pl23_theb3774.jpg
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
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