A cheap, portable, yet strong and accurate pair of Pocket Compasses has long been the wish of all whose occupation involves-the use of drawing instruments, such as builders, draftsmen, mechanics, engineers, surveyors, architeots, students, etc. Heretofore all pocket compasses were either too cheap to be specially accurate and durable, or so high in price as to forbid their general use.

Kolesch & Co., 138 Fulton St., New York, have lately placed on the market an instrument which overcomes these drawbacks while it embodies strength, accuracy, durability. The "Indispensable " Combination Drawing Set, as shown in illustration, consists of a pair of dividers, pencil compasses and pen compasses in one piece. As can be seen in the cut, the pen and pencil point are each made integral with one of the steel, points, and each one of these pieces is firmly riveted to one of the legs; it is reversable, so that either the steel point or the pen and pencil point can quickly be brought down on the drawing surface. By this method there are no loose parts or screws, which might get lost, while the instrument is readily ad justed for use. The instrument is made of strong steel bent and braced to make it as rigid as possible. The points are very strong and of an improved style so that they will never lose their adjurtment. When closed the instrument is very compact and weighs only 3/4 oz. The instrument is nicely finished and nickel plated.

It is also furnished in a neat, strong pocket case which also holds a good 5" Ruling Pen. A descriptive circular will be sent on application. The price is 75 cents without drawing pen; $1.25 with pen in pocket case.

The Saw Bench sold by the Frasse Co., 38 Cortland St., New York, is a very necessary tool in all shops where the ripping or sawing of wood is of much account. It is furnished both with foot power and hand crank, and provision is made for cutting thick wood. Two saws are provided for different operations, also an emery wheel, which can be employed for sharpening chisels, plane irons, skates and general grinding. The purchase of one of these machines by a carpenter enabled him to fit a number of doors in a hotel contract that he had taken, and he stated that he was able to do more than fifty times the work than if he had used a hand saw. A descriptive circular will be sent upon request.

Amateur Electricians who have purchased secondary windings from the New England Coil Winding Co. are much pleased with the construction and workings of these coils. They ane just the thing for .amateurs who are interested in electrical experiments requiring coils.

By treating zinc with aluminium in various proportions, nine different well-defined alloys have been obtained.