ARGILLA (argillaceous earth) looſely united to half its weight, or more, of ſiliceous earth, and a little calcareous earth.
Cronstedt Min. §§ 108–112. Zeolithus. Zeolite.
There is a great affinity betwixt this and Scherle; but in the zeolite, the component parts cohere ſo looſely, that acids attach and ſeparate them without their being previouſly treated with alkalies; but this is not the caſe with the ſcherles.
Zeolite, contaminated by magneſia, I have not yet examined.
ARGILLA (argillaceous earth) intimately united to a large proportion of ſiliceous earth, and a ſmall proportion of magneſia.
Cronstedt Min. §§ 93–96. Mica. Talcum. [[48]]Glimmer. Talc.