SCIENTIFIC AMERICAN No. 31 Broadway. New York NEW YORK SATURDAY JANUARY 20 1906. PIPE GALLERIES IN THE NEW SUBWAY. WE SHOULD USE THE METRIC SYSTEM. ALTERNATIVE SCHEMES FOR THE PANAMA CANAL. ELECTRO-TECHNICAL INDUSTRIES., 1906-01-20
SCIENTIFIC AMERICAN No. 31 Broadway. New York NEW YORK SATURDAY JANUARY 20 1906. PIPE GALLERIES IN THE NEW SUBWAY. WE SHOULD USE THE METRIC SYSTEM. ALTERNATIVE SCHEMES FOR THE PANAMA CANAL. ELECTRO-TECHNICAL INDUSTRIES., 1906-01-20
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