. Electric railway journal . ELECTRIC RAILWAY JOURNAL January 5, 1918 January 5, 1918 ELECTRIC RAILWAY JOURNAL Gurney Ball Bearings 370 watt-hours = 1 pound of coal A recent calculation by W. shows that for general pur-poses it may be assumed that 2^/2 coal are required to produce I kilo- watt-hour at the bus-bar. Add 10 percent to cover line losses and you findthat every time you can save 370 wattsat the motor you save a pound of coalin the boiler Gurney Ball Bearings are now standard equipmenton all Stone & Webster Birney Safety Cars Save Coal Set of 12 Gurney Rearir»B
. Electric railway journal . ELECTRIC RAILWAY JOURNAL January 5, 1918 January 5, 1918 ELECTRIC RAILWAY JOURNAL Gurney Ball Bearings 370 watt-hours = 1 pound of coal A recent calculation by W. shows that for general pur-poses it may be assumed that 2^/2 coal are required to produce I kilo- watt-hour at the bus-bar. Add 10 percent to cover line losses and you findthat every time you can save 370 wattsat the motor you save a pound of coalin the boiler Gurney Ball Bearings are now standard equipmenton all Stone & Webster Birney Safety Cars Save Coal Set of 12 Gurney Rearir»Bs for One-Man Car. Two bearings are usedfor each journal box a
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