Culture, of Frankfort, Germany, recently offered a prize for the best method of destroying plant lice, for which 58 persons competed. The prize was awarde...
-A Death Test
Although physicians assert that the possibility of being buried alive can only occur where a medical examination has not been made, German papers state that a stronger, absolutely reliable guaranty fo...
-A Cheap Nine-Inch Reflector. II. Medium and Fine Grinding
M. A. AINSLEY Medium Grinding We will suppose now that the mirror is roughened out, and that the depth of the concavity in the center is judged sufficient. It is hard to say how long this should...
-Fine Grinding
We have now got rid of the surface produced by the coarse emery, and the figure of the speculum is beginning to approximate to a sphere. The object of the fine-grinding is to perfect the spherical fig...
-Papaya Juice
Papaya juice is extracted from the fruit of the pa-paw tree, which grows rapidly, attaining its full bearing capacity in a year. It produces from 40 to 50 pa-paws of a dark green color, ripening to a...
-Photography. The Carbon Process
Chester F. Stiles The name carbon process is a misnomer, as in this most beautiful of photo devices, we are not held down to a rigid set of tones, but may, by varying our coloring materials, prod...
-Photography. The Carbon Process. Continued
When the paper comes off, wash the print gently with the warm water. The pigment not acted on by light will gradually loosen and fall away from the tissue, and the image will begin to appear. Now, if ...
-Iodine Cure For Tuberculosis
United States Consul Harlan W. Brush, of Milan, Italy, transmits information regarding the reported discovery, by Prof. Joseph Levi, of Milan, of a cure of tuberculosis by the use of a specially prepa...
-A Student's Folding Bed
John F. Adams The usual student's room is one in which surplus space is not abundant, and where the furniture has been selected to fit the available places. When visitors are numerous, as they freq...
-Instantaneous X-Ray Photos
X-ray photography has labored under the disadvantage of demanding long exposure, while, for practical purposes, instantaneous pictures were required. Pro fesser Rieder and Dr. Joseph Rosenthal, of Mun...
-New White Paint
British trade journals describe a new white paint, patented in Germany, whieh is claimed to far excel lead and other similar products, in fineness and smooth-ness of surface, covering power, permanenc...
-Introduction 8
Of late many inquiries have been received which have been of such a character as to necessitate a few limitations in the Correspondence Department. We cannot give advice as to the merits and commerc...
-The Ruhmkorff Coil
John E. Atkins The amateur interested in electricity should make himself familiar with the various parts of a spark coil; it is proposed, therefore, while avoiding as far as possible electrical tec...
-Technical Education
The following are abstracts from an address, entitled Commerce and Culture, delivered by Sir Swire Smith, a leading English authority on industrial art and technical education, on the occasion of th...
-Practical Education And Literary Culture
As to the bearing of practical side of education on literary culture, Mr. Henry Smith Williams, in an article on the Literature of Science, shows by remarkable examples that some of the greatest maste...
-Marine Gasoline Motors. Their Design And Operation. Lubrication
By Courtesy of the Brooks Boat Mfg, Co. Lubrication A gasoline motor requires ordinary intelligent care. It should be kept clean internally and externally. Grease and dirt form conductors, injur...
-Marine Gasoline Motors. Their Design And Operation. Troubleshooting
Hints To The Amateur Operator There are four important points that the operator must attend to. First, the ignition; second, the mixture; third, the lubrication, and fourth, the water circulation. ...
-Books Received 5
Spangenberg's Steam and Electrical Engineeing. In Questions and Answers. E. Spangenberg, M. E.; Albert Uhl, A. I. E. E., and E. W. Pratt. 672 pp. 8 1/2 x 5 1/2; 643 Illustrations. George A. Z...
-Electric Purification Of Drinking Water
The Frankfort News states that it is probable that electric purification of drinking water will soon be introduced into the home. This method, already used by a number of municipal waterworks, is ...
-The Metal Working Lathe And Its Uses. III. Screw Cutting. Kinds of Threads
ROBERT GIBSON GRISWOLD The two threads in principal use in this country are the sharp V thread and the Sellers or U. S. Standard thread. The former, shown in Fig. 1, is the one most readily cut....
-Pattern Varnish
C. C. Bosworth Every pattern-maker with any regard for his reputation loves to see the object of his skill leave his hands with a luster and without a scratch or blemish, and what is his consternat...
-Correspondence 3
No. 96. East Orange, N. J., June, 2, 1905. I have a small 1 in. induction coil which I recently purchased, and wish to know if same is good for wireless communication over water for two miles? If n...
-Deforestation And Climate
During the May session of the German Meteorological Society at Berlin, a lecture on Deforestation and Climate was delivered by Dr. Hennig from which United States Consul-General Guenther, Frankfort...
-Science And Industry 7
The televue, or seeing telephone, as it is called, is the invention of J. B. Fowler, of Portland, Ore. Mr. Fowler is not a scientist, but a humble workmen, who has been classed as an inventor from the...
-Thermit. What It Is And Does
The Thermit heating and welding compound is coming to the front as a ready and practical method of effecting economy in various ways in shop practice. One great saving brought about by its use is i...
-Sensitive "Wireless" Receiver
Arthur H. Bell. In wireless telegraphy one of the chief difficulties which operators have had to contend with is the securing of a sensitive and reliable receiver of the wave impulses from the tran...
-Washer Cutter
W. G. Miller A tool to facilitate the cutting of discs and washers out of wood, fibre, rubber and soft, thin metal, is a necessity in most electrical and mechanical workshops. The writer recently, ...
-A Wall Tent
M. T. Browne The wall, or camping tent, possesses many advan-vantages over the tent known as the A tent, inasmuch as the sides can be lifted in pleasant weather to allow a cross current of air thro...
-Safeguards For Workmen
The Monitor the official organ of the Belgian Government, has just published a decree prescribing: the precautionary measures to be observed by owners of workshops to safeguard the health of the emp...
-Photography. Masking Negatives
William A. Ingram Beginners too often make prints from the whole of each negative, regardless of the fact that a portion would in many cases make a more satisfactory picture although, of course, le...
-Method Of Procedure With Film Negatives
Attach the film to the drawing board with two thumb tacks, using a tee square to insure the perpendicular lines on the negative being parallel to the sides of the board. To facilitate this adjustment ...
-Making Glass Negatives
The procedure when masking glass negatives is not exactly the same as with films. Take a strip of passe partout binding about three inches longer than the sum of the four sides of the negative. Fasten...
-Personal Recollections Of The Electrical Industry
Prof. Elihu Thompson Let us, In opening what will be but a brief outline of the development of the electrical industry in Lynn, look back to the conditions about 1876. In that year the Centennial E...
-Personal Recollections Of The Electrical Industry. Part 2
In 1878 this machine was shown, as I have mentioned, at the Franklin Institute. It attracted the attention of Mr. Garrett, a typical Philadelphia Quaker, who was then the agent of the Brush Company, w...
-Personal Recollections Of The Electrical Industry. Part 3
Just at that time it happened that two or three gentlemen of Lynn, Mr. Henry A. Pevear, the first president of the Thomson-Houston Electric Company in Lynn, Mr. Silas A. Barton, the business manager, ...
-The Interruption Of Primary Currents. In Ruhmkorff Coils. Continued
Oscar N. Dame In the vibrating form of interrupter, whether core actuated or not, platinum is used for contact points because of its conductivity, hardness and freedom from smut or oxidization. The...
-Wire Gauge Table
By Courtesy of Brown & Sharpe Mfg. Co. Different Standards For Wire Gauge In Use In. The United States Dimensions of Sizes in Decimal Parts of an Inch. ...
-A Gramaphone Cabinet
John F. Adams A gramaphone is a rather inconvenient instrument to handle, and without a suitable cabinet, is not convenient to put away when through using. The cabinet here described will contain a...
-"Wireless" Communication Among Savages
Many explorers have commented on the speed with which news travels among savage tribes. A curiou3 observation as to a possible solution of the problem of their methods has been made by the Rev. A. Rid...
-Introduction 9
To impress upon the youth and young man the necessity of utilizing to the utmost every opportunity for educational advancement is now, as it always has been and is likely to continue, a well nigh impo...
-Fifteen-Foot Duck Boat
By Courtesy of the Brooks Boat Mfg. Co. The following materials are required: Oak, Maple Or Ash One piece 32 in. long, 5 in. wide, 1 3/4 in. thick for stems. Eighteen running feet 1 ...
-Sleeping Sickness
Col. David Bruce who, in Uganda and elsewhere has been inquiring into the cause, effect and distribution of sleeping sickness, addressed a meeting at the Royal Institute of Public Health on the sub...
-Ammonia. The Process Of Manufacture
Abstract of a paper read at a meeting of the Cold Storage and Ice Association, London, Eng., by Mr. Charles Page. You are, no doubt, all familiar with the form of a gas retort in which coal is dist...
-A Cheap Nine-Inch Reflector. III. Construction of the Polisher
M. A. AINSLEY We have now arrived at the point where the worker will begin to appreciate the real difficulties of the work. Up to this point all has been fairly easy; but the beginner must not be d...
-A Cheap Nine-Inch Reflector. Construction of the Polisher. Continued
We have now to mount these squares of pitch on tothe glass roof to make the polisher, and I may say at once that the position of the central square with regard to the center of the tool is a matter of...
-Cabinet Maker's Clamps
The amateur who engages in woodworking has frequent need of clamps for gluing up stock to make wide widths such as table tops, etc. Clamps for such purposes can easily be made at small expense, as her...
-The Metal Working Lathe And Its Uses. IV. Tools and Turning
ROBERT GIBSON GRISWOLD If a canvas was made throughout the various shops in this country, a great diversity of opinions would be found to exist as to just how a tool should be ground for certain wo...
-Books Received 6
Practical Wood Carving. Fred T. Hodgson. 284 pp. 8 1/2 x 5 in. 185 Illustraitons. Cloth. Price $1.50. Frederick J. Drake & Co., Chicago, 111. Supplied by Amateur Work. The amateur who desires to...
-Alchohol In Manufactures
The importance of readjusting the internal revenue regulations and taxes on alcohol is clearly brought out by the United States Consul Halstead, Birmingham, England, who reports: The London, Mancheste...
-Electric Shocks
One of the new and not uncommon dangers of modern life is that of getting in the way of a powerful current of electricity and receiving the entire discharge through the body. The effects of such a dis...
-How Pins Are Made
The United States practically supplies the world with pins. In this country we use annually of common pins no less than ten billion, or ten thousand million. This is an average of not far from 136 pin...
-Aluminum Plating Process
Aluminum, on account of its great lightness and its toughness when alloyed with other metals, has, since its production, been so enormously cheapened, come into general use for a multiplicity of purpo...
-Science And Industry 8
Two men employed in an Edinburgh rope factory have invented an apparatus for carrying off dust and bad air created by the machinery used in the flax industry. The principal sources of dust in a flax-p...
-Correspondence 4
No. 98. Lowell, Mass., July 10, 1905. I would very much like to correspond with any readers of Amateur Work living in this sectton who are interested in wireless telegraphy. An interchange of ideas...
-Vacuum Tube Window Display
Oscar N. Dame. As many readers of this magazine are the possessors of spark coils giving from one to two inch sparks, they will be interested in learning how, during the winter holiday season, they...
-Cement Walks And Floors
Many farm houses have no walks about them. In too many cases only weedy paths lead to the front door and to side porches. We should plan to change these farm houses into farm homes. One of the best...
-A Sewing Cabinet
John F. Adams The amateur cabinet maker should, whenever possible, lend his skill and labor to the making of furniture which will be serviceable to the gentler part of the family, thereby making ea...
-Foot Motion For Bench Lathe
Frederick A. Draper The amateur who possesses a bench lathe does not always find it convenient to operate it by power and is obliged to either purchase or make a foot motion for driving it. Those w...
-Durable Whitewash
The complete success is well known of the formula for whitewash adopted by the United States Government as a coating for lighthouses, and for its effectual prevention of any moisture striking through ...
-Facts Concerning Patents
A Paper read by Mr. F. W. Winter before the Mechanical Section of the Engineers Society of Western Pennsylvania. Engineer , should have a general knowledge as to what rights they have in inventi...
-Facts Concerning Patents. Continued
Invention. As to what constitutes invention no general rule can be laid down. There are many improvements which are the natural result of the advancement of an industry and which are suggested by many...
-The Metal Working Lathe And Its Uses. V. Facing and Boring
ROBERT GIBSON GRISWOLD For truing up flat surfaces, the piece to be operated upon is strapped to the face plate either directly in contact therewith or, if it has one finished surface, it is laid o...
-Gas Engine Economy
The question of economy in the consumption of fuel is of great importance to the purchasers of gas or gasoline engines, and incidentally to the manufacturers of these engines also. For, all things bei...
-Frost On Show Windows
During the winter months many shopksepers experience more or less difficulty in keeping their windows free from the ice that in low temperature tends to defeat the object of the display. No doubt all ...
-A Tailless Or Malay Kite
Charles B. Gilmore Kite flying has, within recent years, progressed beyond the field of affording amusement for boys and is now frequently used for both scientific and useful purposes. As a means o...
-Introduction 10
Mention lias frequently been made in these columns of various phases of industrial education, with a view to emphasizing its importance to the individual worker as well as to the employer. It is now p...
-A Cheap Nine-Inch Reflector. IV. Figuring a Parabolic Speculum
M. A. AINSLEY So much has been written on the subject of figuring a parabolic speculum, and so well has the matter been explained, that it may seem rather a waste of space for me to try and repeat ...
-Mineral Possibilities Of The Pacific Coast
The existence of wonderful mineral resources throughout the United States has been shown by governmental and private enterprise, the development of the useful metalliferous minerals is being pushed by...
-Electric Batteries. Their Construction And Uses. Principles of Battery Action
FREDERICK A. DRAPER The multiplicity of types and kinds of galvanic batteries and the variety of uses to which they may be adopted, is more or less confusing to the novice in electrical work. These...
-Horse Power
How It Compares with that of a Man. At his very best, the strongest man stands in pretty poor comparison, even with a horse, for hard, continu-uous labor. He might perform for a few minutes one-hal...
-Gas Engine Cylinder Cooling
To obtain the greatest economy from the cylinder of a gasoline engine, the temperature should be as high as possible to permit of successful running and proper lubrication. This necessitates the use o...
-Hectograph Formula
A reader recently asked for a formula for making hectograph pads, and through the courtesy of Mr. H.E. Smith, chemist and engineer of tests of the L. S. & M. M. S. K. R., we are enabled to fnrnish the...
-Specific Gravity Of Minerals
The specific gravity of a mineral is its weight compared with some substance taken as a standard. Distilled water is taken as a standard for liquids, air or hydrogen for gases, the weights of bodies b...
-Photography. Passe Partouts From Negatives
William A. Ingram Passe partout binding strip is a very useful article for an amateur photographer to possess. It can be used for a number of purposes, among which may be mentioned masking negative...
-Resistance For "Wireless" Receiver
Arthur H. Bell The resistance coil mentioned in connection with the wireless telegraph receiver in the August number of this magazine, is not a single coil, but rather a set of coils of very fine...
-Irregular Ignition Of Gas Engines. Repairing Asbestus Gas Logs
Henry C. Flacke An essential point in obtaining a strong spark is that a good contact shall be made before the contact points are forced apart. In practically all make and break igniters, the mo...
-Correspondence 5
No. 103. Santa Barara, Cal., Aug. 8, 1905. I would like to ask a few questions relative to using an alternating current to excite an induction coil giving a two-inch spark or larger capacity. Ca...
-Government Ownership Of Railways
Government ownership and reduced rates are popularly assumed to be synonymous. But it may work the other way, says the Railway Age. After years of increasingly unprofitable operation of the Intercol...
-Celluluse From Cornstalks
After extensive and elaborate experiments by the United States Government, it has been discovered that cellulose in considerable quantities may be extracted from corn stalks, and the industry promises...
-Books Received 7
The Naval, Constructor. George Simpson, M. I. N. A. 585 pp. 6 1/2 X 4 inches. Flexible leather. Price $5.00. The S. Van Nostrand Co., New York. The rapidly increasing importance which naval architectu...
-Science And Industry 9
Every railroad wreck that has as one of its horrors the burniug to death of imprisoned passengers, calls attention afresh to the steel car and the larger place it must take in the construction of pass...
-Trade Notes 6
The new catalogue of files and rasps, manufactured by Henry Disston & Sons, Philadelphia, Pa., should be on the desk of every teacher of metal working in the manual training schools of this country. I...
-Model Making For Amateurs
Proposed Society Of Model Makers. The accompanying photographic view and drawings illustrate one of several small models obtained by Mr. Parsell of Parsell & Weed, New York, during a recent visit t...
-Wave Length In Wireless Telegraphy
Oscar N. Dame Since it has been determined that the velocity of all etheral waves is the same, practically, it may be noted that the length of each wave varies inversely with the frequency. To e...
-New Edison Battery A Success
Thomas A. Edison makes the important declaration that he has at last solved the problem of providing cheap and serviceable storage batteries for vehicles. He is quoted as saying: By October my light ...
-Magnetic Properties Of Alloys
At a recent meeting of the Royal Society of England J. A. Flemming and R. Hadfield gave the results of some of their investigations on the magnetic properties of alloys. They have found that an alloy ...
-New Armor Plate Mill
The successful test of the first lot of armor plate made by the Midvale Steel Co., is a master of more than common interest. It has been generally held that it was idle to expect the discovery of any ...
-Photography. Portraiture Indoors
I am sure I do not know why, but one of the first an amateur attempts to do is to take a portrait. Sometimes he is successful and gets something that pleases his sitters, and sometimes he does not - m...
-Photos On Watches And The Like
There is evidently a growing taste for photographic portraits on such articles as watches, gold or silver cigarette cases, match boxes, etc., and the jewellers who undertake to get this class of work ...
-Facts Concerning Patents. Inventions and Claimaints
A Paper read by Mr. F. W. Winter befo.e the Mechanical Section of the Engineers Society of Western Pennsylvania. Several Claimants For Same Invention It is never absolutely certain that a patent...
-Patent Does Not Guarantee That Invention Can Be Used
The grant of a patent is no indication that the device covered thereby can be used without infringing prior patents. This is a point upon which much misunderstanding exists. Many persons assume that b...
-Who May Obtain A Patent
It is essential to the validity of a patent that it be granted on an application signed and sworn to by the original and first inventor or inventors, or his or their executors or administrators. No ot...
-Patent Rights Between Employer And Employee
Employees as well as employers are entitled to their own inventions and to patents granted therefor. This right can be modified by contract, but in the absence of a contract to the contrary an employe...
-Applications For Patents
Only a small percentage of patent applications are allowed as first filed. Generally the officials find some objections against the specifications or claims, generally the latter. It frequently happen...
-Marking Patented Articles
The owner of a patent must mark the patented articles plainly with the word patented, or similar word, together with the date of the patent, or otherwise give sufficient notice to the public that t...
-Foreign Patents
The patent laws of no two countries are the same, and a device which is patentable in this country may not be patentable in foreign countries, and vice versa, devices which are not patentable here may...
-The Design And Construction Of Induction Coils
Basil Graves It has occurred to me that not a few of our readers would appreciate a brief contribution upon this subject in general, if I may be permitted to judge from the number of queries dealin...
-The Design And Construction Of Induction Coils. Part 2
I now append a table showing the dimensions of the most important parts of coils up to those capable of giving a 3 in. spark. In the case of the condenser the reader will understand that the figures i...
-The Design And Construction Of Induction Coils. Part 3
The condenser, for convenience, should be built in four separate sections connected to a four-way plug key in such a manner that the capacity may be varied at will. The whole should be clamped between...
-The Design And Construction Of Induction Coils. Part 4
The interrupter is included in series with the main primary circuit of the coil, the current passing through the mercury and shaft of the motor, by way of the revolving metal disc. It is sometimes adv...
-Introduction 11
The present number completes the fourth year of the publication of this magazine. We take this occasion to express our sincere appreciation of the cordial support given us by our readers, and of our i...
-Electric Batteries. Their Construction And Uses. II. Polarization - Single and Doable Fluid Cells
FREDERICK A. DRAPER As noted in the previous chapter, during the action of a cell, the hydrogen bubbles which are liberated collect on the surface of the negative plate or cathode, and unless remov...
-Match Making
In the latest match making machine, the wood from which the match splints are made is pine plank two inches thick which, after thorough drying is re-sawed into lengths one and seven-eighths to two and...
-A Cheap Nine-Inch Reflector. V. Apparatus for Testing Lenses
M. A. AINSLEY Presuming that the reader has mastered Chapter IV, giving the theory of the pinhole test at the center of curvature, I will briefly describe my apparatus: - It simply consists of a wo...
-A Cheap Nine-Inch Reflector. Apparatus for Testing Lenses. Continued
The adjustment of the mirror to reflect the imag through the tube is a long job at first. A large sheet of white paper held behind the testing apparatus to receive the image of the hole is a great hel...
-Galvanizing Process
Consul-General Guenther, of Frankfort, writes that German papers report that Mr. Cowper Coles, an Englishman, has invented a new process of galvanization, and has recently demonstrated the same with s...
-The Practical Utility Of Manual And Technical Training
Abstracts from an Address delivered by Wm. Barclay Parsons before the National Educational Association. Not being engaged in education, I approach the topic of this evening's discussion, namely, T...
-The Practical Utility Of Manual And Technical Training. Continued
Although there is a great difference in the scope of the educational work in the technical college and the most advanced of trade schools, yet there is the similarity that both deal with mechanical ap...
-Technical Education In Germany
Though the average American is far ahead of the German or Frenchman in inventive talent, he is handicapped by lack of technical knowledge, reports Richard Guenther, Consul-General, Frankfort, Germany,...
-Purifying Water With Ozone
The Ozone Plant in West Philadelphia is in operation and tests of its work in water purification have been made by Messrs. Rivas, Jackson and Hale. Raw Schuylkill River water contains as high as 2,500...
-The Flight Of Meteors
Meteors, before encountering the earth's atmosphere are invisible to us traveling in their own orbits about the sun. Immediately on striking the earth's atmosphere their kinetic energy begins to be ch...
-The Metal Working Lathe And Its Uses. VI. Boring Cylinders
ROBERT GIBSON GRISWOLD The screw-cutting lathe is a machine peculiarly adapted to the boring of cylinders, field castings for motors and dynamos and, in fact, almost any long, cylindrical holes in ...
-Reference Book Holder
John F. Adams Such bulky volumes as the dictionary, atlas, and similar books, are frequently to be found in rather inaccessible places, and consequently are not used as often as might be desired, o...
-Books Received 8
Wireless Telegraphy, Its History, Theory and Practice. A.Frederick Collins. 297 pp. 6x9 in. 323 Illustrations. $3.00. Supplied by Amateur Work. This volume may properly be classed as one o...
-Correspondence 6
No. 107. Tipton Ind., Sept. 6, 1905. How are coherer filings made? Is there a relay sensitive enough to operate when waves powerful enough to click in the telephone receiver enter upon a wireles...
-Amateur Work 1905 News
The inspector-general of the Paris, Lyons & Meditteranean Railroad Company, Lyons, France, says that his road uses large quantities of coal briquettes, about 10 per cent of its fuel consisting of them...
-Amateur Work 1905 News #2
Osmon, a new fuel, is made from peat. The peat used contains 90 per cent of water, of which 20 to 25 per cent is removed by means of an electric current. The peat is then further dried and passed thro...
-Amateur Work 1905 News #3
The city of Paris now has street sweepers, fire engines, post-office vans, and dust carts propelled by motors. There is no place in the modern world for the unskilled; no one can hope for any genu...
-Amateur Work 1905 News #4
An indication of the immense business being done in the iron trade is the congestion of the tracks by cars loaded with the products of the mills in the vicinity of Homestead, Pa., and other manufactur...
-Amateur Work 1905 News #5
In a review of the progress of aerial navigation, M. Octave Chanute says that the best shaped navigable balloon yet constructed was that which was made by MM. Krebbs and Renaud of the French War Depar...
-Amateur Work 1905 News #6
Those who wonder whether wireless telegraphy is really practical should notice what Gen. Greeley, chief of the army signal service, has to say on the subject. He is enthusiastic over the success atten...
-Amateur Work 1905 News #7
What is said to be the largest tree in the world is reported from Tulare County, Cal. This giant sequoia measured 36 feet in diameter and 113 feet in circumference 4 feet from the ground. According to...
-Amateur Work 1905 News #8
The temperature attained by the burning gases in the combustion chamber of a gasoline motor cylinder, at the moment of explosion, is in the neighborhood of 3000 Fahr., while the temperature of th...
-Amateur Work 1905 News #9
A classification of electric motors shows them to be divided into groups according to their winding and the character of the current employed to operate them. The direct current is used for motors wou...
-Amateur Work 1905 News #10
Speaking at the Royal Institute, London, recently, on Fungi, Prof. Ward said that the mould on wall paper was rather on the paste than on the paper. With cheese, it was the water in it that gave r...
-Amateur Work 1905 News #11
An English paper reports that a Norwegian has invented a telephone by which the noise made by fish in the depths of the _sea can be heard. The instrument consists of a microphone in a hermatically sea...
-Amateur Work 1905 News #12
Where it is impracticable to thoroughly drain the swamp regions, says Aboriculture, an improvement may be effected by planting willows and other growths which emit roots readily from cuttings, and...
-Amateur Work 1905 News #13
Babbitt metal is an alloy of copper, tin and antimony. It is soft and nearly white, and is used as an anti-friction metal. Isaac Babbitt, of Boston, patented the alloy in 1839, and the original alloy ...
-Amateur Work 1905 News #14
At a recent meeting of the Royal Society of England J. A. Flemming and R. Hadfield gave the results of some of their investigations on the magnetic properties of alloys. They have found that an alloy ...









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