Society of Glass Technology · [Sheffield] · leaf 532
der of fusibility. A. C. GLASS : MANUFACTURE AND PROPERTIES. 87 130. Method for Making Articles of Transparent Silica. British Thomson-Houston Co., Ltd., London, and the GeneralElectric Co., Schenectady, New York, U.S.A. (Brit. Pat., No.189926, October 6th, 1921).—A method of making shaped… … Fig. 65. reheating the silica to a plastic state, and then moulding it to adesired form, or extending it through a die, by applying pressure.The silica is first freed from bubbles by melting it in a vacuum andsubjecting it to pressure in the manner described in Specification188451. The resulting…
Glass
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