A paper by W. F. Ellis read before the N. Y. R. R. Club, describing the operation and defects of various switches. (See also R. R. Gaz., May 29, 1891, pp. 363-4)
Railroad track frogs and switches
Ry Rev
1891
Aufsatz (Zeitschrift)
Englisch
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Railroad track frogs and switches
Engineering Index Backfile | 1888
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 safety switches and frogs
Engineering Index Backfile | 1888
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