. The street railway review . cents per Hi, and the value .. cent per lb. The loss inweight per miles was 5.,i4 lb., ,and tlie net cost per 1,000 miles1,^56 cents. Trailer shoes lost from .81 lb. to lb. per 1,000 miles,with a net cost for this service of from cents to cents. Inalest lasting over .1 period of 92 days of motor and trailer shoes theaverage cost per shoe was $, the cost per car per day being 11,8cents. .Xcknowledgments are dnc to Mr. C. S. Sergeant, vice-president ofthe Boston ITevated Railway for the courtesy of supplying theforegoing
. The street railway review . cents per Hi, and the value .. cent per lb. The loss inweight per miles was 5.,i4 lb., ,and tlie net cost per 1,000 miles1,^56 cents. Trailer shoes lost from .81 lb. to lb. per 1,000 miles,with a net cost for this service of from cents to cents. Inalest lasting over .1 period of 92 days of motor and trailer shoes theaverage cost per shoe was $, the cost per car per day being 11,8cents. .Xcknowledgments are dnc to Mr. C. S. Sergeant, vice-president ofthe Boston ITevated Railway for the courtesy of supplying theforegoing data. »-•-* Counter-Weight Tramway at Sydney. DY E. CUARINI. The extension of one of the Sydney, New South Wales, suburbanlines to the shore of the harbor presented some difficulty because ofa very steep grade near the terminal point. To meet these condi-tions a car with an underground counter-weight was proposed andoventnally put into successful operation. The track on this extension is built on one side of tlie road and. has 83-lb. grooveil rails laid in concrete The rails are tied lo acenter slot similar to that used in cable tramways and the surfaceof the roadway has been completed with tarred macadam. Twincircular trolley wires supported on wooden poles arc used for dis-Iribuling the current. On the same track with the tram cars runs abulTer trolley, provided with a griji which travels in a conduit be-low the surface of a roadway as in ordinary cable praclicc. At theupper end of this coiuluit is a 6-fl. horizontal sheave with sheaves. Carrier sheaves 12 in. in diameter arc placed 30in. apart in the grip conduit and ihe subway. Over these sheavesis led a steel wire cable, one eneing ledaround the sheaves is fastened lo Ihe grip of the bufTer trolley. .\lthe
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
