running right and left (Avhen facingthe scale) is placed parallel to the edge of the scale. In otherwords, they are in the same vertical plane. The scale is noAV raised 112 THE RONTGEN RA TS IN MEDICAL WORK or lowered so that the zero mark on it stands at precisely the sameheight vertically above… … Fig. 60.—Mackenzie Davidsons Choss-Thkead Localized The negative is placed upon the horizontal stage and adjusted sothat the white lines produced by the cross-wires are made to coin-cide with the crossed lines on the glass plate, care being taken thatthe marked quadrant is in the same relative…
X-rays · Radiography
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