Engraving depicting a Breguet's thermometer. A Breguet's thermometer, also called a spiral thermometer, is a type of thermometer which uses the expansion of metal under heat to produce a measurement more sensitive, and with a higher range, than both mercury and air thermometers. Dated 19th Century

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Size: 4424px × 4741px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

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