. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . This is best done by inimersin<;the coil in a i^ood li(|uid insulator, such as boiled-ont oil. Immer-sion in a li<|nid nia\ be coiisidertd almost an absulute necesRityfor the continued and succ(;ssfnl workinsx <»f such a c(»il. It is, <d course, out tif the (pustiou, in an experimental licturi,with only a few minutes at <lisj»osal bn- the performance of eachexperiment, to show these discharir* |»heuoniena t adxaulair. niGK FREQUEXrr AX
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . This is best done by inimersin<;the coil in a i^ood li(|uid insulator, such as boiled-ont oil. Immer-sion in a li<|nid nia\ be coiisidertd almost an absulute necesRityfor the continued and succ(;ssfnl workinsx <»f such a c(»il. It is, <d course, out tif the (pustiou, in an experimental licturi,with only a few minutes at <lisj»osal bn- the performance of eachexperiment, to show these discharir* |»heuoniena t adxaulair. niGK FREQUEXrr AXI) HTGH POTEXTTAL CURRENTS. 2fl7 a^, tf) produce eacli ])lien(nneiioii at its l)esf, a verv careful adjust-ment is required. But even if imperfectly produced, as tliey arelikely to be this evenino-, they are sufficiently striking to interestan intellicjent audience. Before shcnving some of these curitms elfects I must, for thesake of completeness, give a short desciiptidii of the coil andother ap])aratus used in the ex])eriments with the-disruptive dis-charge this evening. It is contained in a hox i; (Fiu. lo2) of thick hoards of hard. 1;; wourl, covticd on the oiii>idf w itii a /.iiic sluct /., wliicli ; can-tidlNsohlertd all aroimd. It iniglit he ad\i>ahlc. in a strictlv scitntiti of great im|ioitaiici, to do awavwith the metal coxci-, a> it niiglif intiiMJiicc iiiaiiv errors, princi-pallv oil accoinit of \\> coiiipjcx action upon tlic coil, n> a con-denser of M-rv >niall capacity and a> an electrostatic and electro-magnetic sereen. When the coil i- n>cd for >ncli experiments asare her* conlciiiplate(|, tin- einplo\menl of the metal c«»ver offers-^oiiie practical ad\antage>, lint tlie>e are not ol sutlicicnf import-ance to he dwelt Upon. The coil .-honld he placed >\ luinel ricall \ to the metal cover, •,arL hctween .-ImuUl, of coursf, imr hi- too Miiall, oer-taiiily not less than, sjiy, five centimetres, hnt iiiucli m
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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894
