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Keywords from Image Description:
PSM The violle actinometer. The Violle actinometer Violle actinomtre de Jules Violle sert dterminer approximativement la temprature de la surface du Soleil Jules Violle tait un physicien connu pour ses travaux sur la photomtrie le rayonnement et la calorimtrie Il publia de nombreux articles sur la dtermination de la temprature