. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . n the room i> turned olV the namebtrmed by them ap|iears in brilliant letler>. It is pei-hap> prererable to perlorm this evpirinient with acoil opeiiited iVdin an alternator o| high triMpienc\, a> then. M6 OF XfhOLA Thsf,.\ owini; to the lianiioiiic i-i^and tall, tlio stivaiii> aiv vcrv iiiiitonii,tlioUi;li tliev aiv less altnii«lant than when produced with >iich aotiil as the present one. This e\])eriineiit, lio\vi\ ei\
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . n the room i> turned olV the namebtrmed by them ap|iears in brilliant letler>. It is pei-hap> prererable to perlorm this evpirinient with acoil opeiiited iVdin an alternator o| high triMpienc\, a> then. M6 OF XfhOLA Thsf,.\ owini; to the lianiioiiic i-i^and tall, tlio stivaiii> aiv vcrv iiiiitonii,tlioUi;li tliev aiv less altnii«lant than when produced with >iich aotiil as the present one. This e\])eriineiit, lio\vi\ ei\ iiiav lie per-formed with low tre(pieiieies, hut much less satisfactorily. AVheii two wires, attached to the terminals of the coil, are setat the j»roj»ei distance, the streams hetween them max he so in-tense as to produce a continuous luminous sheet. T«» show thisj)heiu»menon I have here two circles, e and r ( Fiij. lS!»), of ratherstiuit Mire, one beinii; a])()ut S(l centimetres and the other IJd cen-timetres in diameter. To each of the terminals of the coil Iattach one (if the ciicles. The supp<irrinir wires are so hent tliat. the circles may he |)lace(l in the sanu- |ilaiie, coim-idiiii; as nearlylis pf>Ksihle. AVlien the lii;ht in the r. forniiiiir :i lunniniu> di^-c, w liich eoidd])(• seen from a considerahh di>taiice, such is the intensity of thestreams. The <iuter circle could have heiU much lari^er than thepresent one; in tact, with thi- edil j have use(l nnieli lar«;ercircles, and I have heen ahle to jiroduce a strttiiirly luminoussheet, coverin;^ an area of more than one scpiare metre, which isa feniarkahle effect with this \erv small coil. To a\(iid iincei-- IIIGU FREQUENCY AND HIGU POTENTIAL CURRENTS. 217 taintv, the circle has l»een taken smaller, and the area is uowabout square metre. The frequency of tlie vibration, and the quickness of succes-sion of the sparks l)et\veen the knobs, affect to a marked degreethe appearance of the s
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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894
