History of Extension The Third Leg of the Stool—Kenyon Butterfield and the Smith-Lever Act of 1914. Monograph by Robert L. Christensen, Professor Emeritus of Resource Economics. Butterfield (1868 1935), President of Massachusetts Agricultural College 1906-1924, had a formative role in shaping the national Cooperative Extension System. A Virtual Tour of the Amherst Campus
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