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EarthPower Harvests
Farmers are finding that commercial wind power is the best new commodity to come along in years, one that can offer substantial year-round income.
By Janet Raloff -
HumansNative American Geometry
The circle serves as starting point for this exploration of Native American geometry. Developed by Chris Hardaker for schoolchildren in Arizona, the Web site vividly illustrates the geometric principles that underlie Native American designs. Go to: http://www.earthmeasure.com/
By Science News -
From the July 18, 1931, issue
AIR VIBRATIONS IN ORGAN PIPES REVEALED BY PATTERN IN SMOKE Making smoke rings in organ pipes, to show up the little cyclones that whirl in them when obstacles are placed in the openings, is the curious mode of research adopted by a London physicist, Prof.