MUNN&CO., in connection with the ituUR of the Scientific 1 American, continue to examine improvements, and to act as Solicito of Patent!' for Invento. In this line of business they have bad forty-h'e yea' exPerxmcc, and now have immn-niwl facilities for the preparation of Patent Drawings. Specifications, and the orosecution of Applications for Patents ill the United ::;tates, Canada, and Foreign Countries. mess, 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 i>amphlet sent free of charge . on application, containing full information about Patents and how to procure toem; directions concerning Labels, Copyrights, Designs, Patents, Appeals, Reissues, Infringements. Assignments. Rejected Cases. Hints on the sale 01 Patents, etc We also send, f,u of charrye, a Synopsis of Foreljra Patent Laws, showing the cost and method of securing Patents in all the principal countries of the world. CHUNK&CO., Solicito of Patents. 361 Broadway. New York. BRANCH OFFICEB.-Noa. 62 and 6U F Street, Pacific Building, near 7th Street, Wl&8htatrton, D. C.