Great facts : a popular history and description of the most remarkable inventions during the present century (1860)
Bakewell, Frederick C. (Frederick Collier), 1800-1869 · New York, D. Appleton and company · leaf 171
ulated by the fan e; f\^ the impelling weight,and A the wire connected with the distant instrument.The receiving and the transmitting instruments arealike, the only difi*erence between them being thatthe style of the copying instrument is steel instead ofbrass wire. THE ELECTRIC TELEGRAPH. 155 As… … message, or through the paper placed on the cylinder.This will be the case whenever the style of the trans-mitting instrument is pressing on the metallic writing;and at those times the electro-chemical action of thevoltaic current will produce a blue mark on the paperof the receiving instrument, by…
Inventions
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