The engineers of the Holland vehicular tunnel, connecting Manhattan & New Jersey (TIME, Aug. 30), held a "smoker" last week. They exploded smoke bombs in the cavern they had built, far under the Hudson River, to produce a volume of fumes equivalent to that which would be caused if an automobile burned up on its way through one of the two tubes. Object: to test the ventilating system, upon which the whole success of the tubes depended. Result: complete success. The fumes did not spread more than 50 feet; were swept out of the...
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