An international system of electro-therapeutics : for students, general practitioners, and specialists . e solenoid arethe seat of induction currents of extreme energy. They act like conduc-tors closed upon themselves, and are traversed by induced currents ofgreat intensit3^ From a ph3siological point of view, the effects obtainedare the same in the two cases, and are chiefly as follow : First, no effectupon the general sensibility and muscular contractility. This is the moststriking phenomenon. We have currents capable of burning to incan-descence a series of electrical lamps. These lamps pla
An international system of electro-therapeutics : for students, general practitioners, and specialists . e solenoid arethe seat of induction currents of extreme energy. They act like conduc-tors closed upon themselves, and are traversed by induced currents ofgreat intensit3^ From a ph3siological point of view, the effects obtainedare the same in the two cases, and are chiefly as follow : First, no effectupon the general sensibility and muscular contractility. This is the moststriking phenomenon. We have currents capable of burning to incan-descence a series of electrical lamps. These lamps placed between twopersons, D D (Fig. 6), completing the circuit, are lighted without pro-ducing any sensorial impressions. The current is ver^^ strong. A littleheat may be experienced at the points of entrance and exit of the cur-rent from the body. I have been able to pass through my body currentsof more than 3000 milliamperes, when currents of a quantity ten timesless would be extremely dangerous if the frequency in the place of being500,000 to 1,000,000 per second were lowered to 100 per second, the. Fig. 7.—SoiiENOiB and Coil for Use in Connection with Condensers. usual rate of alternating currents employed for medical purposes. Therehas been much anxiety for an explanation of these paradoxical resultsto which I first called attention in my lectuies at the College of Franceand at the Society of Biology. In my communication to the Society ofBiology I suggested two hypotheses : 1. Whether these currents, onaccount of their enormous frequency, pass exclusively upon the surfaceof the body (it is well known that ordinary currents of great frequencydo not penetrate, but flow upon the surface of the conductor, as doesstatic electricity). 2. Whether the sensory and motor nerves are organ-ized to respond only to vibrations of determined frequency, as we see,for example, in the case of the optic nerve, the terminations of which areblind to the undulations of ether at a rate less than
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
