MESSRS. MUNN & CO. In connection with tbe pub Iication of the ScieNtiFic Ambbican, continue to examine Improvements, and to act as Solicitors 01 Patents for Inventors. In this line of business they have had thirty-eight year8' experience, and now have mwqrualed facilities for the preparation of Patent Drawings, Specifications, and 'he prosecution of Applications for Patents in the United States, Canada, and Foreign Countries. Messrs. Mllun & Co. also attend to the preparation of Caveats, Copyrights for Books. Lahels, Reissues, Assignments, and Reports on Infringements of Patents. All business Intrnsted to them i8 done with special care and promptness, ou very reasonable terms. A pamphlet sent free of charge, on application, con taining full information about Patents and how to pro-cnre them; directions concerning Labels, Copyrights, Designs. Patents, Appeals. Reissues, Infringements, As lignments, Rejected Cases, Hints on the Sale of Patents, etc. We also send. free Q' charge, a-Synopsis of Foreign Patent Laws, showing the cost and method of securing patents in all the prinCipal countries of the world. NN & CO., SolleUon of Patents, 361 Broadway, New York. BRANCH OFFICE.Corner of F and Ilh Streets, WssniDgloD, D. C.