Railroads Finance 86 History 83 Canals 53 Early works to 1850 27 Design and construction 19 Transportation 18 more ... Rates 17 Surveying 15 Taxation 15 Coal mines and mining 14 Freight 14 Description and travel 12 Mergers 12 Right of way 12 Management 11 Costs 10 Appropriations and expenditures 9 Coal trade 9 Commerce 9 Railroad stations 9 Location 8 Railroad law 8 Coal 7 Crossings 7 Electrification 6 Employees 6 Street-railroads 6 Buildings, structures, etc 5 Commuting traffic 5 Law and legislation 5 Maintenance and repair 5 Mines and mineral resources 5 Public works 5 Railroad mortgages 5 Railroads and state 5 Accidents 4 Competition, Unfair 4 Local transit 4 Paper industry 4 less ...