Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 28
l change; andthen, if the position were favorable, it isquite evident that magnetism would beimparted. Indeed, we have found this tobe the case when the needles, exposed tosolar radiations, were placed in the direc-tion of the dip. The supposed magnetiza-tion of li^ht by Faraday has already…
Photography · Art and photography
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