Diagram of the Sigsbee Sounding Machine as used on the BLAKE.George Belknap shipped Thomson piano wire machine to BLAKE in 1875Charles Sigsbee modified Thomson machine to make the Sigsbee Sounding Machine. Sigsbee sounding machine was the standard fo
4/8/2019 11:48:09 AM
Date: 1875
Credit: NOAA Central Library
Subject: Charting
Subject: Soundings
Subject: Bathymetry
Subject: Mechanical