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By Arthur C. Christie

Excerpt from A handbook of X-Ray Technic

Every X-ray Operator is instructed to make himself completely conversant in the main points of development of the actual equipment with which he's operating. he's then in place to maintain it always at its element of utmost potency. together with his gear in fine condition he can then progressively grasp the small de tails so necessary to reliable X-ray paintings, and with perform in analyzing radiograms he'll ultimately collect skill to correctly interpret them and so as to arrive at right diagnoses.

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Example text

There cathode, and soft and somewhat yellowish not so distinctly divided into hemialso a bluish color just in front of the is if is the vacuum is may be seen extending from the very low a blue cathode to the target. In the tube of high vacuum the fluorescence bright green color and the tube distinct hemispheres. (2) line is of a divided into two is Rontgenoscopy : JJ sing the rontgenoscope and some object such as a skeleton hand as an indicator. It to use his own hand dermatitis and its is very dangerous for the operator because of the sequels.

The wire is then moved to a distance of five or six inches from the cathode and the current turned on to its full strength. This process is re- peated until the tube lights up properly and there is no sparking at the parallel spark gap. The same method is followed when the adjustable regulating spark-gap on the apparatus adjustable wire on the tube. is used instead of the Great care must be ; A MANUAL OF X-RAY TECHNIC 20 exercised in this matter of lowering the tube for it is exceedingly easy to lower extent as to render If a strong current valueless until it vacuum it it is used for regulating is jump a thick yellow spark to of a to such an re-pumped.

Interrupters (1) may be classified as follows: Mechanical. (a) Vibrating. (b) Mercury. This is the slowest. Medium 1. Dipper. 2. Rotary. rate. 3. Jet. (2) Electrolytic. Most rapid and there- fore give the strongest current. 1. Wehnelt. 2. Caldweil-Simon. Vibrating Interrupter. ates — This interrupter oper- on the same principle as the electric bell, consists essentially of a spring carrying at its and end a platinum contact point and an armature of soft iron. The armature is close to the end of the induction coil.

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