Word: quartz
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Dates: during 1920-1929
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...Cassedy '24 Lakin F. Van W. Mason '24 Jeff J. H. Ricketson '25 Zelma E. N. Carson '24 Francesca E. N. Carson '24 Jake J. J. Hollister '25 George Winsor J. D. Lodge '25 Tom Rover J. D. Lodge '25 Dorothy Miles H. N. Pratt '24 Rose Quartz H. N. Pratt...
...watts it burns. Four long strips of heavily corrugated tungsten steel were used as filaments. The heat generated reached 3,200 degrees Centigrade, melting the glass. A large electric fan was used to cool the air. The inventor, George Bowerman, is experimenting with a type of quartz glass to withstand the heat. Red rays are absent from the spectrum of the big bulb, which closely resembles that of sunlight. The lamp will be used in moving picture studios and color photography. The minute sister bulb was the one used recently by Dr. Chevalier Jack- son, distinguished Philadelphia surgeon, to illuminate...
...miners used used a cave in the cliff for a battery room and for a bomb proof shelter during the blasts. the specimens that are now being arranged for exhibition are largely specimens of feldspar quartz and spodumene. A number of specimens of pink afatite, a rare formation of granite, were found...