English: Sigsbee Sounding Machine - invented by Charles D. Sigsbee and modified from Thomson Sounding Machine. Basic design of ocean sounding instruments stayed the same for the next 50 years. Here the sounding machine is used to set a Pillsbury current meter at a known depth. In: "The Gulf Stream", by John Elliott Pillsbury, 1891. Call Number GC296.G9 P54 1891. Note caption on photo: "Sounding Machine And Current Meter In Place, Steamer BLAKE"
Date
circa 1880
date QS:P,+1880-00-00T00:00:00Z/9,P1480,Q5727902
Source
National Oceanic and Atmospheric Administration Central Library, Image ID: theb2698, Voyage To Inner Space - Exploring the Seas With NOAA Collection.
{{Information |Description = Sigsbee Sounding Machine - invented by Charles D. Sigsbee and modified from Thomson Sounding Machine. Basic design of ocean sounding instruments stayed the same for the next 50 years. Here the sounding machine is used to s
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