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Scientific American, Vol. 84, No. 25 (June 1901) (1901)

leaf 7

An illustration from Scientific American, Vol. 84, No. 25 (June 1901), 1901, leaf 7
he cost of the tunnel is about nation (1:20), but becomes more level $425,000, or $850 per yard. as it passes under the river (1:600). *-•-• —— The tunnel tube is composed of cast- Turpentine mixed with wax is iron annular segments varying in known to give very good floor wax. A ■width from 500 to… … ▲ Bend in the Tunnel. Commencement of a Double-Tube Section. THE STRALAU -IREPTOW TUNNEL BENEATH THE RIVER SPREE. ©1901 SCIENTIFIC AMERICAN, INC.

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