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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 forty one year,and now have uneaz 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, 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 reasonable terms. A pamphlet sent free of charge, on application, containing full information about Patents and how to procure them; directions concerning Labels, Copyrights, Designs, Patents, Appeals, Reissues, Infringements, Assignments, Rejected Cases, Hints on the Sale of Patents, etc. 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. MlINN CO., Solicitors of Patents, 361 Broadway, New York. BRANCH OFFICES.:'-No. 622 and 624 F Street, Pacific Building, near 7th Street, Washington, D. C. Scientific American Supplement. This is a separate and distinct publication from The Scientific American, but is uniform therewith in size, every number containing sixteen large pages. The Scientific American Supplement is published weekly, and includes a very wide range of contents. It presents the most recent papers by eminent writers in all the principal departments of Science and the Useful Arts, embracing Biology, Geclogy, Mineralogy, Natural History, Geography, Archffiology. Astronomy, Chemistry, Electricity, Light. Heat, Mechanical Engineering, Steam and Railway Engineering, Mining, Ship Building, Marine Engineering, Photogrnphy, Technology, Manufacturing Industries, Sanitary Engineering, Agriculture, Horticulture, Domestic Economy, Biography, Medicine, etc. A vast amount of fresh and vauable informatics pertaining to these' and allied subjects is given, the whole profusely illustrated with engravings. The moti important Engineering Works, Mechanisms, and Manufactures at home and abroad are represented and described in tbe Supplement. Price for the Supplement for the United States and Cahada, 5.00 a year, or one copy of the Scientific American and one copy of the Supplement, both mailed for one year for 7.00. Address and remit by postal order. express money order, or check, MUNN&Co.. 361 Broadway, N. Y., Publishers Scientific Ameutcan. To 1'oveiern lSubscvibers.--Under the facilities of the PostalUnion,the Scientific American is now sent by post direct from New York, with regularity, to subscribers in Great Britain. India, Australia, and all other British colonies; to France, Austria, Belgium, Germany, Russia, and all other European States; Japan, Brazil, Mexi
