shing brick, sand and stone required for lock engravings. Contained in SCIENTIFIC AMERICAN SUPPLEMENT, No. 759. Price 10 cents. To be had at and movable dam No. 6, Ohio River, near Beaver, Pa., this office and from all newsdealers. will be received at this office until 2.30 Bi m., August 16, SEND… … it jnst as resented F EE Send cash with ELECTRO MOTOR. SIMPLE. HOW TO The BILLINGS & SPENCER CO., Hartford, Conn, order, thus sav- NOW READY! ing us the return ex- make. ByG.M.Hopkins.—Description of a small electro press expense Of mon- motor devised and constructed with a viewto assisting ey and…
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