File:The electro-therapeutic guide, or, A thousand questions asked and answered (1907) (14777504934).jpg

Identifier: electrotherapeut00benn (find matches)
Title: The electro-therapeutic guide, or, A thousand questions asked and answered
Year: 1907 (1900s)
Authors: Bennett, Homer Clark, 1865-1928
Subjects: Electrotherapeutics Electricity in medicine Ohm's law X-rays Electricity Electricity X-Rays Electromagnetic Phenomena Electric Stimulation Therapy
Publisher: Lima (Ohio) : Literary Dept. of the National College of Electro-Therapeutics
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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n rings appear back of the anode, this indicatesthat the polarity of the machine is reversed and that the tube must be dis-connected and reversed, or the current direction reversed by means of thepole changer. THE EIvBCTRO-THKRAPBUTIC GUIDE 161 The X-ray light radiates from the center of the anode outward, there-fore focus the point to be examined directly in front of the center of theanode and about six to ten inches from it. Press the fluoroscope screen close upon the object so as to reduce thelength of the shadow. X-rays penetrate all substances according to their density, consequent-ly bone and metal, having greater density than flesh and blood, will be in-dicated by a more pronounced shadow. The shorter the distance from the source of light the more definite willbe the shadow indicated on the screen. THE TUBE HOLDERWhat is the tttbe holder ? The tube holder is a stand arranged to hold the tube while in action.A good stand should have a heavy, firm base to insure stability, an arm
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