. Light energy, its physics, physiological action and therapeutic applications . the discharge from an influence machine,used as a condenser, a capsule with a quartz end, the latterserving also as a compressor. One may use from five toten of these condensing lamps connected with the one sparkgap of an influence machine. The output of such a machineis so tremendous as compared with the voltage required fora single lamp, that the many can be operated equally wellwith the one. In this way several patients can be treatedat the same time. Leduc also devised an apparatus to usewith a powerful induct
. Light energy, its physics, physiological action and therapeutic applications . the discharge from an influence machine,used as a condenser, a capsule with a quartz end, the latterserving also as a compressor. One may use from five toten of these condensing lamps connected with the one sparkgap of an influence machine. The output of such a machineis so tremendous as compared with the voltage required fora single lamp, that the many can be operated equally wellwith the one. In this way several patients can be treatedat the same time. Leduc also devised an apparatus to usewith a powerful induction coil. Both Freund and Strebel ^reund: Radiotherapy. 628 LIGHT ENERGY. have pointed to the possible therapeutic utilization of theultra-violet frequencies in the electric brush light. Strebelconstructed a small condenser which projects these dis-charges in a circular plane. The following arrangement of apparatus, as a source ofintense ultra-violet activity, was suggested by Mr. W. The author is indebted to Professor Samuel A C MAINS STEP UP TRANSFORMER SPARK CAP. CONDENSER 36 MICA PLATESSX6 50 MM THICKSHEET COPPER3X42 MILS THICK ADJUSTABLE IRONPOINTS /si THICKSTEEL KNITTING VERY FAT SPARKVERY RICH IN Fig. 37. Sheldon,1 of the Brooklyn Polytechnic Institute, for com-municating the suggestion, and for the drawing shown inthe accompanying communication. ULTRA-VIOLET LIGHT ENERGY. 629 There are also lo be had other makes of apparatus touse with static machines or coils for the production of ultra-violet rays, but the underlying principle is the same in all. The Strong Ultra-Violet Spark Lamp.—There is a veryexcellent one to use with the Strong high frequency ap-paratus. The principle of this coil is that of Teslas. Thesecoils are well adapted to the production of ultra-violet fre-quencies. An Alternating-Current Arc for Spark Light.—There isanother which is largely used, shown in Fig. 38. This isconnected directly with the alternating-current
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