. The street railway review . h worm gearing in the past seems to havebeen greatly aggravated by an improper understandingof the necessary qualities of such gearing. Mr. Dawsonfound an efficiency on the trucks in question of from 84to 95 per cent. The worm was turned out of asolid piece of steel and was well polished. It is 6 inchesin diameter, and has a treble thread of 6 inches worm wheel is of phosphor bronze, 15^ inches indiameter. The pitch of the threads is 45 degrees, theangle that gives the highest efficiency. Mr. Dawsonconcludes that to get the highest efficiency with wormge
. The street railway review . h worm gearing in the past seems to havebeen greatly aggravated by an improper understandingof the necessary qualities of such gearing. Mr. Dawsonfound an efficiency on the trucks in question of from 84to 95 per cent. The worm was turned out of asolid piece of steel and was well polished. It is 6 inchesin diameter, and has a treble thread of 6 inches worm wheel is of phosphor bronze, 15^ inches indiameter. The pitch of the threads is 45 degrees, theangle that gives the highest efficiency. Mr. Dawsonconcludes that to get the highest efficiency with wormgearing, there must be a high peripheral speed, a Hmitedpressure between the teeth, a multipule thread, and a 45degree angle between plane of thread and axis of worm. THE MINNEAPOLIS TRANSFER. On May i, the Minneapolis Street Railway Companyput in force its new transfer system for the city are 20 styles of the ticket in use for the 20 differ-ent points of transference. The engraving tells its own ^Conductor No. | Sj. Story of the hour, the line to and the line from which thechange is made. Various colors of the ticket denote theroutes. Manager Hield reports that the method is verysuccessful so far. The transfer arrangement is the resultof a special ordinance. 338 (plMjdJ^^As^^S^im/ SCHEME TO DAM THE NORTH CHANNEL. The most daring project for power production that hasappeared recently is the one to build a dam across theNorth Channel, between Ireland and Scotland, for thepurpose of utilizing the strong currents which now runthrough that channel. It is estimated that there is enoughpower going to waste to supply Ireland and Scotland formiles around with power for all purposes. Our mapgives a good idea of the magnitude of the scheme includes among other things, the building ofa double track street railway across the isthmus. Amillion acres of prime land would be recovered. Con-vict labor would be employed on the construction. Thetime required would be thr
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
