to fifteen ed on stone abutments 7 feet t hick at street grade, 4 feet at the spandrels are filled with concrete, plastered with half an feet in length and twelve inches diameter at the butt, and top, and 15 feet high by 58 feet long. These abutments are inch of cement. The bridge at 103d street… … viaduct, from the waiting rooms to two covered landings on The foundations of these arches are first class gneiss rub- Pig. 20._THE UNDERGROUND RAILWAY, N^W YORK CITY,-ESU ELEVATION OF THE VIADUCT, top of the viaduct. The waiting room is on a lev<'l with the ble masonry, and project one foot beyond…
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