Mr. George Wood, Wood's Museum and Menagerie, respectfully and earnestly invites the attention of Inventors and Manufacturers to the fact that, at a large expense, he has arranged a hall in the Museum Building, for the purpose of exhibiting to the public Models, Machines, and all the products of inventive genius in active working operation. The space allotted for this purpose embraces 6,000 square feet, supplied with Steam-power, Gas, and all the requirements of the Workshop, the Factory, and the Laboratory, which will be kept open every day and evening, and form a perpetual MECHANICS' FAIR, affording an opportunity to Inventors and Mechanics to place their products before thousands of daily visitors at a nominal tariff. Inventors and Mechanics are earnestly invited to co-operate in this laudable and advantageous enterprise, and are requested to call on or address MR. WALTER P. NEWHALL, Superintendent of Machinery and Models. GEO. WOOD, Proprietor. Office at Wood's Museum, corner Broadway and 30th st. * * * * * FRENCH BAND SAW MACHINES, SAWS, Taper Files, etc., Machines for Scroll, Re-sawing, and Log; Mongin & Co.'s Band Saw Blades, all Sizes, on hand and made to order. All Styles of Band Saw Machines in operation at Mahogany Mill, 10th st., E.R. GEORGE GUEUTAL, Sole Agent for the U.S., 39 West 4th st., N.Y. * * * * * _Horsford's Bread Preparation_. The only "baking powder" recommended by Scientific Men. Made under personal supervision of Prof. Horsford, of Harvard University. Restores to fine flour the Phosphates. Refer to S.H. Wales, Scientific American; Dr. Fordyce Barker; Dr. John H. Griscom; Dr. Wm.A. Hammorid (late Surgeon Gen. U.S. Army), Prof. R.O. Doremus, all of New York; Prof. J.C. Booth, Prof. S.H. Dickson, Philadelphia, etc. Liebig & Horsiord's Essay on Bread Making sent free. WILSON, LOCKWOOD, EVERETT & CO., 201 Fulton st., New York, General Agents. * * * * * STURDEVANT'S FAN BLOWERS, _Pressure Blowers_, THE BEST FOR ALL PURPOSES. _Judson's Governors_. THE ONLY RELIABLE. JAS.L. HAVEN & CO., Cincinnati, Ohio, Agents for the above standard, articles. * * * * * _Oak Leather Belting_. Manufactured Dy CHAS. A. SCHIEREN, 92 Gold st., N.Y. * * * * * SCHLENKER'S PATENT BOLT CUTTER NEW INVENTION. ADDRESS. HOWARD IRON WORKS. BUFFALO. N.Y. * * * * * [Illustration] Reynolds' Turbine Water Wheels. No Complex, Duplex, or Triplex complications. All such are costly, perishable, easily clogged, inaccessible. Mill Gearing, Shafting, and Pulleys. Send for Illustrated Pamphlet. GEORGE TALLCOT, 96 Liberty st., New York. * * * * * STEAM ENGINES & BOILERS