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Scientific American, Vol. 29, No. 25 (1873) (1873)
leaf 7
e illustrated in the Big I | length ; 22 miles of this distance is over a plain annexed engravings claims to have succeeded having a gradual rise of 90 feet. Finally, there in producing a combination of useful appara. will be three milesfurtherof open cut, and three tus relating to the operations… … mander Selfridge seems to bemuch more direct shield of sheet iron, F,and outside of this is = and easier to construct. another envelope, or, as it is termed, deflector, © 1873 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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