pl23_ship4244.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23ship4244jpgDescription
Figure 42. Hopfgartner and Arzberger sounder, devised by Lieutenant Franz vonHopfgartner of the Austrian Merchant Marine and Moriz Arzberger, a civil engineer, this apparatus used the same principle as aneroid barometers which utilizedthe pressure difference between a wall, isolated or not, and the exterior medium. It was tested in 1876 in the Gulf of Trieste in depths up to 17 meters.
Credit
Oceanographic Museum of Monaco
Photographer
Y. Berard
Collection
Voyage to Inner Space
History of Oceanography Collection
The Early Instruments - Collections of the Oceanographic Museum at Monaco
Sounding Instruments
Keywords
Oceanography
Historical instruments