. Röntgen ray diagnosis and therapy . rs, suffered from infraorbital extensive resection of the nerve the author observed a tem-porary cure. Nine months afterward the same pain was tried now until reaction showed up. While the dermatitis lasted slight reliefwas obtained. It seems that the electricirritation of the periphericnerves inhibits their function,so that there is no the disappearance ofcolicky pains observed in someof the authors cases of chole-lithiasis was due to irradia-tion seems to be doubtful. NOMA (CANCRUM ORIS) Recently the
. Röntgen ray diagnosis and therapy . rs, suffered from infraorbital extensive resection of the nerve the author observed a tem-porary cure. Nine months afterward the same pain was tried now until reaction showed up. While the dermatitis lasted slight reliefwas obtained. It seems that the electricirritation of the periphericnerves inhibits their function,so that there is no the disappearance ofcolicky pains observed in someof the authors cases of chole-lithiasis was due to irradia-tion seems to be doubtful. NOMA (CANCRUM ORIS) Recently the author alsotried to study the influence ofthe rays on noma (cancrumoris). Fig. 319 is an illustra-tion of this horrible diseasein a girl of six years. Thegangrenous process followed a severe attack of scarlet fever. Inspite of using the most radical means (exsection of the necroticarea, followed by use of Paquelins cautery, antiseptic spray,necrotic foci formed again. It seemed that after strong irradia-tion the process was Fig. 319.—Noma after Scaklet Fever. CHAPTEE XXBECQUEREL RAYS AND RADIUM It appears quite natural that as the direct consequence ofRontgens discovery other rays were detected. The Becquerel rays,for instance (discovered by Becquerel in 189G), may be regardedas Rontgen rays of small intensity. Uranium was discovered by Klaproth, a German chemist, morethan a hundred years ago. Peligot isolated the metallic uraniumfrom the chloride in 1840. Becquerel showed that especially uranium and its salts are capa-ble of exciting fluorescent screens. Without being stimulated byany form of electricity, light, or heat, the Becquerel rays can betransmitted through wood, pasteboard, and even thin metal. Theyseem to he identical with the Rontgen rays in that they dischargeelectrified bodies, generate ozone in the atmosphere, are deflectedby the magnet, and are capable of exerting chemical action. The Becquerel rays have less penetrative power than the Ront-gen ray
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