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by vitrification, that they bid some re-silience to the Hammer, which is indeedmore or less, according to their impli-cation with more or less impurity andadust Earth , which comes upon the co-agulation of their Mercury. And thuswe may affirm, that all things are madeof the ternalnumber of Classes alt tniMercury, or Water ; where (j lass is thecause of hardness , Sale affords mattes,and Water causes unition and conden-sation.

Chap.