. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . re had been suddenly projected againsta resisting surface. If an electrical discharge of an immensepotential is received upon a small resisting portion of the skinof the body of the patient who is insulated and placed in thepath of the current, the impact at the surface of discharge will 54 STATIC ELECTRICITY. be marked, producing a local vibratory effect. The intensity ofthe effect will depend upon (i) the resistance of the skin, whichdiminishes as it becomes moist, (2) upon the size of the sur-fa
. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . re had been suddenly projected againsta resisting surface. If an electrical discharge of an immensepotential is received upon a small resisting portion of the skinof the body of the patient who is insulated and placed in thepath of the current, the impact at the surface of discharge will 54 STATIC ELECTRICITY. be marked, producing a local vibratory effect. The intensity ofthe effect will depend upon (i) the resistance of the skin, whichdiminishes as it becomes moist, (2) upon the size of the sur-face receiving the discharge, and (3) upon the potential ofthe current. So different, then, are the conditions and effectsof currents having a receiving and discharging electrode, andthose having but the receiving electrode, that there are rea-sons to expect different results. And different results are cer-tainly obtained which are now awakening new interest in elec-tro-therapeutics. The wave-current (quoting from the paper of Dr. Mortonread before the American Electro-Therapeutic Association,. Kig. 34.—/, Insulated Platform; P, Patient; E, Electrode;6\ General Connection; S. G., Spark Gap. September 23, 1900) was first so termed because its circuitto be completed produced Hertzian waves emanating from thepatients person. (See Prontispiece.) The current was first published in the Bulletin Officiel de laSociete Francaise dElectrotherapie of January, 1899, and laterin the Electrical Engineer of March 4 of the same year, and bythe writer both in the Medical Record of March 3, 1900, and inthe Transactions of the American Electro-Therapeutic Asso-ciation for 1900. The connections to produce this current are given in Fig. 34. A very important modification of this method is shown inthe next illustration (Fig. 35). A metallic foot-plate, upon which the patients bare feetrest, is connected, by a rheophore to an extraneous and inde- CONDUCTIVE DISCHARGES. 55 pendent insulated capacity. I
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