Society of Glass Technology · [Sheffield] · leaf 483
comprises twospindles, j, k, driven at the same speedand in the same direction through gearing,p, q, r, from a shaft, s, and having similarlyplaced crank-pins, g, h, at their lower endsadapted to engage freely in recesses, e, /, ina member, a. This member, which may beeither the tool or the work,… … GLASS-MAKING MATERIALS. 53 I.—Glass-making Materials. 89. Salt-cake-Water Glass Mixtures as Substitutes forAlkali in Glass Batches. L. Springer (Sprechsaal, 1920, 53,21).—Mixtures of salt-cake and water glass had recently beenintroduced commercially as substitutes for salt-cake and soda-ash.The…
Glass
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