. The street railway review . ration of steam there are five Stirling water-tubeboilers and space has been left for the future installation of onemore of the same size as the last one erected. The latteris of 350 h. p. capacity, contains 264 3V4-in. tubes and has Mc-Qave shaking and dumping grates with a combined area of 54sq. ft., and a McClavc argand steam blower in the ash pit forsupplying forced draft. The remainder of the boiler equipment in-cludes two double batteries of two 272-h. p. boilers each, all of whichhave McClave grates and blowers with the exception of onewhich is fitted with
. The street railway review . ration of steam there are five Stirling water-tubeboilers and space has been left for the future installation of onemore of the same size as the last one erected. The latteris of 350 h. p. capacity, contains 264 3V4-in. tubes and has Mc-Qave shaking and dumping grates with a combined area of 54sq. ft., and a McClavc argand steam blower in the ash pit forsupplying forced draft. The remainder of the boiler equipment in-cludes two double batteries of two 272-h. p. boilers each, all of whichhave McClave grates and blowers with the exception of onewhich is fitted with a Merrill gas burner. The draft is regulatedby throttling the steam supplies to the blowers by means of Spencerdamper regulators. The large boiler delivers its products of com-bustion through a 54-in. steel stack no ft. high and the othersdischarge into a smoke header which connects to the base of acircular brick stack. 8 ft. in diameter and 120 ft. high, built by the.\dam Weber Sons, New York. Outside of the boiler house and. RESULT OF FIRE IN .\ND GENER.\TOR running its length, there is a wooden box 2 ft. square which servesas a muffler for the blow-oflf of steam from the safety valves. The boilers generate steam at a pressure of somewhat less than150 lb., the safety valves being set for that pressure, and deliverthrough 9-in. connections to an overhead main carried alongthe passage at the rear of the boilers, to which is connected asteam pressure gage and a Bristol recording gage. This headergradually increases in size to i6-in. and continues underground Feb. 20, 1904.] STREET RAILWAY REVIEW. 97 through an insulated brick-lined conduit about 150 ft. long, tothe engine room, where it connects near the center of a u-in. live-steam header under the floor. The header is drained by means oftraps, and from it the branches to the mdividual engines are takenup through the floor and down with two right angle bends, throughAustin separators to the steam chests. All stea
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