. Annual report of the Boston Transit Commission, for the year ending .. . hich exceeds the contract requirement by about percent. In the maximum 20 minutes it carried at the rate of7,782 men or 1,197,649 pounds per hour, exceeding the con-tract requirement by about per cent. During this test, readings were obtained from which theefficiency of the escalator at the contract load was determinedto be 72 per cent., which exceeds the contract guarantee by10 per cent. The efficiency is considered as the ratio betweenthe horsepower used in lifting the men and the horsepowerreceived over th
. Annual report of the Boston Transit Commission, for the year ending .. . hich exceeds the contract requirement by about percent. In the maximum 20 minutes it carried at the rate of7,782 men or 1,197,649 pounds per hour, exceeding the con-tract requirement by about per cent. During this test, readings were obtained from which theefficiency of the escalator at the contract load was determinedto be 72 per cent., which exceeds the contract guarantee by10 per cent. The efficiency is considered as the ratio betweenthe horsepower used in lifting the men and the horsepowerreceived over the feed wires at the control apparatus. As the Hawley street escalator is not located near a stair-way, it was impractical to make a three hours full load test by amethod similar to the one used at Chauncy street. The motorwas tested under its maximum rated load. In the field theescalator was tested under a light load for a period of eighthours. During the last three hours of this period the escalatorwas loaded with varying loads to determine its efficiency under PLATE 1. WASHINGTON STATION. LOBBY, LOOKING EASTERLY.
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