. First series of Railway practice: a collection of working plans and practical details of construction in the public works of the most celebrated engineers comprising roads, tramroads and railroads, bridges, aqueducts, viaducts, wharfs, warehouses, roofs, and sheds, canals, locks, sluices, & the various works on rivers, streams, &c., harbours, docks, piers and jetties, tunnels, cuttings and embankments, the several works connected with the drainage of marshes, marine sands, and the irrigation of land, water-works, gas-works, water-wheels, mills, engines, &c. &c. . Fig. ;i. by the dotted lines
. First series of Railway practice: a collection of working plans and practical details of construction in the public works of the most celebrated engineers comprising roads, tramroads and railroads, bridges, aqueducts, viaducts, wharfs, warehouses, roofs, and sheds, canals, locks, sluices, & the various works on rivers, streams, &c., harbours, docks, piers and jetties, tunnels, cuttings and embankments, the several works connected with the drainage of marshes, marine sands, and the irrigation of land, water-works, gas-works, water-wheels, mills, engines, &c. &c. . Fig. ;i. by the dotted lines. Fig. 2. The holes, i. Fig. 3,formed in the feet of the chair to receive thebolts, have been arranged in a new way; insteadof being in the same line as in ordinary chairs,their centres take two different vertical object of this change is to prevent thesleepers being split, either in driving the bolts,or by the passage of the trains, since they aremuch weakened by the two holes being in thesame line, and passing through the same fibresof the wood. The greatest improvement in themanufacture of these chairs consists in the em-ployment of a centre and a metal mould, which secures an exact shape and a uniform casting,free from roughness. The employment of ametal mould is more valuable than all, becauseit secures the seating of the rail with mathe-matical precision in the place it is intendedto fill in the chair, as well as the requisite incli-nation toward the centre of the way; withoutthe workmen who fasten the wedges having thepower, either from negligence
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Keywords: ., bookauthorbreesscs, bookcentury1800, bookdecade1840, bookyear1847
