$290 FOR BEST PIANOS IN THE WORLD

- in use all over the U.S. in over 900 towns by persons you will find in our Illustrated Circular, probably residents of your own place, or very near, where you can try our pianos. Genuine Rosewood - overstrung - full iron plate - 7 1-3 octaves - Agraffe - and possessing every improvement known, and warranted 5 years by a responsible incorporated Manufacturing Co., referring by permission to the Chemical National Bank, New York City, by far the strongest bank in America. Pianos sent everywhere on trial. We have no agents. Send for Illustrated Circular giving full particulars. Address

UNITED STATES PIANO COMPANY.
810 Broadway, New York.
(Please name this paper.)

PRACTICAL TREATISE ON THE PROPERTIES OF CONTINUOUS BRIDGES.

By Charles E. Bender, C.E. Illustrated. Being No. 26, Van Nostrand's Science Series. 18mo. boards, 50 cents. Recently Published. THE FATIGUE OF METALS UNDER REPEATED STRAINS, with various tables of results of experiments, from the German of Prof. Ludwig Spangenberg, with a preface by S.H. Shreve, A.M. 18 mo. bound, 50 cents. D. Van Nostrand, Publisher, 23 Murran Street, and 27 Warren Street.

Copies sent free by mail on receipt of price.

WANTED - A SECOND-HAND SHAPING

Machine; 12 inch stroke; in good condition. Pratt & Whitney's make preferred. Address, with full particulars as to size, make, and price, R.G.E., 589 Lorimer Street, Greenpoint, L.I.

Wood-Working Machinery,

Such as Woodworth Planing, Tongueing, and Grooving Machines, Daniel's Planers, Richardson's Patent Improved Tenon Machines, Mortising, Moulding, and Re-Saw Machines, and Wood-Working Machinery generally. Manufactured by WITHERBY, RUGG & RICHARDSON, 26 Salisbury Street, Worcester, Mass. (Shop formerly occupied by R. BALL & CO.)

Brainard Milling Machines

all styles and sizes. Universal Milling Machines from $200 upwards; Brown's Patent Screw Machines. etc., etc. Address BRAINARD M.M. CO., 131 Milk St., Boston, Mass.

AGENTS TO CONTROL TERRITORY,

West and South (New England States, Connecticut excepted, taken), for the sale of the "Eureka Button Fasteners," Patented 1876. No tool required to put them on. Samples, etc., free. W.L. URANN, M'f'r, 21 Fulton St., New York.

ENGINES AND BOILERS.

New and complete. One 2-horse power, $140: 3 H.P., $175; 5H. P., $250; 10 H.P., $500; 25 H.P., $1,000; all sizes in proportion. Patterns, drawings and models best and cheapest of any. Address POND 187 Grand St. N.Y.

Founded by Mathew Carey, 1785.

BAIRD'S SCIENTIFIC BOOK CATALOGUES Now Ready, New Revised Editions.

Of our valuable SCIENTIFIC BOOK CATALOGUES, which will be sent by mail gratis, and free of postage, on application.

We are now receiving and keeping in stock the most important ENGLISH AND AMERICAN SCIENTIFIC BOOKS as they are published, and are prepared to furnish them or to give information in regard to all American and Foreign publications in this department of literature.

HENRY CAREY BAIRD & CO.,

Industrial Publishers, Booksellers & Importers, 810 Walnut Street, Philadelphia.

AIR COMPRESSORS

FOR ALL PURPOSES.

A SPECIALTY of HEAVY PRESSURES.

THE NORWALK IRON WORKS CO., SOUTH NORWALK, CONN.

OTIS' SAFETY HOISTING MACHINERY.

OTIS BROS. & CO., No. 348 Broadway, New York.

THE UNION IRON MILLS, Pittsburgh, Pa., Manufacturers of improved wrought iron Beams and Girders (patented).

The great fall which has taken place in the prices of Iron and especially in Beams used in the construction of FIRE PROOF BUILDINGS, induces us to call the special attention of Engineers, Architects, and Builders to the undoubted advantages of now erecting Fire Proof structures; and by reference to pages 52 & 54 of our Book of Sections - which will be sent on application to those contemplating the erection of fire proof buildings - THE COST CAN BE ACCURATELY CALCULATED, the cost of Insurance avoided, and the serious losses and interruption to business caused by fire; these and like considerations fully justify any additional first cost. It is believed, that were owners fully aware of the small difference which now exists between the use of Wood and Iron, that in many cases the latter would be adopted. We shall be pleased to furnish estimates for all the Beams complete, for any specific structure, so that the difference in cost may at once be ascertained. Address

CARNEGIE, BROS. & CO., Pittsburgh, Pa.

Arsenic In The Arts

A Lecture before the Medical Association of Central New York. By S.A. Lattimore, LL.D., Professor of Chemistry in the Rochester University. A popular and important paper. scientific american supplement No. 29. Price, 10 cents. To be had at this office and of all newsdealers.

A NEW DEPARTURE.

Traveling and local salesmen wanted. STAPLE GOODS. NO PEDDLING. Salary $75 a month. Hotel and traveling expenses paid, S.A. GRANT & CO., manufacturers of ENVELOPES and PAPER. 2,4, 6, and 8 Home St., CINCINNATI, OHIO

$66 a Week in your own town. Terms and $5 outfit free. H. HALLETT & CO., Portland, Maine.

MESSRS. B. DAMBACHER & CO., Hamburg, Germany dealers in American Wood-Working Machinery and Tools of all kinds. Messrt. D. & Co., solicit consignments from American manufacturers. Catalogues and descriptive circulars desired, by mail.

MACHINERY

OF EVERY DESCRIPTION,

COLD ROLLED SHAFTING, HANGERS, PULLEYS, COUPLINGS, BELTING, TANITE EMERY WHEELS AND GRINDERS, IN STOCK.

GEORGE PLACE,

121 Chambers & 103 Reade Sts., New York City.

$10 to $500 INVESTED IN WALL ST.

Often leads to wealth. A 72 page book explaining everything, and a copy of the Wall Street Review, sent free.

JOHN HICKLING & CO.,

Bankers and Brokers 72 Broadway, New York

WE ENAMEL

in FINE JET BLACK every variety of turned woodwork parts of machinery, casting's, tinware and other metalwork, ENAMELED JET GOODS, in wood or metal, made to order. AMERICAN ENAMEL CO. 17 WARREN ST., PROVIDENCE, R.I.