EARTHS. CALCAREOUS. 12. Spatum, S5 



Po«nd in the mines of Scotland^ Engla7idy Hercyniay Saxony^ 

 German-it Hungary^ and other places, opake or tranfparcni, 

 more commonly white than cinereops or any other colour, 

 fometimes one, fometimes both 0/ the pyramids elongate4 

 and acute, rarely oisgonally Ilriatc j the cr> lids generally 

 minute, difpofed in fcrics or cells, or in a roiular, globular or 

 granular form, 



frigonum^ With a fingle 3-rKled pyr-ami(i. 



Natrum urinofum. Syji nat. xii. 3. p. 92. n. 12, 

 Spat- cryftal. triangul. Wdl Jyfi. mm. \. p. 142. «.6.9. 

 Gmel.Jyst. nat^ 3. />. 447. tab. i . ^. 37. 



2. With the pyramids empty. 



3« The angles of the b^fe of the pyramid truncate. 



4, With the pyramids excavated at top. 



5. With the pyramid augmented at the top with another pyramM, 



0. With the cryftals cluftered in an imbricate manner. 



Cryil:. fubnitr, fpatof. Amczn. acad \, p. 478. /, 16. y, 14. 



Found in the mines of DerHfoirei Sahlctrg in Snj.eden, Ger^ 

 manyy Saxony, Huvgary, &c. opake or tranfparent, moll 

 commonly white, rarely brownifn or yellowifh, stvy rarely 

 olivaceous: the cryttals moft frequently minute, broader of 

 narrower, fometimes capillary, longer or fhoner, often de-* 

 prefled, cluitered fcatteringly or in an imbricate ni-nner, oj* 

 in a kidney or granular form. 



httirculare» With the cryftals appearing in a lenticular form. 



Natrum lentic. acaulon Muf> Tefs. 28 tab^z f.\. 



Found in the mines of Hercynia, Thunngia, Saxony, and Bo-^ 

 hernia, moft frequently white, orten pellucid, or with a milk- 

 white nucleus Ihining through a tranfparent coating: th§ 

 cryftals fometimes hollow, frequently 6-iided, foniitimts in- 

 curved like the beak of an ancient faddie, often cilpoled 

 fcatteredly in cells or in a rofular form or that of ipheiieal 

 granulations. 



^ranatinum With 12 fides confifting of pentangles. 



Porus granaticus. Gerb, mineral, p. ^g, n. 12, 

 Found in the mines of England, Germaay^ Saxony, Hungary, 

 &c. generally white, rarely yellowiih. Is probably only 4 

 variety ot Sp. cubicum or Sp. dodecaedrum. 





