Cost to railway company of bank-run gravel as compared to washed and crushed ballast; change in views of American Railway Engineering Assn. on washed ballast; amount of sand allowable or desirable in railway ballast. Abstract of address delivered before Nat. Sand and Gravel Assn. (See also Pit and Quarry vol. 17, no. 8, Jan. 16, 1929 pp. 92-93)
Use of gravel as railway ballast
Cement, Mill Quarry
Pit and Quarry ; 34 , n 3
1929
2 pages
Article (Journal)
English
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