SUBWAY OF REINFORCED CONCRETE.

The contractors, to carry out the engineer’s scheme, have had to construct subways beneath the road for the purpose of the services to the districts right and left of it. At Sutton’s-lane, Hounslow, there is a subway built of reinforced concrete, with a blue-brick facing, which accommodates two 66in mains and one 42in main of the Metropolitan Water Board, and in the Heston-road subway there, is a 30in gas main, four water mains, and pipes to carry electric mains. If expectations are realised all the earthwork will be finished in three months’ time. It would be completed earlier if the earth could be deposited in a new place as soon as the steam navvies get out, for these gluttonous diggers lift three-quarters of a cubic yard at one thrust of their jaws, and each of them could fill a thousand wagons a day. The sewers beneath each footpath are of ample dimensions, and it is believed that within five minutes of the heaviest rainstorm the water will have disappeared down the grids, which are only eighty feet apart.