Sonargraphs, Charles River (Boston, MA) - John M. Pogue, 1962

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Description: (curated)

Man unrolls a long sonargraph, labeled "Boston Harbor July 4 1962, H. Edgerton, J. Pogue, Range 80', 0.25 MFD x100 Alden 80" (instrument parameter details); another sonargraph nearby is labeled "Charles River, July 4 1962, J. Pogue, Scale 80 ft, 05 MFD DAMPED, x100, Alden 4". (CC).

HEE-SC-00465

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