The Otto Gas Engine Wks., Incorp’d, Philadelphia TRUSCOTT BOAT MFG. CO., SCIENTIFIC AMERICAN SUPPLE- New Inventions, Novelties in Mechanics, Manufactures, MENT. Any desired back number of the SCIENTIFIC Chemistry, Electricity, Telegraphy, Photograpby, Archi- Drawer D. ST. JOSEPH, MICH., U. S. A.…
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