125 Calcareous Genus. ioo Parts of this Hone contain about 57 öf calx, the remainder acid and water, in a propor- tion not yet accurately determined, and a fmall proportion of argill, ifilex, and iron, with fome traces of marine acid, and fometimes of cobalt. .Againft the exiftence of the l'parry, as. of an .acid fui genetis, many difficulties were ftarted foon after its difcovery by fome French chemifts, difguifed under the name of Boulanger, and afterwards by Mr. Achard and Mr. Monnet. To remove thefe, Mr. Scheele inftituted a new feries of experiments, which not only impreffed the fulleft convidtion of the objeft they were meant to illuftrate, bnt once more dilplayed the unri- valled abilities of the illuftrious difcoverer, and the infinite refources of his art. Sorry 1 am to add, that, fince the death of this admirable man, a man as eminent in the Chemical as Newton in the mathematical branch of natural philofophy* Mr. Monnet has thought proper to renew his at- tacks in a ftyle of haughtinefs and acrimony that infpires infinite difguft. The fallacy of his rea- foning is fufficiently expofed by Mr. Leonhardi, in the 6th volume of his late learned edition of Maquer’s Diftionary. Of this fpecies we have 3 families : Tbe Sandy; Tbe Compact; and The Foliated^ or Sparry. ift Family. Jn a fandy or earthy form. This has becn found only at Kobola Poiana, in the diftrift of Marmaros, in Hungary. It is of a light
