Mathematical rather than physical law is said to be correct basis for determining longevity of ties; presents table for finding average or mean life of railway crossties and explains its use. See also Wood Preserving News, vol. 3, no. 11, Nov. 1925, pp. 160-165, 1 fig.
What is the average life of railroad crossties?
Ry. Rev
Railway Review ; 77 , n 7
1925
5 pages
2 Figs.
Article (Journal)
English
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