. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . Fi.;. in: l-i(i. iim; taken iij» hy the coil. There i> no l)rcakiiii:- through, no local in-jury, but all the material, insulating and coiidncting. i> unifoi-ndyheated. To avoid nii>under>tanding in regaid to the phy>iol(»gicaleffect of alternating currents ot very high freipuMicy. 1 think itnecessary to state that, while it i,^ an undeniable fact that they areinc«»mparably less dangeron> than currents of low freipiencics,it should
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . Fi.;. in: l-i(i. iim; taken iij» hy the coil. There i> no l)rcakiiii:- through, no local in-jury, but all the material, insulating and coiidncting. i> unifoi-ndyheated. To avoid nii>under>tanding in regaid to the phy>iol(»gicaleffect of alternating currents ot very high freipuMicy. 1 think itnecessary to state that, while it i,^ an undeniable fact that they areinc«»mparably less dangeron> than currents of low freipiencics,it should not he thought that they are altogether harnde^ has jiist bi-cn said refer> oidv to currents from an onlinarvhigh »n induction coil, which cun-cuts are neceswirily verysnndl ; if received directly from a machine or from a -ccondaryof low resistance, they ])rodnce more or les> powerful enect^, amimay cause seri(»us in jury, opccially wIk-u uxmI in conjunctionwith condensers. HIGH FREQUENCY AND HIGH POTENTIAL CURRENTS. 163 The streaming discliarge of a high tension induction coil differsin many resj3ects from that of
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