. Journal of radiology . ich roentgen rayanthropometry may be intelligently ap-preciated and applied. Footnotes1—Under the directions of the Smith-To be Continued in the July Journal sonian Institute. 2— Figures 207 and 208, page 149. 3— The part to be rayed must beplaced as nearly as possibleagainst the plate or film. 4— Rule of Three:—2 : 4 :: 6 : proportion. ROENTGEN RAY ANTHROPOLOGY(Sex Character of the Cranium) CHARACTERISTIC Value SIZE: very small 1 small 2 intermediate 3 large 4 very large 5 SMOOTHNESS: very srcooth 1 smooth 2 intermediate 3 rough 4 very rou?h 5 SUPRA-ORBITAL B
. Journal of radiology . ich roentgen rayanthropometry may be intelligently ap-preciated and applied. Footnotes1—Under the directions of the Smith-To be Continued in the July Journal sonian Institute. 2— Figures 207 and 208, page 149. 3— The part to be rayed must beplaced as nearly as possibleagainst the plate or film. 4— Rule of Three:—2 : 4 :: 6 : proportion. ROENTGEN RAY ANTHROPOLOGY(Sex Character of the Cranium) CHARACTERISTIC Value SIZE: very small 1 small 2 intermediate 3 large 4 very large 5 SMOOTHNESS: very srcooth 1 smooth 2 intermediate 3 rough 4 very rou?h 5 SUPRA-ORBITAL BIDGES: trace 1 slight 2 moderate 3 medium 4 pronounced 5 excessive 6 MASTOID PROCESS: small 1 moderate 2 medium 3 large 4 excessive 5 ZYGOMATA: slender 1 moderate 2 medium 3 strong 4 massive 5 LOWER JAW: very obtuse 1 obtuse 2 intermediate 3 acute 4 very acute 5 LOWER JAW: very low 1 low 2 intermediate 3 high 4 very high 5 Total sum of character values Name Sex Height Physical condition Clinical Diaenosls a 237. Standardization of Dosage Factors W/HEN visiting the average labora-tory one cannot help noticing thecarelessness and inaccuracy with whichthe factors governing roentgen ray dos-age are measured and recorded. Oneoperator will take the reading of a so-called spark gap meter which is simplya voltmeter on the primary circuit, andrecord it as the gap used without atthe same time stating what rheostatsetting was used. He probably neverrealizes that the reading represents adifferent gap for nearly every setting,and also varies with the milliamperageflowing through the line. Another willset his gap, which may consist of any-thing from a fairly sharp point to oneso blunt that it is nearly a small sphereso far as the action on the spark is con-cerned, and then change from settingto setting until a spark occurs. Anothermay not be satisfied until he has aflame between the points. Still anotherwill make a setting and then, with themachine running, pull or push thepoints t
Size: 1180px × 2119px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1922
