HOWSON & SON'S OFFICES FOR PROCURING United States and Foreign Patents AND PROSECUTING PATENT CAUSES. Principal Office, 119 South Fourth Street, Philadelphia. Branch Office, 605 Seventh St., Washington, D.C. Authors of "The American Patent System," "Our Country's Debt to Patents," "Answers to Questions of the State Department Relating to Patents Jan. of a "Brief Treatise on Patents," published by Porter & Coates. ,1 yr. Also, RUDOLPH M. HUNTER, M.E., C.E., CONSULTING ENGINEER AND SOLICITOR -OF UNITED STATES & FOREIGN PATENTS Expert in the Trial of Patent Causes. Machinery Designed and Working Drawings Prepared. Examinations in regard tɔ the validity and Infringement of Patents. REJECTED CASES A SPECIALTY. Main Offices, 901 Walnut Street, Send for illustrated book on Patents, free. Jan. '81 ly PHILADELPHIA. WATER-TUBE STEAM BOILER Centennial Exposition Medal awarded this Boiler for Highest Economy and Efficiency on Test. 4069 H. P 3790 The following are a few of the parties having these Boilers in use in large lots: Singer Manufacturing Company, New York, 22 orders, Harrison, Havemeyer & Co., Philadelphia, 6 orders, Decastro & Donner Sugar Refining Co., Brooklyn, 6 orders, 2980 Matthiessen & Weichers, Jersey City, 4 orders, Brooklyn Sugar Refining Company, Brooklyn, 2 orders, 1500 Chicago City Railroads, 3500 1000 M. Grambrill & Co., Cotton Mills, Wilmington, Del., The Jessup & Moore Paper Co., Wilmington, Del., 3 orders, 1350 500 Standard Oil Refinery, New York, 6 orders, North Bend Plantation, Louisiana, 2 orders, 1600 400 South Bend Iron Works, South Bend, Ind., 2 orders, U. S. Electric Light Company, New York, 3 orders, And hundreds of others in all kinds of business from 50 to 1000 H. P. each. Illustrated Circulars and other information desired furnished promptly. The Babcock & Wilcox Co. 30 CORTLANDT ST., NEW YORK. 48 S. Canal St., Chicago. june '81 17. 32 N. 5th St., Philad'a. |