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Ficheiro:Dr Aron's electricity meter (Forty Years of Electrical Progress).jpg

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Dr Aron's electricity meter of 1888

The first commercial electricity meter introduced to England. (p. 31) It was the invention of the German Dr Hermann Aron and was made and sold in the UK by Hugo Hirst of GEC.
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Origem Scan from [[http://philosopedia.org/index.php/Adam_Gowans_Whyte | Whyte, Adam Gowans (d. 1950)]] (1930) Forty Years of Electrical Progress, Londres: Ernest Benn, pp. p. 159
Autor Andy Dingley (scanner)
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atual16h48min de 14 de janeiro de 2010Miniatura da versão das 16h48min de 14 de janeiro de 2010708 × 1 010 (140 kB)Andy Dingley{{Scans from 'Forty Years of Electrical Progress'}}

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