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This is an admirable exposition of the physical principles involved in roentgen-ray work. It also enters into the details of construction of the individual items of apparatus used in the production of roentgen-ray exposures. The author states that the several chapters presented are an elaboration of the lectures that he gives on this subject in medical radiology and electrology at Cambridge. The thoroughness of the text is commendable. That it represents English practice is quite evident, which, of course, is to be expected. Several points of difference from modern American procedures are noted, such as the question of spark gap measurement of potential, which the author passes over rather superficially, referring only casually to sphere gaps, and the value of the Coolidge tube, which, he states, does not produce fine shadow detail such as is obtained by the ordinary gas tube. He also gives information regarding the Coolidge tube which
The Principles of Radiography. JAMA. 1923;80(5):350. doi:10.1001/jama.1923.02640320062036
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