------ Isometrical View of Culvert, 90 Tunnel and Gate Chamber at the head of the Aqueduct, - - 92

------ View above the Croton Dam, 95 Entablature over the entrance to the Aqueduct, - 96 View below the Croton Dam, Croton Aqueduct at Sing-Sing, Aqueduct Bridge at Sing-Sing, -

----- ----- - - - - 101 10:9.

Aqueduct Bridge for Road-way, Croton Aqueduct at Mill-River, ... - Croton Aqueduct at Jewell's Brook, Croton Aqueduct at Hastings, Croton Aqueduct at Yonkers, ... ----- - -

- -

- Croton Aqueduct at Harlem River, - - - - - 110 View of the Jet at Harlem River, - - - - - 112 Croton Aqueduct at Clendinning Valley, - -' Aqueduct Bridge at Clendinning Valley, - 114 Plan of the Receiving Reservoir, - - - - - 116 Isometrical View of the Distributing Reservoir, - - - 119

:

" The radiant aqueducts

Turn their innumerable arches o'er The spacious desert, brightening in the sun, Proud and more proud in the august approach High oe'r irriguous vales, and woods, and towns, Glide the soft whispering waters in the wind,

And here united pour their silver streams, Among the figured rocks, in murmuring Falls, Musical ever." The Ruins of Rome.

INTRODUCTORY CHAPTER.

A supply of pure and wholesome water is an object so essential to the health and prosperity of a city, that it should

form one of the leading features of the public improvements which characterize its growth. The advantages arising from it are so numerous, and the comforts so great, that every effort should be made to accomplish it.