NEW SUBWAY IN LONDON.

NEW SUBWAY IN LONDON.

危险的尝试on foot between the Mansion House, the Bank of England, and the Royal Exchange, London, will be reduced to nothing by the opening of a subway which the Central London underground railway has been forced to construct for the good of the public. Forming an irregular oval, the subway is approached by seven independent stairways, each surmounted by indicators, so as to avoid confusion. The stairs are few, with an easy rise. The subway is fifteen feet wide and ten high, and runs round a large central hall, where will be the ticket office for the railway. Five sixty-foot deep shafts, with elevators, supplied by the Sprague Elevator company, of New York—the smallest carrying fifty persons, and the largest, 100 —will rise to the ticket office from the Bank station. A steel trough roof covers the subway, and laid on the steelwork is a bed of concrete two feet thick,with a layer of asphalt for the surface pavement. The clatter of horses’ hoofs can be distinctly heard overhead by people in the subway, but there is no other noise. In the centre the roof rests on girders and columns, while at the side it is maintained by brick walls bedded in concrete. The walls of the subway, the approach staircases, and the tunnel leading to the railway, are lined with white tiles, which, with the incandescent electric lamps hanging from the roof, give the place a bright appearance. During the building of the subway, notwithstanding that so much earth had to be excavated, there was no serious interference with the enormous traffic overhead. The soil was carried by barges down the Thames, and dumped on the low-lying lands. An immense network of pipes, tubes, and cables had to be handled, and to accommodate the new service pipes for these a lower subway had to be built. Among the pipes, etc., so moved, with their many connections, were a thirty-inch and a twenty-four-inch gas main, two twenty four-inch New River water mains, and a smaller main, containing hydraulic pressure of 800 pounds, for the working of elevators. There were, in addition, at least a dozen pneumatic tubes used by the postal authorities for sending telegraphic messages fiom one local office to another, and insulated cables,each inclosing several hundred telegraph and telephone wires. Below all was a sewer of the London county council, eight feet wide and seven feet high. This large brick drain could not be diverted, and the engineers decided to allow it to run between two of the shafts in which the Central London railway elevators will work. The position of all other obstacles has been changed, and every pipe, tube,and cable intersecting the site is now carried in the lower subway, which, resting on a brick invert, is of exactly the same size as the public subway overhead. The bottom chamber is lighted by electricity, and a wooden gangway is to be built round the walls for the convenience of workmen and inspectors. It will, therefore, no longer be necessary to break up the roadway for the purpose of repairing either mains or wires. A connection has been made with the county council sewer, so that, in the event of one of the water mains bursting, the overflow would rapidly pass away, and there would be no possibility of flooding.

危险的尝试on foot between the Mansion House, the Bank of England, and the Royal Exchange, London, will be reduced to nothing by the opening of a subway which the Central London underground railway has been forced to construct for the good of the public. Forming an irregular oval, the subway is approached by seven independent stairways, each surmounted by indicators, so as to avoid confusion. The stairs are few, with an easy rise. The subway is fifteen feet wide and ten high, and runs round a large central hall, where will be the ticket office for the railway. Five sixty-foot deep shafts, with elevators, supplied by the Sprague Elevator company, of New York—the smallest carrying fifty persons, and the largest, 100 —will rise to the ticket office from the Bank station. A steel trough roof covers the subway, and laid on the steelwork is a bed of concrete two feet thick,with a layer of asphalt for the surface pavement. The clatter of horses’ hoofs can be distinctly heard overhead by people in the subway, but there is no other noise. In the centre the roof rests on girders and columns, while at the side it is maintained by brick walls bedded in concrete. The walls of the subway, the approach staircases, and the tunnel leading to the railway, are lined with white tiles, which, with the incandescent electric lamps hanging from the roof, give the place a bright appearance. During the building of the subway, notwithstanding that so much earth had to be excavated, there was no serious interference with the enormous traffic overhead. The soil was carried by barges down the Thames, and dumped on the low-lying lands. An immense network of pipes, tubes, and cables had to be handled, and to accommodate the new service pipes for these a lower subway had to be built. Among the pipes, etc., so moved, with their many connections, were a thirty-inch and a twenty-four-inch gas main, two twenty four-inch New River water mains, and a smaller main, containing hydraulic pressure of 800 pounds, for the working of elevators. There were, in addition, at least a dozen pneumatic tubes used by the postal authorities for sending telegraphic messages fiom one local office to another, and insulated cables,each inclosing several hundred telegraph and telephone wires. Below all was a sewer of the London county council, eight feet wide and seven feet high. This large brick drain could not be diverted, and the engineers decided to allow it to run between two of the shafts in which the Central London railway elevators will work. The position of all other obstacles has been changed, and every pipe, tube,and cable intersecting the site is now carried in the lower subway, which, resting on a brick invert, is of exactly the same size as the public subway overhead. The bottom chamber is lighted by electricity, and a wooden gangway is to be built round the walls for the convenience of workmen and inspectors. It will, therefore, no longer be necessary to break up the roadway for the purpose of repairing either mains or wires. A connection has been made with the county council sewer, so that, in the event of one of the water mains bursting, the overflow would rapidly pass away, and there would be no possibility of flooding.