Railroads Finance 82 History 63 Canals 50 Early works to 1850 27 Rates 15 Surveying 15 more ... Transportation 15 Coal mines and mining 14 Taxation 12 Freight 11 Coal trade 9 Commerce 9 Design and construction 9 Management 9 Right of way 9 Appropriations and expenditures 8 Location 8 Railroad law 8 Coal 7 Costs 6 Railroad stations 6 Street-railroads 6 Buildings, structures, etc 5 Description and travel 5 Law and legislation 5 Commuting traffic 4 Competition, Unfair 4 Electrification 4 Local transit 4 Paper industry 4 Papermaking 4 Pollution 4 Public works 4 Railroad companies 4 Railroad mortgages 4 Railroads and state 4 Water 4 Water-supply 4 Banking law 3 less ...