The book Report On Telegraphs And Apparatus was written by author David Brooks Here you can read free online of Report On Telegraphs And Apparatus book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Report On Telegraphs And Apparatus a good or bad book?
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Their exhibit includes all or nearly all the forms of this in- strument used in England, or manufactured therefor export. Among the latter is the Brooks insulator, the invention of the writer, very sim- ilar to those made in the United States. 30. While in Europe, in the year 1867, the writer procured sets of insulators of the following nationalities : Wurtemberg, Italy, Sweden, Denmark, Russia, Prussia, France, Belgium, Switzerland, Austria, and England. Of the last-named nationality there wer...e three standard kinds, viz: the United Kingdom's, the British and Irish Magnetic Tele- graph Company's, and Varley's Double Inverts. These instruments were procured for the purpose of galvanometric measurement and com- parison with those of this country, including the form manufactured by the writer. Of these several instruments one hundred and nine separate tests, during, ' the occurrence of rain, have been made and recorded within the past six years, the results of 'the same having been quite uniform.
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