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Title: Photoectric cell c. 1915 (probably by GEC) [Go to resource]
Description: Photoectric cell c. 1915 (probably by GEC) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1910-1920 Source: Science Museum Identifier: 1983-82 Go to resource More Like this...
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