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) (14754757444)

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

Text Appearing Before Image:

ubes were notstable, for the vacuum was continually rising, until it became sohigh that currents could no longer be forced through them. By X-RAY APPARATUS 101 baking them, it was possible to lower the vacuum for a time, but itwas impossible to control them to any degree. They are no longerused as coil tubes, but in some localities static machine workers areusing them to a considerable extent—mainly because they are verycheap in first cost, a practice that is the poorest kind of economy.Since good tubes are of the greatest importance, no pains or ex-pense should be spared to procure and keep in perfect workingorder the very best tubes that skill can make and money can buy.The author has tried almost every tube that has been put on themarket, and the experience has been costly in both time and money.The modern self-regulating tubes (Fig. 63) are far superior tothe nonregulating variety, and should be used exclusively. Theauxiliary tube on the side at A contains a chemical salt which,

Text Appearing After Image:

Fig. 63.—Modern self-regulating x-ray tube. when heated, gives off a gas that enters the main tube and lowersthe vacuum to a point where the current will pass through it. Thetube is connected to the coil or static machine in the usual way.If the vacuum is too high for the current to pass through it, sparkswill jump across between the wire B and C until enough gas hasbeen liberated from the salt in A to lower the vacuum in the maintube to such a degree that it will admit the current through it, whenit will light up. The vacuum may be held at this point indefinitelyif the current through the main tube is not too strong to overheatit. Very strong currents must not be forced through the auxiliarytube while lowering it, for fear of overheating and breaking theglass. Fig. 64 is a type of high-frequency tube intended only for thetransformer or high-frequency x-ray apparatus as seen in the port- 102 PRACTICAL ELECTRO-THERAPEUTICS AND X-RAY THERAPY able x-ray coils shown in Fig. 58. These tu

practical electro therapeutics and x ray therapy 1912 book illustrations medicine medical illustrations medical history history of technology electric power electricity x ray x ray apparatus surgery medical therapy electrotherapeutics dentistry images from internet archive

1912

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