. Electric railway journal . January 5, 1918 Gurney Ball Bearings 370 watt-hours = 1 pound of coal | A recent calculation by W. D. watt-hour at the bus-bar. Add io per Bearce shows that for general pur- cent to cover line losses and you find poses it may be assumed that lbs. that every time you can save 370 watts of coal are required to produce 1 kilo- at the motor you save a pound of coal in tbe boiler Gurney Ball Bearings are now standard equipmenton all Stone & Webster Birney Safety Cars January 5, 1918 ELECTRIC RAILWAY JOURNAL 121

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