This photograph (111-SC-2619) depicts a SCR apparatus, specifically an direct reading wave meter. It was taken and received by the subject photographer on March 5, 1918. The apparatus is intended for use in the laboratory and is not meant for publication. These are the accompanying laboratory notes.

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Size: 7982px × 6302px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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