Society of Glass Technology · [Sheffield] · leaf 419
y quartz is stable at 310°, but at highertemperatvires aluminosilicates begin to appear. In the absence ofcarbon dioxide, zeolites are formed at 100°, but apparently theirlimit of stability is reached below 300°. However, the opinion isexpressed that in no case was a true equilibrium obtained in… … Fig 2. 59. A Special Stopcock for DroppingLiquids arranged for Equalising thePressure Above and Below the Outlet ofthe Stopcock. H. L. Fisher (/. Ind. Eng.Ghem., 1918, 10, 1014).—When dropping liquidsinto a vessel in which the pressure is either aboveor below the atmospheric, it is usual to connect…
Glass
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