Publisher's Synopsis
Excerpt from Annales de Chimie Et de Physique, 1879, Vol. 18
Dans ses nombreux M�moires sur la Photom�trie Arago a donn� des m�thodes toutes diff�rentes et qui ont �t� souvent appliqu�es. Elles reposent sur la loi de Malus, qu'il avait commenc� par v�rifier. L'application de cette loi conduit � des dispositifs assez diff�rents, suivant le but que l'on se propose nous allons en examiner quelques - uns.
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