REDUCED PRICES. Set Iron Dogs, 3-8 to 2 in., - - - - - $5.60 " " " 3-8 to 4 in., - - - - - - 12.00 " Steel " 3-8 to 2 in., - - - - - 6.30 " " " 3-8 to 4 in., - - - - - - 13.00 Iron & Steel Clamps, Die Dogs, Clamp Dogs, Vice Clamps, Expanding Mandrels, &c. Send for latest Price List to C. W. LE COUNT, South Norwalk, Conn. WORKING MODELS And Experimental Machinery, Metal or Wood, made to order by J. F. WERNER, 62 Center St., N. Y. [Illustration: Patents] PATENTS CAVEATS, COPYRIGHTS, TRADE MARKS, ETC. Messrs. Munn & Co., in connection with the publication of the SCIENTIFIC AMERICAN, continue to examine Improvements, and to act as Solicitors of Patents for Inventors. In this line of business they have had OVER THIRTY YEARS' EXPERIENCE, and now have _unequaled facilities_ for the preparation of Patent Drawings, Specifications, and the Prosecution of Applications for Patents in the United States, Canada, and Foreign Countries. Messrs. Munn & Co. also attend to the preparation of Caveats, Trade Mark Regulations, Copyrights for Books, Labels, Reissues, Assignments, and Reports on Infringements of Patents. All business intrusted to them is done with special care and promptness, on very moderate terms. We send free of charge, on application, THE SCIENTIFIC AMERICAN HAND BOOK, an elegantly illustrated pamphlet of 48 pages, containing further information about Patents and how to procure them; directions concerning Trade Marks, Copyrights, Designs, Patents, Appeals, Reissues, Infringements, Assignments, Rejected Cases, Hints on the Sale of Patents. _Foreign Patents._--We also send, _free of charge,_ a Synopsis of Foreign Patent Laws, showing the cost and method of securing patents in all the principal countries of the world. American inventors should bear in mind that, as a general rule, any invention that is valuable to the patentee in this country is worth equally as much in England and some other foreign countries. Five patents--embracing Canadian, English, German, French, and Belgian --will secure to an inventor the exclusive monopoly to his discovery among about ONE HUNDRED AND FIFTY MILLIONS of the most intelligent people in the world. The facilities of business and steam communication are such that patents can be obtained abroad by our citizens almost as easily as at home. The expense to apply for an English patent is $75; German, $100; French, $100; Belgian, $100; Canadian, $50. Address MUNN & CO., 37 Park Row, New York city. PYROMETERS, For showing heat of Ovens, Hot Blast Pipes, Boiler Flues, Super-Heated Steam, Oil Stills, &c. HENRY W. BULKLEY. Sole Manufacturer, 149 Broadway, New York. $5 Outfit free. Salary guaranteed. Write at once to EMPIRE NOVELTY CO., 309 Broadway, New York. TAYLOR'S M'F'G CO., WESTMINSTER, MD., Portable and Stationary Engine Builders, etc. Send for Cata. STEAM PUMPS Wright's Pat. Bucket Plungers are the best. VALLEY MACHINE Co. Easthampton, Mass.