li§ EARTHS. ARGILLACEOUS. 31, Argilla. 



'viridis^ A little greafy, foft, compa£l, green, fwelling in the fire 

 and becoming firi): .blackiih, then red, and at laft 

 yeilovv. 

 Bolus viridis. Syff. tzaf. xii. 3. /. 203. ;/. 13. e. 

 Terra verde. Crcn^. 7niH. fed 86, i . V, 



Found on IVJount Baldoy S^Meden^ NormuvJyy Saxony^ ard Bo- 

 hemiat frequently vvithju the Almond Itone: makes a green 

 mark, 



^r}j)6titana. HarOi and dry, foft, lightiili, adhering to the toiigue, 

 niching with difficult\, when rubbed wjih metal af- 

 fuming a mefahjc fpicndor. 



Argilla fcabra. Syjl, nat, xii. 3 /. 2C2. n. 8. 



Tripeia Ibltda. WalL jyst. mm. \. p. 91, n, l, 

 ' Tripoli. Kn-q.van mineral, x.p.zoi. 



Tripoli. Sch/zieijjer miner. 1 p 175. Tho^ifon chem, 3. p. 533. 



Found in the fl-^nd Tanna in the iiouth Seap, in the kingdom of 

 ^unisi ill hcJtles^ at the river JJdam Rujji.'r, Sxvecien, Flanaersf 

 Boherpiu, Aufiriuy and various parts ol Germany y in ilratified 

 mountains and not upfrccuently mixed with fulphur: colour 

 whiiiili, yellowifti-grey, cream and ochre-yellow: i? found 

 folid, lias a dull earthy appearance v.hcn broken, and bre^iks 

 into jndeterniinate obrufe regular pieces is loft and fandy 

 between the teeth, and abforbs water with a noilc : docs not 

 {lain the fingers, and frequently reddens when heated : con- 

 tains filica 9,0. alumina 7. iron 3. HaJ'se. 



iumeicens. Reddening a little when heated, fpongy wl-en dry, gree- 

 dily imbibing water with intumeicence and retain- 

 ing it. 



Argilla ir.ixta. Syst. nat. xii. 3. p. 203. w» 15. 



Argilla vitrelcens« Wall. f^st. nun. 1, />. 43. «. 2. 



Found every where in barren plains, particularly in S^wedent 

 and on account of its fiuduatioii and trembling is very dan- 

 gerous to travellers; for ihe furface being dried up is elallic 

 hl:p leather, while the m^ls under it is of the confillence of 



• puitice. 



granda'vc:. Meagre, fomewhat plaltic, growing reddifh and harden- 

 ing in the fire, friable and a little dudy when dry, 

 llowly imbibing water with intumefcence. 



Argiila mixta glarea. i^yjl . nat xii. 3. p, 204. n. 16. 



Aigida gLrea mixta. IValler JyjK i. /». 56.;;. 12. 



hound in ^n-Kieden, particularly m Dalecarliay grey, brown, or 

 reddifh, and in the fummer becomes fo hardened, as not to be 

 broken with a hammer or divided by a wedge : wlien hftcd 

 it is an excellent material in the formation of bakers' 

 cycns. 



