. Archives of physical medicine and rehabilitation . Figure I.— (a)—Beprodnctiou froman orflinary dental film, with sharpdetail. Pig-ure I.— (b)—Ordinary photo-graphic enlargement from FigureI.— (a), as Is commonly used in thestudy of minute II.—(a)—Reproduction fromordinary dental film with emailanxount of II.— (b)—Enlargement fromFigure II.— (a), illustrating thenecessity of sharp definition for en-largements. Figure HI.—Fin-hole radiograph ofskeleton foot with bones lying inapposition to film. Figure IV.—Pin-hole radiographmade of same skeleton foot as inFigure
. Archives of physical medicine and rehabilitation . Figure I.— (a)—Beprodnctiou froman orflinary dental film, with sharpdetail. Pig-ure I.— (b)—Ordinary photo-graphic enlargement from FigureI.— (a), as Is commonly used in thestudy of minute II.—(a)—Reproduction fromordinary dental film with emailanxount of II.— (b)—Enlargement fromFigure II.— (a), illustrating thenecessity of sharp definition for en-largements. Figure HI.—Fin-hole radiograph ofskeleton foot with bones lying inapposition to film. Figure IV.—Pin-hole radiographmade of same skeleton foot as inFigure III. The bones are hereplaced eighteen inches from film,thus cutting the direct rays frompin-hole, so as to produce the desired•nlargement »na yet rstais detail. THE X-RAY AS A MICROSCOPE—WASSON rays could be observed outside the experimented with a tube closed atthe end opposite the cathode with athin sheet of aluminum, and found thatthe rays traveled better in vacuum thanin air, that they produced phospores-c
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1920
