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Title: Electric light switch, 1885 [Go to resource]
Description: early form of double-pole quick-break electric light wall switch, made by Verity. (c.1885) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: electric light switches Temporal: 1885 Source: Science Museum Creator: Verity Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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