Page:New York arcade railway as projected .. (McAlpine, William Jarvis, 1884).djvu/9

9 movement of about five hundred thousand passengers and about an equal number of tons of freight each day.

Eighth:—The schedule time of trains on the London Railway, between Aldgate and the Mansion House (twelve miles) is 68 minutes. The speed varies from 8 to 14 miles an hour, including 22 stops, or, while in motion, from 16 to 20 miles an hour.

The way trains on the New York Railway will be run at ten miles an hour, including about ten stops on each mile. The express trains will be ran at the rate of thirty miles an hour, including one stop in each mile.

That is, from the foot of Whitehall street to 30th in 6 minutes, or to Central Park in 10 minutes, or to 100th street in 15 minutes, or to 130th street in 17 minutes, or to High Bridge in 22 minutes, or to the North line of the city in 34 minutes.

Ninth:—The London Railways have been tunneled under many high, large and valuable buildings and under every variety of structure met with in a great city, including a monument of 168 tons. In many places the walls of the tunnels have been founded from ten to twenty feet lower than the foundations of adjacent buildings, and in some places the foundations of these adjacent buildings, many being very old and of decayed material, have been underpinned from six to sixteen feet in depth. But in all these cases, through the admirable plans of the English Engineers, the Underground Railway has been constructed with complete success, and without causing any injury whatever to the buildings.

There is no part of the New York Railway where such difficult work will be required. The excavations for the Arcade Railway will not extend to within eighteen feet of the face line of any of the buildings, and the excavations for the vaults (constructed for the city's use), where they are deeper than the foundations of any of the buildings, will be made upon the same successful plans which were used in London.

The underpinning of such of the buildings as will be found necessary, will be of less extent and far less difficult, and can be made without the slightest injury to them..

Tenth:—The grades of the London Railway are very undulating, and in some places very steep. On the Metropolitan portion of the "Inner Circle" they are generally one in one hundred, and in one place one in seventy. The grades of the District portion are flatter and less undulating. On the "Widenning lines," to connect with the country railways, there are grades of one in thirty-nine, in forty, in forty-six, and one in fifty feet.

Two-thirds of the length of the Railway is one curve of 660, 1,000 and 2,000 feet radii.

The New York Railway will be almost a continuous straight line, with very light grades. At Canal Street, and that only for a half a mile there will be a grade of 1 foot in 82.