MESSRS. MUNN & CO., in connection wth the publication of the SCIENTIFIC AMERICAN. continue to examine improvements. and to act as Solioitors of Patents for Inventors. In this line of bussiness they have had forty-one years Experience, and now have Unequaled facilities for the preparation of Patent Drawings,-Specifications, and the proBecution of Applications Patents in the United States, C..ada. and F,orelgn Countries. Messrs Munn & Co. also attend to thepreparation of Caveats, Copyrights for Bootes. Labels, Reissues. AssiRnments, and Reporte on InfrinKents of Patents. AU business ' intrusted: to them is done -with special and promptness, on verj reasonable terms A pamphlet sent l'fee of charge. on application. con taining full information about Patents and how to procure them; directions oonrarning Labels, Copyrights, Designs, Patents, Appeals. Reissues, Inlrlngemnts, As-Bignments, Rejected Cases, Hints on the Sale of Pa-ta, et", ' We als d, frMO/ c. a Synopsis of Foreign Patent Law.. showing the Mt and method of securing patents In all the principal countries of the world. ltITJNN (JO., 8ollclrB ol Patents, ' /361 Br, New York. BRANCH OlOES.-No. = and rU F Strt, Pa Office Building near the Street, Washington, D.C.