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Figure 62

Figure 62. Breguet-Saxton metallic thermometer first invented about 1817 by the instrument maker Louis Abraham Breguet. The first of this type was composed of platinum, silver, and gold with the silver placed in the center. Differential expansion of the metals provided the temperature measurement. In 1848, Joseph Saxton made a similar one for the U. S. Coast Survey but it was inaccurate.

Photo Category: Oceanography

Author: Y. Berard/Oceanographic Museum of Monaco/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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18th October 2015
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