San Francisco : Architect and Engineer, Inc · leaf 204
ntilating plantsthat remove exhaust fumes, depends upon thecubic volume of space earmarked for motor ve-hicles. The ventilating system of the Brooklyn-Battery tunnel, delivering 4,200,000 cubic feet offresh air every minute, has not its equal anywhere INDIVIDUAL plates for the tunnel rings are… … in the world. A complete change of fresh air in thetunnel will be effected every minute and a half. The spearhead of the construction is the shield,a huge circle of solid iron. R. Wilcox describes theefficient manner of this huge tool. With the air com-pressed behind it, the shield drives into the…
Architecture · Building
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