. Radiography and radio-therapeutics . Fig. 24.—Diagram of the discharge from a spark Fig. 25.—Diagram of the discharge from an alter-coil. nating current transformer. (Schall.) It is also stated that in order to get an equally good picture with analternating transformer it was necessary to give an exposure of a little over300 milliampere-seconds, that is, more than 3 times the exposure givenin the experiment A, or 300 to 72 milliampere-seconds. The plate facing this page shows the results of experiments carriedout with a view to corroborating the above. They were conducted underthe same condi
. Radiography and radio-therapeutics . Fig. 24.—Diagram of the discharge from a spark Fig. 25.—Diagram of the discharge from an alter-coil. nating current transformer. (Schall.) It is also stated that in order to get an equally good picture with analternating transformer it was necessary to give an exposure of a little over300 milliampere-seconds, that is, more than 3 times the exposure givenin the experiment A, or 300 to 72 milliampere-seconds. The plate facing this page shows the results of experiments carriedout with a view to corroborating the above. They were conducted underthe same conditions as nearly as possible. The same measuring instrumentswere used, and also the same tube. The transformer was a Victor machine,,the coil a 16-inch o oo in V rC - - - a> r3 9° *■:- ^ > <N ^H <M -* £ ^ «j pq d Q E3 « <j a J --2 Ph cm APPARATUS FOR TIME AND RAPID RADIOGRAPHY 37 In this set of experiments the difference is in favour of the inductioncoil, but there is not nearly so large a variation as in the experiments shownby Schall. The matter is still worthy of an extended series of experiments. Description of Apparatus for Time andRapid Radiography The following descriptions are given as types of the class of apparatusmost likely to be useful when very rapid work has to be done. They are
Size: 1344px × 1860px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidradiographyr, bookyear1919
