e abutments and blasting outthe rock to the required depth. At the bottom of the 249 hole so formed, cupboards aboat 7 feet wide and 12feet long were opened,.and in them I-beams seven innumber were placed. Ba,ch of the I-beams weighs900 pounds. The holes are to be filled in with con-crete. The old… … ing done is theinsertion of
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