. The Street railway journal . the machinery. Two breeching connections lead from the stack, one forfuture enlargement of the boiler plant, the other connectedto tapered breeching running to the north end of the boiler August 3, 1901.] STREET RAILWAY JOURNAL. 123 room, with branch flues to two 400-hp triple drum B. & W. practical guarantee against shut-downs is obtained. Two boilers. The boilers are 21 ft. wide and 9 ft. high, andcontain 189 water tubes 4 ins. in diameter. The steamdrums are 23 ft. 3^ ins. long and 42 ins. in diameter. Theboiler plant is built for 160 lbs. steam, and the inten
. The Street railway journal . the machinery. Two breeching connections lead from the stack, one forfuture enlargement of the boiler plant, the other connectedto tapered breeching running to the north end of the boiler August 3, 1901.] STREET RAILWAY JOURNAL. 123 room, with branch flues to two 400-hp triple drum B. & W. practical guarantee against shut-downs is obtained. Two boilers. The boilers are 21 ft. wide and 9 ft. high, andcontain 189 water tubes 4 ins. in diameter. The steamdrums are 23 ft. 3^ ins. long and 42 ins. in diameter. Theboiler plant is built for 160 lbs. steam, and the intentionis ultimately to carry very nearly that pressure. At pres-ent the gage is held at 135 lbs. The furnaces used are designed with three separateshort rocker grates for each boiler, each operated from Blake 14-in. x 8-in x 12-in. single boiler feed pumps havebeen installed and piped, so that each or both can eithersupply a large gravity tank or else pump (i) through theprimary heater, (2) through the auxiliary heater, (3). the grate fr(jnt by a hand lever. There is but onerow of ash doors. Spencer automatic damper regulatorscontrol the draft. The coal used is West Virginia slack,and preparations are being made to have such a recordof coal and ash weights, feed-water gallons and tempera-tures and chimney gas temperatures that the managementwill know what their power is costing them, and how toget full value for their fuel. The methods employed in feeding the boilers afford theutmost flexil)ility, and by duplications and by-passes a VIEWS OF CURVE AND TANGENT TRACK CONSTRUCTION through both heaters, or (4) direct to the boilers. Theauxiliary is heated by the exhaust from the exciter engineand pumps. A Worthington water meter of 100,000,000cu. ft. capacity can be inserted into the line of the feedpiping. The pump speed is controlled by a Fisher gov-ernor which throttles the steam supply when the feed-water reaches a given pressure. Penberthy auto-positiveinjectors are ready to fil
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