pl23_ship4289.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23ship4289jpgDescription
Figure 9. Walferdin maximum temperature thermometer a form of reversing thermomter designed by Francois Walferdin, a French customs official who was responsible for in 1855.
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
Thermometers and Other Temperature Measuring Equipment
Keywords
Oceanography
Historical instruments