Further Investigations on Chemical Glassware
T129-T131 (3 pages)
No examination had been made of two types of American glassware, namely, that of the Macbeth Evans Glass Co. and of the Libbey Glass Co. although P. H. Walker & F. W. Smither had tested them. When the results of the tests on the Macbeth Evans glass are compared, it will be seen that for every reagent tested the glass easily falls within the first class, so that the authors' tests have revealed now seven glasses which are good all round. The composition it will be noted, is that of a zinc borosilicate. Alumina is present only to a small extent, and is therefore, in this case, not the component which imparts resistance.
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