. Railway mechanical engineer . L ajiJ!!!^l^yi[{Alf!t. 3 ,4 4||1 41445 Ik O January, 1921 RAILWAY MECHANICAL ENGINEER 27 mediate sub-sills with no enclosed air spaces, which makesit possible to provide continuous floor insulation. The lowerfloor is 24-in. tongued and grooved material nailed directlyto the top of the intermediate sub-sills, the ends of theboards resting on lj^-in. by lj^-in. angle supports boltedto the inside faces of the side sub-sills. This floor is cov-ered with a /4-in- coat of Sarco Bituminous Seal, appliedhot. A 2-in. course of Nonpareil Cork Board is thenlaid while the b

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. Railway mechanical engineer . L ajiJ!!!^l^yi[{Alf!t. 3 ,4 4||1 41445 Ik O January, 1921 RAILWAY MECHANICAL ENGINEER 27 mediate sub-sills with no enclosed air spaces, which makesit possible to provide continuous floor insulation. The lowerfloor is 24-in. tongued and grooved material nailed directlyto the top of the intermediate sub-sills, the ends of theboards resting on lj^-in. by lj^-in. angle supports boltedto the inside faces of the side sub-sills. This floor is cov-ered with a /4-in- coat of Sarco Bituminous Seal, appliedhot. A 2-in. course of Nonpareil Cork Board is thenlaid while the bituminous compound is still hot and this issealed with another J^-in. coa-t of the hot waterproof com-pound. The insulation thus built up is covered with a layerof Peerless mica surfaced insulating paper with the seamscarefully joined to prevent moisture passing through and the

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering