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![Sounding device made by William P theb3774.jpg Sounding device made by William P](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb3774.jpg?itok=pq5t0PV5)
Description
Sounding device made by William P. Trowbridge for Coast Survey.Line would pay out of a descending cylinder and stationery cylinder on deck.Similar to modern bathythermograph copper wire instrument.Civil War intervened stopping research.Probably would have worked (Image credit: NOAA Central Library )
Credit
NOAA Central Library
Display Date
1860
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Bathymetry - Mapping the Features
Pre-1920
Keywords
Charting
Soundings
Bathymetry
Mechanical