This windmill, said to be one of world's largest, is seen just after the second of two 32-ton, 80-foot stainless steel blades was set in place at Grandpa's Knob Castleton, Vermont August 25, 1941. The knob is a 2000-foot mountain at Castleton. Palmer Cosslett Putnam, Boston engineer and inventor of the gigantic machine, which is designed to generate 1000 kilowatts of electricity from the mountain winds, stands at the right regarding his creation.