Some of the sun's rays, speeding 93,000,000 mi. in eight minutes to Pasadena, Calif., darted last week into the world's most powerful sun-ray concentrator. Designed by Astronomer George Ellery Hale of Mt. Wilson Observatory, this "sun furnace" is 15 ft. long, has more than 30 lenses. When the rays reached the final focussing point, they were hot enough to melt a steel wire like an icicle in a frying pan.
Utilizing radiant energy from the sun is a dream that has harried many an experimenter. The sunshine falling in eight hours on a...
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