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NOAA Photo Library Image - ship4296

Figure 13. Negretti and Zambra thermometer, 1878 model. This instrument is the direct ancestor of most reversing thermometers used up to this time. This was the first instrument to break the column of mercury after reversing to obtain the reading. It was entirely enclosed in a double envelope of glass to eliminate pressure effects.

Image ID: ship4296, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco

Category: Oceanography/Historical instruments/

High Resolution Photo Available





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April 30, 2013