ur- stretch excava- face trolley lines tion is com- in the city. pleted, and These tracks be- about half of ing of the under- the concrete lin- ground - trolley ing has been put type are ex- in place. tremely heavy There is a in construction, gap of about one while most of block opposite the cars… … erty owners, the operation of and but little PLAN SHOWING IN BLACK LINES COMPLETED EXCAVATIONS ON NEW YORK SUBWAY. the electric work has been tracks, and the done as yet at least possible obstruction to ordinary street traffic. The the framing ribs of a modern steamship. The concret- Long Acre…
Patents · Excavation · Munn · Apparatus · Motor · Scientific American · Feet · Steel work · Square feet · Rapid transit · Petrol motor · American september · Three years · Sewing machine · Horse power · Side walls
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