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American X-ray journal (1897) (14570449887)
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Identifier: americanxrayjour1418unse (find matches)
Title: American X-ray journal
Year: 1899 (1890s)
Authors:
Subjects: X-Rays Radiography
Publisher: St. Louis : American X-Ray Publishing Co.
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities
Text Appearing Before Image:
il on the cathode end of the tube.In tubes of ordinary resistance the directresistance is about three times the re-versed and when the current refuses topass in the proper direction it can prob-ably be passed in the reverse direction ;but if this is impossible then success willusually be attained by introducing aspark gap between the tube and the neg-ative terminal of the generator; a sparkgap at the negative pole reduces the re-sistance, while at the positive pole it increases it; tubes that have been thus re-suscitated are far more efficient thannew tubes which have not yet becomedead. 320 THE AMERICAN X-RAY JOURNAL. PRACTICAL X-RADIANCE. BY J. M. SCOTT, M. D , KANSAS CITY. MO. The power of all x-ray machines arerated according to the lengths of sparkthey will give. According to experiencethis has less to do with their actual ca-pabilities than the volume of spark. Inan inducting coil the length of spark itwill give is governed by the length ofwire and number of turns in the second-
Text Appearing After Image:
FiG. I. ary. The volume of spark is governedby the size of the wire in the secondary.It is much cheaper to make a coil whichwill give a twelve inch spark of smallvolume than with a large volume. Acoil with the secondary wound with asize number thirty-six wire, which is asmall size, will give a spark of small vol-ume, while a coil wound with a number thirty-two wire in the secondary willgive a very large volume. It will take at least four times theweight of number thirty-two wire to givea twelve inch spark that it will of anumber thirty-six. In using a Crookestube the pressure or voltage is to over-come the resistance of the vacuum inthe tube between the internal electrodes.When you have sufficient voltage toforce all the current your machine willgive through the tube at the correct vac-uum for the work youwish to do, that is all thatis necessary; any morethan this simply heatsthe platinum electrode tosuch a high heat that itwdl melt if you do notcut down your current bysome means, or
The American X-Ray Journal was the first radiology journal in the United States. Its first issue was published in May 1897, its founder and first editor was an American physician Heber Robarts (1852–1922), who took an early keen interest in the new Roentgen rays. Robarts was also a co-founder of the Roentgen Society of the United States, the forerunner of the American Roentgen Ray Society (ARRS). In its earliest days the journal struggled to attract any important articles as the majority of the pioneering researchers in the fledgling field of x-rays would prefer to see their work published in the established medical journals. The initial subscription rate for the new journal was one dollar per annum (payable in advance) or two dollars for overseas subscribers. Alternatively, it was ten cents per issue, or twenty cents for readers outside the US. In 1902, Harry Preston Pratt, an American physician from Chicago with an interest in electrotherapy, purchased the American X-Ray Journal from Dr Robarts. In 1904, the American X-Ray Journal subsumed the Archives of Electrology and Radiology (which had previously been the American Electro-Therapeutic and X-Ray Era). Following this, the journal was re-named and re-focussed as the American Journal of Progressive Therapeutics, and this published its last edition in January 1906.
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