File:Practical electro-therapeutics and X-ray therapy - with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray (1912) (14570439508).jpg

Identifier: practicalelectro00mart (find matches)
Title: Practical electro-therapeutics and X-ray therapy : with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray
Year: 1912 (1910s)
Authors: Martin, James Madison, 1866-1947
Subjects: Electrotherapeutics X-rays Diagnosis, Radioscopic Eye Electric Stimulation Therapy X-Ray Therapy Ophthalmologic Surgical Procedures
Publisher: St. Louis : C.V. Mosby
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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resented by B and A,which are respectively negatively and positively charged, as indi-cated by the plus and minus signs. P is the static platform, sup-ported by glass legs L for the purpose of insulation. M repre-sents the patient seated on the platform and connected by means ELECTROSTATICS 53 of the metallic rod (shepherds crook) B to the positive prime con-ductor. The other prime conductor is grounded by means of a wireor chain C connected to the gas or water pipe. When the patientis connected to the negative prime conductor, he is made negativeby having electrons forced into his body, but, when connected tothe positive prime conductor, he is made positive by having elec-trons extracted or withdrawn from his body. The patient takesthe position of the inside coating of a Leyden jar, the wallsof the room are the outer coating, and the air is the dialectric.If the air were a perfect dialectric, the patient, when connectedto the negative prime conductor, would become thoroughly charged,
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Fig. 21.—Method for static insulation. and no more current (electrons) could be carried to him; while,on the other hand, if he were connected to the positive prime con-ductor, the electrons would be taken from him until a point isreached where no more could be made to pass. Since the air isnot a perfect insulator, the electrons will leak off or onto thepatient in either case, and the current is continuous. When giv-ing this modality, it is noticed that the hair stands on end, and,if the patient presents his hand toward another person, a hissingsound will be heard, caused by the passing of electrons to or fromthe patient. Because of this leakage a constant current is keptup through the patients body during the treatment. (2) Spray or Breeze.—This modality is simply an increased orconcentrated leaking at some desired point arranged by the opera- 54 PRACTICAL ELECTRO-THERAPEUTICS AND X-RAY THERAPY tor. Fig. 22 illustrates the arrangement of the machine, patient,and electrode. The bre

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