Word: quartz
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Dates: during 1950-1959
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...museums, who lent them to the Corning Museum. None dates before 1450, and by that time the industry was well established, centered in Venice's island of Murano, where glass blowers work to this day. The glassmakers imported alkali from Spain and the Near East, pebbles of quartz from the River Ticino near Milan, and manganese, the "glassmakers' soap," which turned their glass to near crystal transparency. They were accurately imitating jewels in glass and turning out beads, tumblers and chalices by the shipload...
...stone tools. Five thousand square feet of the highest sandstone layer yielded 117 stone cleavers, 157 axes, 48 scrapers, hundreds of other tools and weapons. In the three highest sandstone layers, the tools were all made of mylonite, a fine-grained igneous rock; the fourth layer contained tools of quartz, and among them were bones of strange animals: a giant hippopotamus, pigs 6 ft. tall, and a short-necked giraffe-like creature with antlers...
...that looks promising for even the fastest-falling missiles: sheathe the cone with Astrolite, a plastic made by H. I. Thompson Fiber Glass Co. of Los Angeles. Astrolite looks like the familiar brownish material used in workers' hard hats, but the fibers that reinforce the plastic are silica (quartz) instead of glass...
...Quick Pose. With the patient's head in the exact position of the day before (determined by the pins and coordinates and another X ray as a double check), the four-part head of the quartz-crystal, ultrasound irradiator was lowered into the pan. While the patient remained fully conscious, no more distressed than he would have been in a dentist's chair, and talked occasionally, Dr. Meyers gave the 'signal and a technician pressed a button. Ultrasound, at a frequency of 980,000 cycles per second, shot through intervening brain tissues but not in sufficient intensity...
...quiet morning soon after sunup, a big polyethylene balloon took off from near Minneapolis with a weird apparatus dangling far below it. Suspended in a frame was a reflecting telescope of 12-in. aperture built by Perkin-Elmer Corp. of Norwalk, Conn. Its mirrors were made of quartz so that they would not be distorted by solar radiation, and it had an ingenious device to change the focus slightly during each sequence of 20 pictures. This would ensure that one of these pictures would be in good focus. Another device, assembled at the University of Colorado, had the duty...