Heinrich Daniel Ruhmkorff

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1Royal Society / Telegraphy / Galvanometer / Fellows of the Royal Society / Mirror galvanometer / Electrical telegraph / Heinrich Daniel Ruhmkorff / William Thomson / 1st Baron Kelvin / Electricity / Technology / Electronic test equipment / Science

5. In February 1872, Edison had borrowed $3,100 from Josiah Reiff to help his brother, Pitt Edison, with the Port Huron and Gratiot Street Railway. Quad. 70.7, p[removed]TAEM 9:[removed]About this time the Exchange Telegra

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Source URL: edison.rutgers.edu

Language: English - Date: 2014-02-02 00:12:12
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