WALFERDIN (François, Hippolyte) - Lot 291

Lot 291
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80 - 100 EUR
WALFERDIN (François, Hippolyte) - Lot 291
WALFERDIN (François, Hippolyte) (1795-1880) French physicist. Founder of the French Geological Society. Autograph letter signed Paris, December 1, 1856. 2 pages small in-4. Addressed to Dr. Ossian Henry. With address, stamp and postmarks. Scientific letter - thermometry and hot springs Walferdin proposes a meeting with his correspondent and discusses his work: "...the various systems of instruments which I have proposed to employ for the observation of the temperature of thermal springs..." He also explains: "I have dealt extensively with the question of thermal springs in the thermometric report and in the geological reports..."
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