=Prices largely Reduced.= ---------------------------------------------------------------------- [Illustration: WATSONS NON CHANGEABLE GAP LATHE HAS GREAT FACILITIES FOR LARGE OR MEDIUM SIZE WORK JAMES WATSON MANR. 1608 S. FRONT ST. PHILA. PA.] ---------------------------------------------------------------------- HARTFORD STEAM BOILER Inspection & Insurance COMPANY. W. B. FRANKLIN V. Pres't. J. M. ALLEN, Pres't. J. B. PIERCE, Sec'y. ---------------------------------------------------------------------- [Illustration] =Patent Portable Chuck Jaws.= Improved Solid Emery Wheels, for grinding Iron and Brass Castings, Tools, etc. Manufactured by AM. TWIST DRILL CO., Woonsocket, R. I. ---------------------------------------------------------------------- =$7= A DAY to Agents canvassing for the =Fireside Visitor=. Terms and Outfit Free. Address P. O. VICKERY, Augusta, Maine. ---------------------------------------------------------------------- =HAND SAW MILL= SAVES THREE MEN'S labor. S. C. HILLS, 78 Chambers St., N. Y. ---------------------------------------------------------------------- =BEST= DAMPER REGULATORS AND WEIGHTED GAUGE COCKS. MURRILL & KEIZER, 44 HOLLIDAY ST., BALTIMORE. ---------------------------------------------------------------------- [Illustration: PATENTS] =CAVEATS, COPYRIGHTS, TRADE MARKS, ETC.= Messrs. Munn & 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 have had OVER THIRTY 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 Mark Regulations, 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 moderate terms. We send free of charge, on application, a pamphlet containing further information about Patents and how to procure them; directions concerning Trade Marks, Copyrights, Designs, Patents, Appeals, Reissues, Infringements, Assignments, Rejected Cases, Hints on the Sale of Patents, etc.