File:Coulometer in A. Horsfield, "The Faraday and Its Significance in Determining the Fundamental Constants".jpg

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Description
English: Coulometer
Date
Source "Precision Measurement and Fundamental Constants; Proceedings" (1971) Issue 343 United States. National Bureau of Standards p.138, Fig. 1
Author A. Horsfield, National Physical Laboratory, Teddington, Middlesex, United Kingdom

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