Messrs. Munn Co., in connection with the publication of THE SCIENTIFICcontinue to examine Improvements, and to act as Solicitors of Patents for Inventors. In this line of business they have had over THIRTY-FIVE YEARS EXPERIENCE, and now have unequaled facilities for the preparation of Patent Drawings Specifications, and the prosecution of Applications for Patents in the United States, Canada, and Foreign Countries. Messrs. Munn Co. also attend to the preparation of Caveats, Trade Marks, 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.cha:je, a Synopsis of Foreign Patent Laws, showing the cost and method of securing patents in all the principal countries of the world. MTJNN CO., Solicitors of Patents, 261 Broadway, New York. BRANCH OFFICE-Corner of F and 7th Streets, Washington, D. C. MESSRS. MUNN & CO., in connection with the puh. lication of the Scientific American, continne to examine Improvements, and to act as Solicitors of Patents for Inventors. In this line of busines'" they ha ve had th tOr t y ..flve year8' experience, and now have vnequaled facilities for the prcparation of Patant Drawings, Specifications, and t h e prosecnt l' On af App r.catl'Ons f or 'patents l ' the Um. ted States, Canada, and Fore1gn Countr1es. Messrs. Munn & Co. also attend to the preparation of Caveats, C opy.rl'g h ts f or B 00k. s, L ab e1 s, R el. ssues, AsSl'gnment S, and Reports on Infrmgements of Patents. All bUSllCSS 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 ahont Patents and how to procure them; directions concering I,abe]s, Copyrights, Designs, Patents, Appeals, Reissnes, II'fringements, Assignments, Hejected Cases, Hints on the Sale of Patents, etc. We also send, free Of charle, a Synopsis of Foreign Patent Laws, showing the cost and method of secning patents in all the principal counlries of the world. MUNN & CO., Solidtors of Patents, 261 Broadway, New York. BRANCH OFFICE -Corner of F and 7th Streets, WaShington, D. C.