| Unidentified photographer/creator Playing Ping Pong to Test New Lighting [O.H. Biggs and W.P. Lowell, Jr.,arranged for several ping pong matches under a huge canopy containing the usual tungsten filament lamps and the latest sodium vapor lamps] 1934 National Museum of American History, Smithsonian Institution © Hygrade Sylvania Corporation - courtesy of Smithsonian National Museum of American History (Science Service Ref: CD 1964099 E&MP27.080) LL/6648
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