File:American X-ray journal (1903) (14571450760).jpg

Identifier: americanxrayjour1213unse (find matches)
Title: American X-ray journal
Year: 1903 (1900s)
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

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f energized lines of atoms inthe shape of x-rays. A line in the middle of the kathodestream, from K, the center of the kathode,to the focal point F, of the antikathode,is in the axis of the tube. The greatestconcentration of the particles of gas re-flected from the kathode stream is in alinn normal to or at right angles to thesurface of the antikathode. The tube atthis point, owing to the increased numberof particles striking its inner surface, be-comes heated much more readily than anyother portion of the tube. This pointis designated by the letter X. At anyother point, say at R, in which the re-fleeted ray is perpendicular to the axisof the tube, these particles of gas areless crowded, but have individually great-er speed on account of having a freerpatli. We find that the greatest possi-ble penetrating power obtainable from■ny tabe is in tins perpeadicukr line E. which is at right angles to the axis ofthe tube, starting from the focal point F.The point N, at which is the greatest
Text Appearing After Image:
number of particles of gas, is the pointfrom which the greatest number of atomicchains start out, but the penetratingpower of the ray is there cut down. Atthe point N, the tube could be consideredsofter than at any other point. In theperpendicular line passing from the focalpoint F to E, each particle has a muchfreer path than from F to N, consequent-ly the greatest penetrating power is atthe point E. This would be commonlyunderstood by the statement that the tubeis harder at E than at the point N. Physiologically the point at which thex-ray enters the body can be consideredas the anode ; and the point of exit, pro-viding the ray passes thru the body, thekathode. But if the ray penetrates onlya short distance, the point of zero po-tential can be considered the kathode.Certain chemical changes take place,namely, the accumulation of acids at theanode, and of alkalis at the kathode. Thechanges that take place between thesetwo points are simply electrolytic. The factors to be considered i

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