. Electric railway journal . ator. From the dry-coal bunker the coal will feedthrough chutes to four pulverizing mills, built by theFuller Engineering Company. These will grind the drycoal to a fineness permitting 95 per cent to pass a 100-mesh screen and 85 per cent to pass a 200-mesh powdered coal will be carried from these mills byscrew conveyor to the north side of the building, raisedto the roof by bucket elevators and distributed byscrew conveyors to steel bins in the boiler plant. The powdered coal will be taken from the bottom ofthe steel storage bins by short screw conveyor
. Electric railway journal . ator. From the dry-coal bunker the coal will feedthrough chutes to four pulverizing mills, built by theFuller Engineering Company. These will grind the drycoal to a fineness permitting 95 per cent to pass a 100-mesh screen and 85 per cent to pass a 200-mesh powdered coal will be carried from these mills byscrew conveyor to the north side of the building, raisedto the roof by bucket elevators and distributed byscrew conveyors to steel bins in the boiler plant. The powdered coal will be taken from the bottom ofthe steel storage bins by short screw conveyors drivenby variable-speed motors and delivered into down pipescommunicating with the burners. The passage of thecoal through the down pipes is facilitated by air. Dutch ovens have been constructed in front of eachboiler and the floor cut away to provide the necessaryfurnace volume and slag pits. The clean-cut doors forthe slag pits are at the basement floor level under theboiler room, and slag will be handled in wheelborrows. DRIER BEFORE PLACING BRICKWORK, WITH DRIERFURNACE IN BACKGROUND 976 Electric Railway Journal to a bucket elevator which will raise it to the top ofa concrete ash bunker. This bunker is arranged to dis-charge into railroad cars or auto trucks. Further details of this installation are given in anarticle by G. E. Quinman in the July issue of the PugetSound Electric Journal. Cutting Paving Foundation with aDrop Hammer By Harley Kim mel Engineering Department, Des Moines (Iowa) City Railway DURING the summer of 1918, the Des Moines(Iowa) City Railway was confronted with the taskof relaying 4500 ft. of track. This work was all onpaved streets with pavement laid on a thick concretebase in which the ties were imbedded. Changes in track construction necessitated the re-moval of this old concrete base which ranged in thick-ness from 8 in. to 14 in. and was of an excellent qualityin most places. Various methods of removing this weretried, none of which were at all sa
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