SEWING MACHINE MOTOR. Brayton Ready Motor. 132 N. 3d St. Philadelphia Pa. film & Co.'s Patent Oleos. The Oldest Agency for Soliciting Patents in the United States. Copies of Patents. MUNN & CO. 37 Park Row N. Y. The Tanite Co. STROUDSBURC PA. EMERY WHEELS& GRINDERS Machinists' Tools. Lathes Planers Drills &c. M. SELIG JUNIOR & CO. PORTLAND CEMENT PREPARATORY SCIENTIFIC SCHOOL H. W. JOHNS 87 Maiden LaneN.Y. HARTFORD Inspection & Insurance COMPANY. N 0 Y E' S Mill Furnishing Works THE VALIDITY OF PATENTS. Working Models Portland and lieene's Cement. MIDDLETOWN CONN. [ESTABLISHED 1846. The Supplement. 37 Park Row New York. REYNOLDS & CO. 145 EAST ST. NEW HAVEN CT. MANUFACTURED ONLY BY 50 Niagara Steam Pu m pWorks CHARLES B. HARDICR No. 2 3 Adams Street. BROOKLYN N. Y. Todd & Rafferty Machine Co., scientific american, 1876-09-02
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