pl23_ship4296.jpg
Description
Figure 13. Negretti and Zambra thermometer, 1878 model. This instrument is the direct ancestor of most reversing thermometers used up to this time. This wasthe first instrument to break the column of mercury after reversing to obtainthe reading. It was entirely enclosed in a double envelope of glass toeliminate pressure effects.
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