PHOTOGRAPHING THE NEW YORK SUBWAY. THE 54000 CANDLE POWER COOPER HEWITT MERCURY ARC LAMPS. PHOTOGRAPHING THE NEW YORK SUBWAY. -40 4 B 41B, scientific american, 1905-07-01
PHOTOGRAPHING THE NEW YORK SUBWAY. THE 54000 CANDLE POWER COOPER HEWITT MERCURY ARC LAMPS. PHOTOGRAPHING THE NEW YORK SUBWAY. -40 4 B 41B, scientific american, 1905-07-01
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