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Baltimore and Ohio Railroad Records
Edison General Electric Works Photograph Album
Bollman Truss Bridge Collection
Division of Transportation Street Railways Reference Collection
Coal and Gas Trust Investigation Collection
Erie City Iron Works Collection
Northern Pacific Railroad Bridge Construction Photograph Album
Canadian Bridges Photograph Albums
Minnesota Railroads Photograph Albums
J. & W. Jolly Company Records
Model, Vertical Steam Steering Engine, late 19th century
Model, Horizontal Steam Steering Engine, late 19th century
Model, Horizontal Steam Steering Engine, late 19th century
Bartlett Hayward Company Records