Practical radiography - a handbook for physicians, surgeons, and other users of X-rays (1901) (14754633491)

Radiogram of Baby.(By A. W. Isenthal.) From: PRACTICAL RADIOGRAPHY: A HANDBOOK FOR PHYSICIANS, SURGEONS,AND OTHER USERS OF X-RAYS by A. W. Isenthal and H. Snowden Ward
Identifier: practicalradiogr00isen (find matches)
Title: Practical radiography : a handbook for physicians, surgeons, and other users of X-rays
Year: 1901 (1900s)
Authors: Isenthal, A. W Ward, H. Snowden (Henry Snowden), 1865-1911
Subjects: Radiography X-rays X-rays Radiography X-Rays
Publisher: London : Published for The Photogram, Ltd. by Dawbarn and Ward, Ltd.
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



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tion for the high penetration of X-rays,but at the same time rather upsets the established views asto the immutability of chemical elements, and opens uppossibilities of tremendous physical importance. ProfessorJ. J. Thomson was led to his theory by extending certainexperiments made by Lenard, according to which the ratioof the density (or specific gravity) and the coefficient ofabsorption for the Rontgen rays in various substanceschange very little, although these factors in themselvesvary enormously, so that the distance through which theLenard rays (at any rate) travel, only depends upon thedensity of the substance, and not upon the nature of thematter. The generation of X-rays, whatever they be, has beenconsidered as dependent upon a certain minimum Electro-Motive force (according to Professor Trowbridge, 100,000volts). Dr. Wehnelt has gone further into this questionand came to the conclusion that X-rays begin theirexistence even at 7000 volts under certain conditions: Plate XIV.)
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Radiogram of Baby.(By A. W. Isenthal.) Plate XII.))