{1} 1492-1900.--{2} 1900-1970.

{1} 1492-1900.--{2} 1900-1970. {v.1} The Colonial period.-- The Continental Congress.-- The beginnings of land disposal policy.-- Internal improvements.-- The Erie Canal.-- Consitutionality of internal improvements.-- Clay vs. Jackson.-- Appropriations.-- Preemption Acts.-- Toward free land and soil.-- Improving the Mississippi River.-- Philosophers of Conservation: Thoreau, Marsh, McGee.-- A beginning for timber conservation.-- Land grants.-- Federal Waterway development.-- Timber land troubles.-- John Wesley Powell and land reform.-- A start for forest conservation.-- Beginning scientific forestry. {v.2} Theodore Roosevelt.-- Reclamation.-- Attempts to coordinate national water policy.-- The public domain.-- Establishing federal policy for water power.-- Federal forestry.-- The Ballinger-Pinchot controversy.-- Controlling the Mississippi.-- Broader water planning.-- The waters of the Colorado.-- Franklin D. Roosevelt.-- Harold Ickes.-- Soil Conservation.-- The dust bowl.-- The Tennessee Valley Authority.-- Flood control and water development programs.-- Multiple-use forestry.-- Harry S. Truman.-- Dwight D. Eisenhower.-- John F. Kennedy.-- Lyndon B. Johnson.