United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 154
eration. The neg-ative is replaced upon the base in exactly its positionduring the exposures. Column (t) is replaced and the two >indicators d and d made to occupy exactly the positionsof the two focal centers during the exposures. Thepointed weights m and m are placed upon the centersof the… … Fig. 3. Late model Marion localizer, showing two pointers and table caliper. 147 148 X-RAY MANUAL—U. S. ARMY path of the vertical ray for each exposure. These rowill then if projected upward touch the centers of d amd1 and if projected downward will touch the centers o:the two skin marker shadows.…
