The electro-therapeutic guide, or, A thousand questions asked and answered . rilliant field of fluorescence points downward, and directly above theobject to be radiographed. Short circuit the prime conductors of the staticmachine. This will darken the Crookes tube. Place the photographicplate which has been previously wrapped in black and yellow paper, withthe film side upward, upon the table directly beneath the Crookes the object to be radiographed upon the photographic plate as closeto it as possible. Remove the short circuit from the prime conductors of 118 THE ElvKCTRO-THKRAPBU
The electro-therapeutic guide, or, A thousand questions asked and answered . rilliant field of fluorescence points downward, and directly above theobject to be radiographed. Short circuit the prime conductors of the staticmachine. This will darken the Crookes tube. Place the photographicplate which has been previously wrapped in black and yellow paper, withthe film side upward, upon the table directly beneath the Crookes the object to be radiographed upon the photographic plate as closeto it as possible. Remove the short circuit from the prime conductors of 118 THE ElvKCTRO-THKRAPBUTIC GUIDE your static machine, then the tube will again fluoresce, and the shadow ofthe object to be examined will be impressed upon the photographic the object to be radiographed is thin, it may be placed within six oreight inches of the tube, and short exposure made, varying from one tosix minutes. If the object to be radiographed is thicker, the exposureshould be longer, and the distance between the object and the Crookestube greater, in order to avoid a Various Static Electrodes. The above cut shows a variety of static applicators, for giving static current treat-ments. They accompany every machine, and they will be found adapted for giving differ-ent treatments, and their uses will be advised in the therapeutic pages, and the needs ofthe operator will adapt them to his cases, as he meets them. Generai, Instructions—Should the Crookes tube not fluoresce itindicates that the tube is either punctured, or the vacuum is too high, orthe current running backwards. If the vacuum is too high, it may belowered by gently rubbing the tube with a silk handkerchief, or gentlywarming it by means of an alcohol lamp. Should the tube be punctured,there will be purple light inside the tube, and no fluorescence on the sur-face. If the vacuum is too low, it can be raised by running the currentthrough the tube backwards. X-ray work should be done in a perfectly THE EIvECTRO-TH
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