Testing Equipment at Engineering Society Building, 29 West 39th Street, New York City, 1939

safety negative

PHOTOGRAPHS - SOFT NEGATIVES
Rosenfeld and Sons
USA, NY, New York
1939-02-01
8 x 10 x 0 in.

8x10 safety negative photographed by Rosenfeld and Sons on February 1, 1939. Image of testing equipment at Engineering Society Building, 29 West 39th Street, New York City. Visible in image: two men, one from 1984.187.54529 aiming a speaker horn on a tripod, the other adjusting the ampmeter connected to machinery, speaker horns of different sizes and blackboard with "Horn Gains Re λ/2 Ant." chart and drawing set up on stage with stage curtain in background, a "MICROAMPERES D.C." gauge set up in front of stage. CREDIT LINE: Mystic Seaport, Rosenfeld Collection. Typed on original negative sleeve: “54530 2/1/39 / 2531-16 / Bell Tel Lab-463 West St City / Mr P B Findlay, Room 1101 Equipment at Eng Soc Bldg 29 W 39th St“.

1984.187.54530

Mystic Seaport, Rosenfeld Collection