. Practical points in the use of X-ray and high-frequency currents . Fig. 1.—Represents a Toepler-Holtz Machine. A represents thestationary glass circle having the white paper with the tin foil stripS attached to it; B represents the brush connected with the tinfoil strip on the stationary circle; C represents the neutralizingbrush, D the revolving circle, F one of the metal sectors on therevolving circle. The terminals G G are where the current istaken off from the revolving circle. a machine of less than twelve plates, radio-graphic work, involving hips, shoulders and vis-cera, can not be do
. Practical points in the use of X-ray and high-frequency currents . Fig. 1.—Represents a Toepler-Holtz Machine. A represents thestationary glass circle having the white paper with the tin foil stripS attached to it; B represents the brush connected with the tinfoil strip on the stationary circle; C represents the neutralizingbrush, D the revolving circle, F one of the metal sectors on therevolving circle. The terminals G G are where the current istaken off from the revolving circle. a machine of less than twelve plates, radio-graphic work, involving hips, shoulders and vis-cera, can not be done; but with a machine ofeight plates, fair treatment work can be accom- The Static Machine 9 plished. The composition plate machine de-pends upon great velocity of revolution for theproduction of the current. Consequently alarger motor is required for efficient work, andthe cost of running same is materially Fig. 2.—Represents a Holtz Machine. A represents a stationaryplate, having the paper armature B. C represents a neutraliz-ing comb, D, a collecting comb from which the current is con-ducted to the sliding rods of the main machine. E represents therevolving circle. If this feature is not a consideration, very satis-factory work can be done with these further description of the composition platemachine is essentially that of the glass plate,and can be omitted. 10 X-Ray and High-Frequency Currents The Glass Plate Machine In this country the Wimshurst is not manu-factured for therapeutic purposes, but the pre-vailing types are the Holtz and the Toepler-Holtz. The latter is self-exciting and provesattractive to some on that account. If a Holtzand a Toepler-Holtz have equal areas of revolv-ing surface, the output of current will be greaterfrom the Holtz; when in action the Holtzmachine will not change polarity, which theToepler-Holtz is liable to do, especially whenunder a heav
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