etween the end attend.them. The firing pins, followed by four fixed point is usually closed in, spans, the first 365 feet in and on the inside is a length and the others each sloping bullet-proof pent- 300 feet in length. The house roof, which effectu- total length of ally prevents the viaduct any… … earried down a covered way by the pneu- to a marker’s matic process. butt might be The draw easily made span is electric- from the firing ally operated. point. An il- As the pivot pier of the draw span is exposed to floods we are indebted for the accompanying illustrations lustration of such a…
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