By W.F. Ellis, before the January meeting New England Railroad Club. Discusses and advocates the use of spring-rail frogs. Discusses safety switches and advocates the split or point switch.
Railroad track frogs and switches
Mast Mech
1888
Article (Journal)
English
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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 | 1891
|Railroad track frogs and switches
Engineering Index Backfile | 1888
Railroad track safety switches and frogs
Engineering Index Backfile | 1888
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