ms a general depres- waters across the intervening distance in a solid sion on the summit of the ridge, and Nature has rock, and, as excavated rock occupies about double the iuasonry viaduct. The Croton aqueduct, or, as it is space that it does in the solid mass, the contractors helped to lessen… … 3._SECTION THROUGH DOUBLE CONDUIT BELOW MAIN Fig. GATE HOUSE. feature to travelers over the old Albany post road (bet- material. The excavation is being done with powerful be 2614 feet and its area nearly 175 acres, by surround- ter known as Broadway), and the unbroken service steam dredges and…
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