. Cassier's magazine. e seemed to concentrate around the lagbolts, carbonising the wood and finallyloosening the bolts. For the Logan lines of 1900 and alllater lines, therefore, the cross-armswere mortised through the poles andwedged and pinned with hard wood,thus discarding all metal except con-ductors. This construction was origi-nated by Mr. A. L. Woodhouse, who,upon the close of the high pressure ex-perimental work in Colorado, of whichhe had charge, became, and still is,superintendent of the Utah has proved amply slrong, not ex-pensive, and during the four yearsoperation of
. Cassier's magazine. e seemed to concentrate around the lagbolts, carbonising the wood and finallyloosening the bolts. For the Logan lines of 1900 and alllater lines, therefore, the cross-armswere mortised through the poles andwedged and pinned with hard wood,thus discarding all metal except con-ductors. This construction was origi-nated by Mr. A. L. Woodhouse, who,upon the close of the high pressure ex-perimental work in Colorado, of whichhe had charge, became, and still is,superintendent of the Utah has proved amply slrong, not ex-pensive, and during the four yearsoperation of the 400 miles thus con-structed very few poles have beenburned. Provo type glass insulators, designedby Mr. V. G. Converse, have been usedthroughout. Many have broken, butthese have usually shown the effects ofgunshots or stones. In fact, there hasnot been a single breakage, except inone lot, improperly annealed, clearlydue to either internal or dielectricstresses. It is difficult to see wherein r94 CASSIERS MAGAZINE. PIONEER WORK IN POWER TRANSMISSION 95 any other insulators could have donebetter, unless bullet-proof. Collegelaboratory tests to the contrary notwith-standing, leakage losses are inappreci-able, except during severest storms, andthen not serious where insulators areunbroken. It is a mistake to suppose thatUtahclimate is favourable. During the rainyseason it is as wet as any, and the alkalidust of the so-called salt storms is as into an arc, like that which was photo-graphed by Mr. C. E. Baker, the linepatrolman at Mercur, and which hasseveral times been published. A quickturn of the generator rheostat at thecritical instant breaks the arc, withoutinterrupting service of induction arrangement of power houses andtransmissions already described is suchthat the opening of paralleling switchesmay resolve the system into a single
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