and Drying Ma chines and Ma chinesfor making Blue Print Paper. WILLIAMS BROWN & EARLE DIRECT FROM MINES Engineerinz News The The Leading Engineering Paper of the World. For Civil Mechanical Mining and Electrical Engineers 100 to 125 pages 9' z 13' weekly. Send ten cents for sample copy. TNE ENGINEERING NEWS PUBLISNING CO. . 214 Broadway New York NICKEL EleCtro-Plating 7i Home mention the SCIENTIFIC AMERICAN when writing to oilvertkwas, -1909-07-24

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and Drying Ma chines and Ma chinesfor making Blue Print Paper. WILLIAMS BROWN & EARLE DIRECT FROM MINES Engineerinz News The The Leading Engineering Paper of the World. For Civil Mechanical Mining and Electrical Engineers 100 to 125 pages 9' z 13' weekly. Send ten cents for sample copy. TNE ENGINEERING NEWS PUBLISNING CO. . 214 Broadway New York NICKEL EleCtro-Plating 7i Home mention the SCIENTIFIC AMERICAN when writing to oilvertkwas, -1909-07-24

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