Society of Glass Technology · [Sheffield] · leaf 218
dified.For a smaller size of pot (height, 5 in.; diameter of top, 4 J in.;thickness of wall, ^ in.) the initial pressure used was 8—15 lb.per sq. in., and the subsequent 5—10 lb. per sq. in., the time offilling being about, one and a-half minutes to thirty seconds, accord-ing to the initial… … Ball valve Fig. 5. 148 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. The diameter of the entry hole in the mould should, of course,be as great as or greater than the thickness of the widest part ofthe wall of the pot, in order to prevent sealing up before the potitself has finished setting, and it is…
Glass
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