Proceedings of the American Electric Railway Engineering Association ... containing a complete report of the ... Annual Convention, held at .. (1911)
American Electric Railway Engineering Association. Convention, American Electric Railway Association · New York, N.Y. : American Electric Railway Association · leaf 619
under many conditions it will not be practicable. This is especially true in the western states, where the question will frequently be not as to the desirability of treatment, but the selection of a species for use un- treated. It is this phase of it — the relative life of different untreated… … Fig. 6. Untreated Southern Yellow Pine Bridge Timbers. These reported as removed after twelve years' service in a bridge of an Illinois Inter urban Railway. APPLICATION TO OTHER FORMS OF TIMBER While ties and poles are unquestionably the material offering- the largest possibilities for the…
American Electric Railway Engineering Association · Electric railroads · Street-railroads
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