Railroads 285 History 68 Finance 45 Employees 33 Transportation 15 Railroads and state 13 Labor unions 11 more ... Periodicals 10 Canals 9 Salaries, pensions, etc 9 African Americans 8 Rates 8 Design and construction 7 Employment 7 Management 7 Freight 6 Locomotives 6 Commerce 5 Sources 5 Location 4 Street-railroads 4 Strikes and lockouts 4 Surveying 4 Businessmen 3 Cars 3 Corporate reorganizations 3 Description and travel 3 Directories 3 Discrimination in employment 3 Early works to 1850 3 Economic conditions 3 Exhibitions 3 Histoire 3 Railroad companies 3 Social aspects 3 Accounts, bookkeeping, etc 2 Archives 2 Aspect social 2 Burlington strike, 1888 2 Capitalists and financiers 2 less ...