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USC&GS George S. Blake c.1870s
USC&GS George S. Blake c.1870s
Sigsbee Sounding Machine – invented by Charles D. Sigsbee and modified from Thomson Sounding Machine. Basic design of ocean sounding instruments staye
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. Note caption on photo: "Sounding Machine And Current Meter in Place, Steamer Blake"
Coast and Geodetic Survey steamer Blake, Washington Navy Yard, c. 1880.
Coast and Geodetic Survey steamer Blake, Washington Navy Yard, c. 1880.
1882 book about the steamer "Blake" by U. S. Navy Lieutenant-Commander Charles Sigsbee
1882 book about the steamer "Blake" by U. S. Navy Lieutenant-Commander Charles Sigsbee
Portrait of Alexander Emanuel Agassiz
Portrait of Alexander Emanuel Agassiz
Agassiz c. 1860
Agassiz c. 1860
Castle Hill Inn, Agassiz's Newport cottage
Castle Hill Inn, Agassiz's Newport cottage