... theS.T.E. andE. inthespring of 18 87 (Art.xll, vol. ii.).Next,alittlexvi ELECTRICAL PAPERS.PaoisArt. 18 .MAGNETO-ELECTRICCURRENTGENERATORS.- - 11 '2Akt. 19 .ON INDUCTIONBETWEENPARALLEL ... PROPAGA-TIONOFCURRENTIN WIRES. 14 1Art. 21. DIMENSIONSOFA MAGNETIC POLE. - - - - 17 9Art. 22.THEORY OFMICROPHONEANDRESISTANCE OPCARBON CONTACTS. 18 1Art. 23.THEEARTH AS A RETURN CONDUCTOR. - -- 19 0Art.24. ... example oftheseformulte,suppose/= 10 0ohms,e =10 00ohms, and d isknown to beabout 1, 000,000ohms.Thenby (10 ),a= ^10 0,000= 316 ohms.ONDUPLEXTELEGRAPHY. 19 beneutralized,the"feat"isaccomplished.Therearemanywaysofdoingthis....