Railroads Finance 85 History 73 Canals 53 Early works to 1850 27 Design and construction 18 Transportation 17 more ... Rates 15 Surveying 15 Coal mines and mining 14 Taxation 13 Description and travel 12 Right of way 12 Freight 11 Costs 10 Management 10 Appropriations and expenditures 9 Coal trade 9 Commerce 9 Location 8 Mergers 8 Railroad law 8 Railroad stations 8 Coal 7 Crossings 7 Street-railroads 6 Buildings, structures, etc 5 Commuting traffic 5 Law and legislation 5 Mines and mineral resources 5 Public works 5 Railroad mortgages 5 Railroads and state 5 Accidents 4 Competition, Unfair 4 Electrification 4 Employees 4 Local transit 4 Maintenance and repair 4 Paper industry 4 less ...