HIGH FREQUENCY AND HIGH POTENTIAL CURRENTS. 859

human frame is conducting I may convey the vibration throughmy body.

First, as in some previous experiments, I connect my body withone of the terminals of a high-tension transformer and take in myhand an exhausted bulb which contains a small carbon buttonmounted upon a platinum wire leading to the outside of the bulb,and the button is rendered incandescent as soon as the transformeris set to work (Fig. 190). I may place a conducting shade on thebulb which serves to intensify the action, but is not necessary.Nor is it required that the button should be in conducting con-nection with the hand through a wire leading through the glass,

Fig. 191. Fig. 192.

for sufficient energy may be transmitted through the glass itselfby inductive action to render the button incandescent,

Next I take a highly exhausted bulb containing a stronglyphosphorescent body, above which is mounted a small plate ofaluminum on a platinum wire leading to the outside, and the cur-rents flowing through my body excite intense phosphorescencein the bulb (Fig. 191). Next again I take in my hand a simpleexhausted tube, and in the same manner the gas inside the tubeis rendered highly incandescent or phosphorescent (Fig. 192).Finally, I may take in my hand a wire, bare or covered with thickinsulation, it is quite immaterial; the electrical vibration is sointense as to cover the wire with a luminous film (Fig. 193).