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Scientific American, Vol. 60, No. 20 (1889) (1889)
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pproximate estimates of cost, and Fort Washington, the bridge was named the the rock being removed by blasting, until a depth of and ‘they were to -be submitted before December 1. Washington Bridge. . In our illustration we show the about 45 feet below high water was reached. Incan- Restrictions… … © 1889 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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