A Treatise on Electricity; In Theory and Practice Volume 3

A Treatise on Electricity; In Theory and Practice Volume 3

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1858 edition. Excerpt: ... the influence of a resting time sufficiently maintained for the transmission of the letter that is desired to be printed. In Mr. Brett's telegraph this function is accomplished by the intervention of an hydraulic apparatus, the ascending movements of which are easily brought about, and the movements of the conduit of which are slowly accomplished. In a system, recently invented by M. Theiler, the telegraphic mechanism is in synchronous movement with that of the transmitter; so that we have merely to stop the latter in front of such or such a letter in order that the telegraphic mechanism shall be immediately stopped, and shall present this letter to the printing mechanism. But the latter is found to be put into action under the same electric influence which has brought about the stopping of the other telegraphic mechanism. In a system devised by M. Du Moncel, the telegraphic mechanism moves on under the influence of the current sent in a certain direction; and the printing mechanism performs its function under the influence of the same current sent in the contrary direction. Did we desire to make a complete enumeration, there would be yet many other trials of the same kind to cite; but, all these apparatus are so expensive, so slow in the transmission of despatches, so delicate in their working, and, consequently, so liable to become deranged, that however perfect they may be, they will probably never become practical; and that for registering telegraphs, the telegraphs with simple signals will in fact always be preferred, which do not necessitate a numerous staff, and to which a very abbreviated stenographic language may be made to apply. It is therefore of these latter that we are about to occupy ourselves, the more so as, independently of the...show more

Product details

  • Paperback | 272 pages
  • 189 x 246 x 14mm | 490g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236525116
  • 9781236525116