Society of Glass Technology · [Sheffield] · leaf 529
n use to-day, leaks in the bottlebeing tested by mercury gauges. The final fusing of the capillarywas very important and needed great care. The test on eachbottle was that water, at 95° when introduced, should still be atleast at 45° after standing twenty-four hours. W. S. 84 JOURNAL OF THE SOCIETY… … Fig. 64. for use in the manufacture of artificial silk, consists in drawing therod in the usual manner and while it is still soft, laying it on a metalformer, 1, so that it sags down to shape. The former has a grooveto guide the rod and is heated to a suitable temperature. G. D. 125. Producing Spun…
Glass
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