MESSRSMUNN&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 had forty-two years' experience, and now have mitqualtd faeiHtfos for the preparation of Patent Drawings, the Prosecution of Applications fpr 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 done with special care, and promptness, on very reasonable, terms. A pamphlet sent free of charge, on application, eon- tainfng full information about Patents and how to procure them; directions concerning Labels, Copyrights, Qesig UP, Patents, Appeals, Reissues, Infringements.