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Scientific American, Vol. 84, No. 12 (1901) (1901)
leaf 8
Boston underground system excavating for the incline in Maverick Square was cannot be rivaled by any of its contemporaries. The tered with a rich Portland cement plaster, and against done without timbering the trench, and the earth was City and South London Railway, 34% miles long, con- this the… … © 1901 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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