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Title: Lightmeter, photovoltaic type, by The Benjamin Electric Ltd, [Go to resource]
Description: Lightmeter, photovoltaic type, by The Benjamin Electric Ltd, Tottenham, London, England, ranges 0-25 and 0-125 foot-candles License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1992-512 Go to resource More Like this...
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