Annual Report 1860. No. 40 New Form of Dividers Proposed by J.R. Gillis U.S.C.S.
Specimen Cup for Shallow Soundings Devised by Assistant H. Mitchell U.S.C.S.
Image ID: cgs06159, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1860
Credit: United States Coast Survey Annual Report 1860
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