MESSRS. MUNN & CO., in connection with the publication oJ the scientific american, continue to ex-ane iitroTement8, and to act as Solicitors of Patents ItttlBfl Bne of busfflcss they have bad mtii-cw years experit. and now nave uneqimled fatiUUes fpr the preparation of Patent Drawings, Specitlcations, dnd the prosecution of Applications for Patents in the' United states, Canada, and Foreign Countries. Messrs Munn & Oo. alsoattend to thepreparation of Caveats. Copyrights for Books, Labels, Reissues, Assignments, and Reports on Infringements of Patents. AU 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, jreeof chwrge, a Synopsis of Foreign Patent Laws, showing the cost and method of securing patents in all the principal countries of the world, nUNN & CO., Solicitors ol Patents, 361 Broadway, New York, BRANCH OFFICES.--No. 622 and 624 F Street, Pa. oiflo Bnildlng, near 7tb Street, Waahlngion, D. C.