The tunnellers had penetrated the rock four hundred and six feet on the first of December, and on the first of January, inst., they had extended the work to 653 feet. It is confidently anticipated that several of these tunnels will be completed during the present winter, the work progressing through the intervention of a relay of hands both day and night. The tunnel under contract to Scott & Young, in the village of Sing Sing, is now within a few feet of seeing daylight through it, and a short tunnel of 150 feet under contract to T. N. Ferrell, is cut through from end to end.

Six of the culverts are completed, and five partly finished. They vary in dimensions from two to ten feet span of the arch, and from 50 to 150 feet in length. , The inverted arch or floor of the incomplete culverts is finished, so that the flow of water through the brook, passes them freely and sufficient of the upper arch has been laid to ;

permit the crossing of the valley with the stone embankment. The foundation wall of the aqueduct, amounting to 12,050 cubic yards, and back filling to 10,200 cubic yards, has been executed.

CROTON AQ.UEDUCT. 149

In addition, a large amount of materials has been prpcured for the work, and many items of work performed. Here is a respectable amount of work, considering the time in which it has been performed. Its execution has not only given general satisfaction, as to its permanence and