Raymond, William Galt, 1859-1926, Raymond, William Galt, 1859-1926. cre · New York, J. Wiley & sons, inc · leaf 413
ould be surmounted with a uniform gradient of less rate. The grade profile shows that in comparatively level country,where the vertical elevations surmounted were not so great but thatmomentum could be used effectively in surmounting hills, adversegrades were permitted in order to reduce the cost… … Fig. I.—Beginning Construction, Jones Bluff on Copper Ridge.
Railroad engineering
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