Word: quartz
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...practical operation Professor Goddard suggested last week a mirror 20 feet in diameter focusing on a boiler with a fused quartz base. The boiler would contain, instead of pulverized carbon, mercury sprayed continuously at the focus point of the reflected light. The mercury spray would turn instantly to mercury vapor and in turn vaporize the water which would operate a steam turbine. The turbine would operate an electric generator. Efficiency of such a sun engine would be 50% of the sun energy fused.* Professor Goddard calculates that such an engine would produce 30 h.p. while operated under a clear...
...comparison with the results of the previous eclipses. In addition to this, the expedition is equipped with a variety of lenses for rapid photography of the outer reaches of the Corona. A special Ultra Violet camera is being taken from the Mt. Wilson Observatory, which has a silvered quartz lense especially designed for the purpose of photographing this phenomenon in invisible light of too high frequency to effect...
...British Medical Research Council last week decried the use of light treatments. There are two general kinds of light used in medicine-heat-producing, generated by carbon filaments; and ultraviolet ray (artificial sunlight) producing, generated by a carbon arc, by a mercury arc, or by special filaments lighting through quartz. Undoubtedly such lights have done good. This is particularly so of the ultraviolet light, used to overcome rickets by direct exposure of puny children...
...done in three years, will double the astronomer's vision, quadruple the amount of light that at present can be caught from the stars. The great mirror, about 17 feet in diameter, is possible because Professor Elihu Thomson of the General Electric Co. has learned how to fuse quartz into great discs that will not crack, nor warp with heat...
...years later, a little man, almost buried in a great shock of hair and beard, came up from Colorado and began to deepen the Butte pits. William A. Clark learned his trade in a quartz mine and lost his savings in a gold mine. In Butte, he dug for copper. Gold miners, seeing his wagons start out on their 400-mile trek to the nearest railroad at Corinne, Utah, laughed aloud. "There go Clark's rocks," they jeered. And they were 98.37% right. Only 1.63% of the gray copper ore can be reduced to valuable metal...