Kirkman, Marshall Monroe, 1842-1921 · New York, Chicago, The World Railway Publishing Company · leaf 327
gave the wear due to the passage of trains and to rust. The conclusions drawn from the data Track Bolt. thus obtained showed that the wear of the soft rails had been about twenty-seven per cent, more than that of the hard rails, or inversely to the tensile strength of the rails. From these…
Railroads · Transportation
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
