The water was to be brought in an open canal to the Harlem river that stream was to be crossed ;

by a cast iron cylinder of two feet diameter, with a descent of eight feet. His reservoirs were to be divided into three parts, and two of them again subdivided. The first two divisions he called the reception apartments, which were to be filled with the water from the cylinders while one was filling, the other would deposite the impure particles contained in the ;

water. In every twenty-four hours, one of these chambers was to be drawn off in one of the subdivisions, which he called the reservoir of filtration, and from thence into the division of distribution, after percolating through a bank of gravel and loose sand ; this

last division of the reservoir was to be arched over to insure its coolness.

Mr. Weston offered no estimates of the cost of the work he recommended, but urged very earnestly, that no time should be lost in securing, at any rate, the right to use the Bronx fiver, Avhich then might, as he supposed, be had for a reasonable compensation ; but which from the great advantages for manufacturing purposes that it offered, and its proximity to the city, he argued would rise very much in value.

deserving of notice, that among the various uses to which, Mr. Weston says It is

the surplus water might be applied, he specially instances, ^ the supply of dry docks, which may be constructed to receive the largest ships."