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Hair Hygrometer
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
Brass hygrometer with silvered scale inscribed "Fortin et Hermann, Genve. [?] à Paris" and "Humidité" (humidity) and "Secheresse" (dryness). Nicholas Fortin, the senior member of this firm, was an instrument maker well known for his improved mercury barometer. The U.S. Military Academy bought this example in the early 1830s.
National Museum of American History’s own descriptionSubjects
Credit lineHair Hygrometer. ca 1829. Fortin et Herrmann. National Museum of American History, U.S. Military Academy. CC0.
