Digital Library Search
![Figure 40 ship4242.jpg Figure 40](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4242.jpg?itok=C3QfZa5h)
Description
Figure 40. Fol bathometer, designed by Hermann Fol who was a collaborator withPrince Albert I of Monaco. This instrument used the same principle as the Ericsson sounder. Fol replaced water with mercury in order to determine the depthattained as a function of the quantity of liquid displaced by the pressure.Details concerning tests and effectiveness of this device are unknown. (Image credit: Oceanographic Museum of Monaco | Y. Berard)