American practice of surgery : a complete system of the science and art of surgery . Fig. 193.—Taken under ixactly same conditions as Iig. 192, but development was carried muchfurther. Developed 12 minutes. (Original.) THE TECHNIQUE OF RADIOGRAPHIC WORK. 621 the great causes of i)oor plates (Figs. 185-192). It is of advantage to knowthe principles of photography, to know that the plate is coated with gelatin, thatthe agent acted iijxjn by the light or .r-ray is principally silver bromide, andthat the richer the plate is in this silver salt the better the plate will be, otherthings being equal.
American practice of surgery : a complete system of the science and art of surgery . Fig. 193.—Taken under ixactly same conditions as Iig. 192, but development was carried muchfurther. Developed 12 minutes. (Original.) THE TECHNIQUE OF RADIOGRAPHIC WORK. 621 the great causes of i)oor plates (Figs. 185-192). It is of advantage to knowthe principles of photography, to know that the plate is coated with gelatin, thatthe agent acted iijxjn by the light or .r-ray is principally silver bromide, andthat the richer the plate is in this silver salt the better the plate will be, otherthings being equal. For this reason, although ordinary photographic platesmay be good enough for fractures and gross lesions, for the finer work theyare not to be compared with the special .r-ray plates (see illustrations and 195). Description of Dark-room. A well-ventilated room from which all white light can be excluded is neces-sary. A single ray of white light may be responsible for poor results by actingon the photographic plate dming the process of development. After a room. Fig. 104. Fir;. 105. Fig. 194.—Orrlinary Photographic Plate. Observe difference between this and Fig. 195. (Originid.)Fig. —Same subject as Fig. 194, taken and developed under exactly same conditions, but ona special a:-ray plate. (Original.) which can be darkened completely has been obtained, the next thing of impor-tance is to secure a suitable light by which to develop (Fig. 196). The lightadvised by the makers of .r-ray plates is a ruby lantern or box through whichthe light is transmitted by means of two layers of yellow fabric and one layerof ruby fabric such as may be obtained from any photographic-supply light to be used in these lanterns may be a 16-candle-power incandescentlight, gas, a kerosene lamp, or even a candle; a candle, however, gives such adim light that only one sheet of yellow fabric is necessary. At the same time 622 AMERICAN PRACTICE OF SURGERY it is not safe to expos
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Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1900, bookyear1906
