International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 330
llysoft enough to move without the use of a pick, and often formiles the expense of hauling is entirely saved. Under suchconditions earth may be handled at from 14 to IG cents percubic yard at fair profit. The embankment on such sectionshas an average height of about 2 feet. Not an economic… … Fig. 41.3. feet square and 15 inches deep, containing about 4- cubicyard when level full. The box is open in front, and can beraised or lowered and revolves on a horizontal axis. All 920 RAILROAD CONSTRUCTION. movements of the box are made by means of levers. In load-ing, the box is lowered so that…
Railroad engineering
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