Proceedings of the ... National Conservation Congress at ...

accidents acres agriculture American American Revolution annual Applause Association better birds Bureau cause cent Chairman child citizens coal cold storage commerce Commission Conservation movement cost crop death rate delegates disease dollars duty efficiency effort elevators employes fact farm farmer fertility flood Forestry Fourth National Conservation Gifford Pinchot Hardtner hygiene important improvement increase Indiana Indianapolis industry interest JULIA CLIFFORD labor land legislation lives manufacturing meeting ment methods million moral movement National Civic Federation National Conservation Congress national forests natural resources navigable officers organization plant population practical present President problem production progress promotion protection public health quarantine result Richard Lieber river sanitary soil statistics streams supply surveys things tical tion tuberculosis typhoid fever United vital Washington waste water power welfare women yellow fever