The Architect & engineer of California and the Pacific Coast (1905)
San Francisco, Calif. : Architect and Engineer Co · leaf 133
rceit through an air duct formed betweenthe upper portion of the tunnel archand a suspended reinforced concrete slabceiling from which it i.s allowed to es-cape at intervals through dampers intothe tunnel proper, and thence to thesurface at the portals and stations. In each wall of the tunnel… … W Y B R O PANELS AREEVERLASTINGLY GOOD You can depend upon WliBRO Panels to retaintheir smooth finish and uniform quality. These Panels are everlastingly good and stand forSERVICE. Why buy others ? WYBRO Panels cost no morethan inferior makes. Ask for list of 16S varieties. WHITE BROTHERS 3th and…
Architecture · Building
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