It is 1826 "feet long and 836 feet wide on the outside angle of the embankment; containing an area of 35 acres, divided into two divisions, and is (a little over) 5 miles from the City Hall. From the receiving reservoir, a double line of iron pipes three feet in diameter, are laid down in 80th street and 5th Avenue, to convey the water 2..176 miles to the distributing reservoir at Murray Hill. The location of this reservoir is on the 5th Avenue, between 40th and 42d streets, and is three miles from the City Hall ; it is 420 feet square on the cornice of the exterior wall,

CROTON ACIUEDUCT. 203

and contains an area of 4.05 acres, divided into two equal divisions, and has an average elevation of 44.5 feet above the level of the streets around it. The length of aqueduct from the Croton dam to the distributing reservoir is 40.562 miles to wit :

Masonry conduit in Westchester county 32.880' -

Do. do. on New York Island 4.187

Total length 37.067

Receiving reservoir from end of aqueduct to south-eastern effluent - gate house 0.172 -

Distributing reservoir - . - 0.080 Iron pipes on bridge over Harlem valley - - 0.275 Do. do. across Manhattan valley - - 0.792 Do. do. between reservoirs - 2.176

40.562

It is proper to add to the above, the length of the Croton reservoir, which has been formed by the erection of the Croton dam and other work necessary to obtain the water, at a suitable level on the Croton river, as without this dam and reservoir, the aqueduct would have required an extension of five miles to reach the proper level on the river ;