. Light energy, its physics, physiological action and therapeutic applications . ion to the pressure of the static currentand the windings and resistance of the coil. From the medical side at least, there is much in relationto vacuum tube discharges demanding study and investiga-tion. 668 LIGHT ENERGY. From both varieties of tubes, however, are to be obtainedthe action of a chemically active light energy—not ultra-violet but blue-violet—therefore, the effect is twofold, ,that of a high frequency discharge, itself next of kin to light,and that of light. Vacuum Tube Discharges in Therapeutic
. Light energy, its physics, physiological action and therapeutic applications . ion to the pressure of the static currentand the windings and resistance of the coil. From the medical side at least, there is much in relationto vacuum tube discharges demanding study and investiga-tion. 668 LIGHT ENERGY. From both varieties of tubes, however, are to be obtainedthe action of a chemically active light energy—not ultra-violet but blue-violet—therefore, the effect is twofold, ,that of a high frequency discharge, itself next of kin to light,and that of light. Vacuum Tube Discharges in Therapeutics.—These va-cuum tube discharges serve a very useful purpose in thera-peutics. The mechanisms may be connected (I) to a hightension coil, (2) to a static machine. In both instances atransformer may be used, but not necessarily. Ley den jarsmay be interpolated in the circuit of a static machine, butthis is not the authors practice. Vacuum tubes may also beused with an interrupter consisting of from 30 to 50 smallbrass balls separated about one-quarter of an inch, secured. i^coa; Fig. 40.—Interrupter. to some non-conducting base (this is very apt to be madeof hard rubber, but it becomes heated, and may actuallymelt, as it were, under the heat generated). This results ina distortion of the rod which renders it unfit for further with a combination of shellac is recommended. Thismechanism is provided with a sliding rod, which may bemoved backwards and forwards, as is desired, thereby in-creasing or decreasing the number of spark gaps in the cir-cuit. Fig. 40 shows one of these interrupters. This isusually known as the Files Interrupter. By the use of thismultiple spark gap, the intensity of the discharge through VACUUM TUBE DISCHARGES. 669 the tube is increased. Fig. 41 shows vacuum tubes withleading-in wires (1) for surface contacts, (2) for aural, and(t,) for nasal applications. These the author has used daily
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