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#7170 American 18th century thermometer
SOLD American thermometer, hand engraved silvered brass scale with Reaumur-mercury-thermometer, in french language.
Signed: Donagan & Co, Philadelphia.

Donegan is mentioned in 'Early American Scientific Instruments and their Makers' by Silvio Bedini.
http://www.gutenberg.org/files/39141/39141-h/39141-h.htm

Information about French speaking in the Philadelphia area can be found here:
http://philadelphiaencyclopedia.org/archive/french-revolution/
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American 18th century thermometer
American 18th century thermometer
American 18th century thermometer
American 18th century thermometer
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