Word: quartz
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Dates: during 1920-1929
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There lay the significance of an announcement last week by Physicist Ralph C. Hartsough of Columbia that he had perfected a set of mirror-scales capable of weighing, distinctly and faithfully, down to one 280-billionth of an ounce. Gossamer quartz filaments balance the scales, the slightest titillation of which is reflected from their gold-mirrored surfaces by a ray of light. The ray is split by two half-mirrors, being reunited on the scale-mirrors, where any disparity between the wavelengths of the reunited portions is clearly seen as shadow bands. Thus, when the object weighed (1/29...
...natural instincts a scientist, however, President Little did not give up his research. With Professor W. T. Bovie of the Harvard Medical School, he experimented with the application of ultra-violet rays to plant and animal diseases. With the aid of fused quartz produced by Edward R. Berry of the Lynn General Electric Company, results were produced and ultra-violet rays were pronounced valuable in the curing of rickets in children. President Little recently called the X-ray harmful to the human body, after he had experimented extensively with its effects on mice...
...garnets are twice as heavy as the quartz, four times as heavy as the mica with which it is found, and sinks to the bottom in the shaking process...
...Douglas, Instructor in Geology, to purchase a quartz spectograph for determining the minor constituents of minerals, ores, and rocks, and the composition of minute grains too small to be analyzed in other ways...
...England, a saucer-shaped depression in chalk cliffs of the Medway Valley was found to contain relics, thought to date from mid-Pleistocene times (50,000 years ago). The relics: a "workshop," with 4,000 tools in 17 heaps-hand axes of flint flakes, hammerstones of quartz, corepieces and nodules of flint...