Sounding machine devised by Robert Hooke

Sounding machine devised by Robert Hooke. Drop glass ball with weight over side. Ball disengages when weight hits bottom. Known rate of descent and ascent - can then derive depth. Never worked right.

Photo Category: Charting - Soundings - Bathymetry - Mechanical

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Author: NOAA Central Library/ NOAA

License: Public Domain Mark 1.0 (Public domain)

Small	419 x 640	50.65 KB
Original	1068 x 1632	486.43 KB

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Added On	19th October 2015
Viewed	8 viewed