The info on Jules Violle is not as in depth as I would like. I found this on a fulcanelli site (translated; originally in french):
VIOLLE (Jules), French physicist, born in Langres in 1841, died in Fixin, meadows of Dijon, in 1923.
Former pupil of the higher Teacher training school of Paris, it took the rank of science doctor in 1870; he was a successively professor with the Faculty of Science of Lyon (1883), then lecturer at the higher Teacher training school (1890).
In 1891 he was also a professor with the academy of arts and trades. He proposed the standard of light which bears its name (1881). He invented, in 1882, the calorimétre with cooling, whose principle led to the manufacture of the insulating bottles. One owes in Violle a new theory of the geysers; research on the origin of hail, and the means of fighting it; the exploration of the atmosphere by sounding-balloons.
Member of the Academy of Science in 1897, Fizeau. Let us quote its Treaty of physics, which made authority; also its beautiful experiments on the temperature of the sun, and the determination of the mechanical equivalent of heat.
Jules VIOLLE had five wire, James (born in 1876), Bernard, (born in 1877), Louis, (born in 1881), Henri (born in 1882) and Gabriel, (born in 1888).
Henri was a doctor and James Intendant General of the Armies.
For memory:
VIOLLE (STANDARD), source of light consisted a square centimétre of the surface of a bath (platinum in fusion radiating normally at the temperature of solidification: The Violle standard is worth 20 decimal candles.
I join hereafter an extract of works of Jules Violle, being able to be consulted with the National Library of France
Type: printed text, monograph
Author (S): Violle, Jules (Louis-Jules-Gabriel)
Titrate (S): J. Violle,… Role of physics to the war. Future of our physical industries after the war… [Printed Text]
Publication: Paris-Nancy: Shepherd-Levrault, 1915
Material description: In-12, 92 p..
Note (S): Conferences made with the Academy of arts and trades in Paris, on December 10, 1914 and February 11, 1915. - Pages of history 1914-1915, n° 66
Note n°: FRBNF31589958
Type: printed text, monograph
Author (S): Violle, Jules (Louis-Jules-Gabriel)
Titrate (S): A forwarding in Mont Blanc, by Mr. Jules Violle… [Printed Text]
Publication: Paris: impr. J. Claye, 1875
Material description: In-8°, 15 p.
Note (S): Extract of the “Review of the Two Worlds