. Electric railway journal . cross-section of the latest construction is shown in anaccompanying drawing. In laying the new track the sub-grade is thoroughlyrolled with an 8-ton steam roller upon which is placed ij^in. of broken stone to a depth of 7 in., which is also rolled. 9/0 ELECTRIC RAILWAY JOURNAL [Vol. XLII, No. 18. on a i-in. layer of fine stone and stone dust mixed, whichis also carried up another 3^4 in. at the sides of the dust cushion carries 4^2 in. of concrete and a i-in. baseof sand for scoria block, 4 in. deep, or Laurentian granitepaving, these being gro
. Electric railway journal . cross-section of the latest construction is shown in anaccompanying drawing. In laying the new track the sub-grade is thoroughlyrolled with an 8-ton steam roller upon which is placed ij^in. of broken stone to a depth of 7 in., which is also rolled. 9/0 ELECTRIC RAILWAY JOURNAL [Vol. XLII, No. 18. on a i-in. layer of fine stone and stone dust mixed, whichis also carried up another 3^4 in. at the sides of the dust cushion carries 4^2 in. of concrete and a i-in. baseof sand for scoria block, 4 in. deep, or Laurentian granitepaving, these being grouted with a 1 to 2 mixture of cementand sand. A good feature is the use of 8-ft. instead of Details of this basin are shown in an accompanying draw-ing. It has proved so satisfactory, especially in ease ofcleaning, that the railway company has adopted this basinas standard. About 150 are now in use or on order toreplace iron drains. The basin is constructed with a con-crete base and a cast-iron cover grating. It is installed. H f-6- Concrc-te Paving, / Base , 1-4 9^—/— —>J k- m 1 rfT7^T—
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