National Museum of American History
Hair Hygrometer
Fortin et Herrmann · ca 1829
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.
🔒
Order museum-quality prints
Sign in to order prints, canvas, and more of this work. Browsing and full-resolution downloads stay free.