ENG1NE-H0 USES.
179
next to the inside of the outer brick wall opposite each pit, to take the blow from the cow-catcher ofthe engine in case it is run too far over the pit. The heating of the building is done by large cast-ironstoves, and the ventilators in the roof are closed when it is desired to retain the heat in the building.
Between the house and the turn-table the tracks are laid on oak ties in stone ballast. Ihere areno frogs used around the turn-table, the outside flanges of the nearest rails of adjoining tracks justtouching each other at the face of the pit obviating the necessity of using frogs. The turn-table pitis drained through a 10-in. pipe-drain into the main sewer from the house, which consists of a 12-in.clay pipe leading into a 3-ft. sewer on Spring Garden Street. The turn-table is 60 ft. in diameter, ofwrought-iron, and worked by hand. The turn-table pit, side walls, foundations of circular track, and
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