. The American journal of roentgenology, radium therapy and nuclear medicine . of the single skin dose. His12 cases so treated have remained free fromrecidive for from seven months to three of Petrograd added that the recidiveof lymphogranuloma occurs usually in the peri-toneal and retroperitoneal Ijmph-nodes andmanifests itself at first only by temperatureelevation and cachexia. Haenisch of Hamburg presented a remark-able case of abnormally large lymphosarcoma,microscopically confirmed, which extendedover the neck and chest, in which he beganradiation with only two fields, singl
. The American journal of roentgenology, radium therapy and nuclear medicine . of the single skin dose. His12 cases so treated have remained free fromrecidive for from seven months to three of Petrograd added that the recidiveof lymphogranuloma occurs usually in the peri-toneal and retroperitoneal Ijmph-nodes andmanifests itself at first only by temperatureelevation and cachexia. Haenisch of Hamburg presented a remark-able case of abnormally large lymphosarcoma,microscopically confirmed, which extendedover the neck and chest, in which he beganradiation with only two fields, single skin dosethrough .5 mm. of zinc and 3 mm. of aluminum,and in which, despite the complete regressionof the tumors, there followed a severe does not recognize any standard dose forsarcoma or tuberculosis, and warns againstbeginning with intensive radiation, especiallyw ith mediastinal sarcoma, and advises stronglythat a test radiation can be made on a fewfields. Holzknecht recommends the most cau-tious dosage in Basedows disease, lympho-granuloma, and Hoffelders curve of intensity of ray at varying depths. Holfelder of Frankfurt-on-Main spoke uponthe distribution of roentgen dosage in thedepths of the body. He has experimentedon the variation in intensity of the cone of theroentgen rays in a water-phantom. Theexperiments consisted (i) of direct observationand photometry of a zinc sulphite screen illu-minated in water, and (2) of 50,000 measure- Translations and Abstracts 673 nicnts by means of the roentgen dose meterof Siemens and Haiske. The great agreementof all tiie results proves an ahnost completeseparation of the scattered radiation from thedirect. Especially astonishing and of practicalsignificance is the fact that the intensity ofradiation at the edges of the cone of rays fallsoff very suddenh* to a negligible cone of rays is sharply preserved even ingreat depths, and is surrounded by only a veryfaint and practically negligible mantle
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