Hoyt, Charles Hamilton, Burr, William H. (William Hubert), 1851-1934, joint author, United States. Bureau of Public Roads · Washington : U.S. Dept. of Agriculture, Office of Public Roads : G.P.O. · leaf 16
the 4-foot sectionof pipe in a small fire sufficient to generate steam from the moisturein the material, which, as it expands, forces the material out of thepipe. Great care should be exercised to have only sufficient fire togenerate the steam slov/ly, or otherwise the material may shootout of the… … r^???^7?7y:^>!yy^ A V<i^ ••;•>:.
Bridges · Culverts
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