Word: quartzes
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...very much interested in your article [TIME, Oct. 18] concerning the experiments using ultraviolet transmitting glass conducted in English public schools. The laboratories of Corning Glass Works have recently announced the development of a glass of this type possessing qualities of ultraviolet transmission comparing favorably with fused quartz...
Cleveland schools experimented with quartz windows (TIME, Oct. 18) with good effect upon the health of favored pupils as compared to those of schools where windows were of glass...
Will your editors, well informed, infallible, please provide your subscriber with any available data on quartz, its sources, its preparation for window use, where it may be obtained...
...lump of fused quartz, clear as water, turned purple; a lump of feldspar glowed blue, amber, ruby, amethyst, with patches of brilliant green, successively; a lump of limestone burned angry orange. After exposure to the rays, these minerals looked searing hot but were not. Their fluorescence was without rise in temperature and in some cases persisted for hours after the exposure (as displaced electrons worked slowly back to their places in the atoms). The application of heat and cold (liquid air) altered the speed and intensity of these effects. Diamonds were only temporarily affected by exposure...
...perfect transmitter for ultraviolet rays was found by science in fused quartz glass. But fused quartz is too expensive to put in school windows for little boys to knock baseballs through. The new Corning glass, two millimeters thick, is virtually as stable as standard window glass and only slightly more costly...