. Electric railway journal . rate them without changinghis position. When ready for operation the point of the augeris spotted on the surveyors stake, the truck brakesare set, the compound gear of the truck is shifted intoneutral and then the clutch on the earth boring ma-chine is let in gently. The auger feed is either by handor by gravity. The former, which is used chiefly oninclined holes, is effected by means of a rack on theauger shaft and pinion operated by hand lever. Whenthe auger has buried itself a second clutch lifts ituntil the lower side of the auger is clear of the ground,when it
. Electric railway journal . rate them without changinghis position. When ready for operation the point of the augeris spotted on the surveyors stake, the truck brakesare set, the compound gear of the truck is shifted intoneutral and then the clutch on the earth boring ma-chine is let in gently. The auger feed is either by handor by gravity. The former, which is used chiefly oninclined holes, is effected by means of a rack on theauger shaft and pinion operated by hand lever. Whenthe auger has buried itself a second clutch lifts ituntil the lower side of the auger is clear of the ground,when it is turned at a high rate of speed to discharge itsload and throw the soil clear of the hole by centrifugalforce. A feature of the auger gearing is that in case of anysudden resistance, such as would be caused by strikinga hidden obstruction under the soil, the auger feed isautomatically reversed, thus raising the auger andavoiding injury to the mechanism. An improvementadded after considerable experiment is an earth-retain-. Auger Boring Post Hole Dropping Pole Into Position 904 Electric Railway Journal Vol. 58, No. 21 ing gate which prevents earth from falling off theauger into the hole while it is being raised. To further carry out the idea of keeping the manuallabor of pole setting down to a minimum, a swingingboom derrick was mounted on the truck body with thehoisting line operated by a small power-driven power is likewise supplied by the truck engineand is controlled by levers within reach of the driversseat. Both the boring device and the derrick equipmenthave been adapted to this service by J. B. Spowart ofthe telephone company. Gaging Trolley Wire for Renewal The Percentage of Original Area that Can Be ConsideredSafe for Further Service Can Best Be Determined byAccurate Measurements with Either a Wire Gageor a Micrometer at Frequent Intervals By G. H. McKelway Engineer Distribution Brooklyn (N. Y.) Rapid Transit Company UNTIL recently the time for trolley wi
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