A paper by W. F. Ellis read before the N. Y. R. R. Club, describing the operation and defects of various switches. (See also Ry. Rev., May 30, 1891, p. 348)
Railroad track frogs and switches
RR Gaz
1891
2 pages
Aufsatz (Zeitschrift)
Englisch
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Railroad track frogs and switches
Engineering Index Backfile | 1888
Railroad track frogs and switches
Engineering Index Backfile | 1891
|Railroad track frogs and switches
Engineering Index Backfile | 1888
|Railroad track frogs and switches
Engineering Index Backfile | 1888
Railroad track safety switches and frogs
Engineering Index Backfile | 1888
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