Physician and Surgeon; A Professional Medical Journal Volume 9

Physician and Surgeon; A Professional Medical Journal Volume 9

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 edition. Excerpt: ...practical purposes, may be considered a "Faradaic" instrument, some slight modifications only are required. The discovery of this method may justly be attributed to the investigations of Professor W. J. Morton, of New York; although Matteucci first devised an instrument which gave shocks by induction simultaneously with the discharge of a Figure 20--An application of the Leyden-jar shock during the eighteenth century. Copied from an old English work. Leyden-jar (see Figure 795 of Ganot's work on Physics, by Atkinson). To produce this form of current, it is necessary to first hang Figure 21.--The static induced current. a pair of Leyden-jars upon the arms of the machine. The size of the jars employed modifies the strength of the current; hence it is necessary to have jars of different sizes as a part of a static outfit. You now attach the chains or, by preference, insulated wires, which serve to connect the machine with the patient, upon the hooks that rest upon the outer coating of the jars. Finally, you attach to the other end of each rheophore an electrode for use upon the body of the patient. The electrodes may be of metal without any covering, or ordinary spongecovered electrodes may be employed (care being taken that the insulating handles are somewhat longer than usual). Before the machine is set in motion, its poles should be approximated closely. This step is important; because the separation of the poles intensifies the current, as long as a spark will pass between them. There are two factors, therefore, in determining the strength of the static-induced current: (1) The size of the jars. (2) The extent of separation of the poles. Dr. Morton has devised an ingenious electrode which allows of an application of this form...show more

Product details

  • Paperback | 248 pages
  • 189 x 246 x 13mm | 449g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236921801
  • 9781236921802