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Title: Westinghouse red-sensitive photo-electric cell, type P.A.1 [Go to resource]
Description: Westinghouse red-sensitive photo-electric cell, type P.A.1 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1933-568 Go to resource More Like this...-
Westinghouse green-sensitive copper-oxide…Westinghouse green-sensitive copper-oxide photo-electric cell
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