. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . ctrical dischargeof an immense potential is received upon a small resisting por-tion of the skin of the body of the patient who is insulated andplaced in the path of the current, the impact at the surface ofdischarge will be marked, producing a local vibratory effect. 54 STATIC ELECTRICITY. The intensity of the effect will depend upon (i) the resistanceof the skin, which diminishes as it becomes moist, (2) uponthe size of the surface receiving the discharge, (3) upon thepotential of the current, an
. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . ctrical dischargeof an immense potential is received upon a small resisting por-tion of the skin of the body of the patient who is insulated andplaced in the path of the current, the impact at the surface ofdischarge will be marked, producing a local vibratory effect. 54 STATIC ELECTRICITY. The intensity of the effect will depend upon (i) the resistanceof the skin, which diminishes as it becomes moist, (2) uponthe size of the surface receiving the discharge, (3) upon thepotential of the current, and (4) upon the conductivity of thetissues beneath the resisting integument. So different, then,are the conditions and effects of currents having a receivingand discharging electrode, and those having but the receivingelectrode, that there are reasons to expect different different results are certainly obtained which are nowawakening new interest in electro-therapeutics. The wave-current (quoting from the paper of Dr. Mortonread before the American Electro-Therapeutic Association,. Fig- 34-—1> Insulated Platform; P, Patient; E, Electrode;G, General Connection; 5. G., Spark-Gap. September 23, 1900) was first so termed because its circuitto be completed produced Hertzian waves emanating from thepatients person. (See Frontispiece.) The current was first published in the Bulletin Officiel de laSociete Franchise dElectrotherapie of January, 1899, and laterin the Electrical Engineer of March 4 of the same year, andby the writer both in the Medical Record of March 3, 1900,and in the Transactions of the American Electro-TherapeuticAssociation 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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