MESSRS. MUNN CO.. in connection with the publication of the SCIENTIFIC AMICRICAN, continue to examine Improvements, and to act as Solicitors of Patents for Inventors. In this line of business they iiave had thirty-tigM years' experience, and now have mequaled faculties for the preparation of Patent Drawings, Specifications, and the prosecution of Applications for Patents in the 'united States, Canada, and Foreign Countries. Messrs. Mmin 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, As-eignments, Eejected Cases, Bints on the Sale of Patents, etc. We also send, free a' charge, a Synopsis of Foreign Patent Laws, showing the cost and method of securing patents in all the principal countries of the world, MUNN ?- CO., Solicitors of Patents, 361 Broadway. New ??#, BRANCH OFFICE.--Comer or F and 7th Streets, Washington. D. C.