Scientific American 1920 to 1929

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1921-09-10: the man testing labratory where expanding energy is measured1921-09-17: Crossing the Granite Gorge Bridge Which Spans the Coloroda River1921-09-24: Assembling a Huge Condenser Unit for a Steam-Electric Power Plant1921-10-01: Fire Control Platform U.s.s Pennsylvania As Seen From the Brooklyn Bridge1921-10-08: Operating a Huge Camera in the Reproduction of Maps.1921-10-15: MAN MADE LIGHTNING: ONE MILLlON.VOLT SPARK CRASHING ACROSS A NEEDLE GAP - Last weekly issue. Nov. issue coming out October 20.2010-11-01: FIRST MONTHLY ISSUE - The Steady Hand And the Watchful Eye: in the Cab of An Electric Locomotive1921-12-01: EXTENDING THE CONTRACTOR'S WORKING DAY BY FLOOD LIGHTING
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1921-09-17: Crossing the Granite Gorge Bridge Which Spans the Coloroda River

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