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 fmy years pmence, and now have unequalled faciliUes for the preparation of Patent Drawings, Specifications, and the .prosecution of Applications for Patents in the United States, Canada, and E'oreign 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 chharge, a Synopsis of Foreign Patent Laws, showing the cost and method of securing patents In all the principal countries of the world. ltIUNN ok CO., Solicitors of Patents, 361 Broadway. New York. BRANCH OFnCE.-Co^ner of F and 7th Streets. WttJhl^ton, D. C.