. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . es thus derived greatly intensify thevoltage and produce discharges peculiarly painless when ad-ministered to the surface of the body from one side of the ap-paratus. This device was first designed by Prof. Morton whenexperimenting with the Leyden jars in connection with hisearly X-ray investigations. It was not until later, however,that attention was called to its therapeutic value, when it wasemployed in the treatment of skin affections. Several types ofthis apparatus are manufactured at the pres
. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . es thus derived greatly intensify thevoltage and produce discharges peculiarly painless when ad-ministered to the surface of the body from one side of the ap-paratus. This device was first designed by Prof. Morton whenexperimenting with the Leyden jars in connection with hisearly X-ray investigations. It was not until later, however,that attention was called to its therapeutic value, when it wasemployed in the treatment of skin affections. Several types ofthis apparatus are manufactured at the present time under thenames of transformers and hypostatics. As a therapeuticmeasure it has not been shown to be of particular value, except 52 STATIC ELECTRICITY. in a few skin conditions. In the writers experience, there arefew indications which are not equally well met by the employ-ment of the brush-discharge or high-frequency dischargesfrom the glass or vacuum tubes. If currents passing between two poles are to be desired ofgreat frequency, high potential, and small quantity, or of small Fig. 33.—a, Revolving Plate ; b, Collecting Combs ; c, Prime Conductors ;d, Discharging Rods ; e, Leyden Jars ; g, Electrode. frequency, high potential, and small quantity, there is no cur-rent, with the aid of various Leyden jars and transformers,more rich in the possibilities of variation than the static-in-duced current. Static currents are currents of high potential and small quan-tity, and have the frequency of oscillation under the control ofthe operator. They are safer than the currents of the dArson-val apparatus and to be preferred, unless for some reason agreater amperage may be demonstrated to be of the writer this very action, not a characteristic of currentsof small quantity, is the objectionable feature of the dArsonvalcurrents, except when used with vacuum tubes, and placesthem in the same category with medicines which are designedto benefit one condition, but
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