Society of Glass Technology · [Sheffield] · leaf 361
entioned above. When the densities of the glasses of the 6Si02,^NcU20,yMgOseries * ?re compared with those obtained by the writer for the5Si02,aNa20<tyMgO series, it will be observed that the glasses ofthe latter series have the higher density when corresponding valuesof x and y are taken in… … ]n> x = molecules CaO or MgO. lowers the density of glass, is only true in the particular type ofglass investigated where the silica remains constant molecularlyand the soda is replaced molecularly by magnesia or lime. Thus,in effect, (1 molecule of CaO) — (1 molecule of Na20) increases…
Glass
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