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Item no. M590 (meter)
Type: frankmark
Country: Germany
Date of use: 19 February 2014
Cover with blue meter ROBERT-BUNSEN-STRAßE 16-18, indicating postal address of energy supplier company V.W. Günther Mineralölhandelsgesellschaft mbH in Bebra (Germany).
Robert Wilhelm Bunsen (1811 – 1899), scientist (chemist), author of numerous inventions, some bearing his name e.g. laboratory gas burner and carbon-zinc electric cell. He, together with Henry Enfield Roscoe elaborated a basic principle of photochemistry according to which the reaction of any light-sensitive pigment, including a visual pigment in the retina of the eye, is a multiplicative function of the intensity of the light exposure and its duration,
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- Wednesday 26 May 2021
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