Thomson piano wire sounding machine as mounted on USS TUSCARORA.This machine was invented by Sir William Thomson, a.k.a. Lord Kelvin.Made use of heavy weight and piano wire - line paid out until weight hit bottom. This machine revolutionized deepsea
4/8/2019 11:48:07 AM
Date: 1873
Credit: NOAA Central Library
Subject: Charting
Subject: Soundings
Subject: Bathymetry
Subject: Mechanical