cylinders will be the slowness of operation of the draws. In order to filled with water ; and the exterior surface of the outer overcome this objection, William L. Sampson, of Ocean shell will be enveloped by flame or heat. The steam Grove, N. J., has constructed a drawbridge which con- generated… … aprons will be raised. In order to lock the spans securely in place when STATJBEB'S BTEAH-BOILEB. the waterway is closed, and to prevent all lateral movement, the outer trusses are provided with heels interior cylinder acting somewhat like an inverted bell- extending upon the floors of the opposite…
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