The large double culvert on Saw Mill River, with arches of 25 feet span each and 82 feet in length. The river is 42 feet below grade, and to the top of the aqueduct, 56 feet. The two last structures are connected, the aqueduct passing over both of them, in its course to the city These important pieces of workmanship, are composed of the first quality of building stone, hammer dressed, and well bedded together. They are a credit to the skill of the mechanic, as well as to the architect, and are now nearly complete, the arches of all of them being closed, except at Kill, and Saw Mill River, both of which will be Sing Sing closed before the termination of the present working season.

The Corporation, on their part, continued preparations for the distribution of the water. The following resolution, adopted by both Boards, was approved by the Mayor on the 17th of April :

174 MEMOIR OF THE Resolved, That a line of water pipes be laid through Christopher-street, from Hudson-street to Sixth avenue also, through Clarkson-street, from Hudson to Varick-street, ;

through Varick to Hammersley, through Hammersley to intersect with pipes already laid in Houston-street, also through Houston-street from Hudson-street to Greenwich-lane, and through Greenwich-lane to the Sixth avenue, and that the Water Purveyor be authorised, under the direction of the Joint Committee on Fire and Water, to advertise for estimates for the necessary pipes and fixtures, to lay the same agreeably to the Water Commissiorir ers' map.