Society of Glass Technology · [Sheffield] · leaf 472
ater-cooled by the pipes, D.In there it mixed with thegases to be removed and incondensing brought the latterdown with it, the gas beingtaken out by an auxiliarypump capable of producing avacuum of 0T mm. connectedat E. The vessel to be ex-hausted was connected at V.The condensed mercury re-turned… … 28 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. coal mining than illumination. The difficulty in the way of in-creasing candle power lay in the increase in weight necessary toprovide an accumulator of adequate capacity. Volunteers using amore powerful lamp had obtained an increased output of…
Glass
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