Accession Number: 1984.187.24641.1
Title: Transatlantic Radio Telephone Measurement chart, 1923
Overall Size: overall: 8 x 10 in.; 20.32 x 25.4 cm
Date Created: 1923-03-04
Photographer: Rosenfeld and Sons
Description: 8x10 gelatin silver print from 8x10 safety negative taken by Rosenfeld and Sons on March 4, 1926. Image of AT&T Transatlantic Radio Telephone Measurements Chart. Visible in image: "Transatlantic Radio Telephone Measurements / Diurnal Variation of Percentage of Disconnected Words Understood / Typical Winter Day -1923 / Typical Summer Day~1923", chart with x representing Greenwich Mean Time and Eastern Standard Time and y representing % Disconnected Words Understood.
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