Jules Violle
Physicist, Academic
1841 – 1923
Who was Jules Violle?
Jules Louis Gabriel Violle was a French physicist and inventor.
He is notable for having determined the solar constant at Mont Blanc in 1875, and, in 1881, for proposing a standard for luminous intensity, called the Violle, equal to the light emitted by 1 cm² of platinum at its melting point.
Throughout his life, Violle taught at several colleges including the University of Lyon and the Conservatoire des Arts et Métiers in Paris. He was one of the founders of the Institut d'optique théorique et appliquée and the École supérieure d'optique. He improved and invented a number of devices for measuring radiation, and determined the freezing and melting points of palladium.
Violle is believed by some to be the secret identity of Fulcanelli, a contemporary French alchemist whose true identity is still debated. You can find his biography with this book "A l'ombre des chênes, l'alchimiste de la République
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