Society of Glass Technology · [Sheffield] · leaf 220
that for a given mould and initial pressure, thetime of rise is a very sensitive measure of the viscosity. Many pots have been cast by this method. Several have beenused in optical glass melts. They are superior to pots cast in theusual manner in possessing a less permeable and more… … Plate 2 [To face Trans., p. 148. H*£E1-* ^13*431 ■ Tr/tj »** i^fl ^H? ^ ,,Si *k r- -. ■i|| ^K ^ ^V3R •\^: i»!^^^^MWHg •{ -.-* ■<£. v- if : v<^^VvSfisB^Sff Plate 3.
Glass
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