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27 0 Silicevus Gtmts. and calx, as well as argill, filex; and irort. t Sauff. p. 64, 65, &c. Mr. Bergman even thinks calx an ingredient efiential to fhorl *. ln the analyfis he gives us of the blick cryflallized fhorl ot Mount Albano, hc found both calx and magnefia, but this was moft probablv a baialtic hornblende. Mr. Bind heim alfo found 21,6 per ct. in what he calls prifmatic fhorl difcovered in limeftone in the Carpaihian Mountains; but it is not clear, as no deicription is given, what llone it really was. Mr. Bergman thinks it was a zeolyte -f. I tried Mr. WiegUb's refult fyrthetically, and found a compound exadfly formed as his refult, omitting »onlv the manganefe, fcarcely fufible at i 4 8°; it formed only a greenilh black porous flagg. To comprehend in one view the different fiani- fications of this term, we may obferve, thut what are called, White Skorls, are fhorlires, or acicular baro- lelenites; Teltow, baialtic hornblendes; Reddijh brown, bafaltic hornblendes, and fometimes tourmalines; Green, it fibrous, fliorlaceous, or vitrous adlinolites; if groffer, ptehnites; fome times even hornblende is called ereen fhorl + ; * Schuld. Abhand. 1784, p. 113. t 2 hy. Ann. 1784, p. yfi. t F«r intlance, by Mr. iitflbn, fee Fftner Freymuth tjtdanken, p, 37, ^8. Violet,