EARTHS. ARGILLACEOUS. 3i.ArgilIa. 
”5 
flefh-colour, with fometimes black fpots or lhrub-Ii!:e ramifi- 
Crftioiis: furface ftiioith and polidied like agate: frafture 
cnnchoidal, w th angular Iragments : contains filica +7,0. 
alumina ig,o. carbonate of magncfia 6,0. carbonate of lime 
5,4. water and air 17,0 Bergman. 
Greafy, lisbtilh, very foft, fliining by friftion, adhering 
to the tongue, browntfh black. 
Bergfeif. IVerrsr inC ron/}. tnineral. 84* 
Found near Olkutfch in PoJami, of an earthy texture. 
Very foft, greafy, adhering to the tongue, plaflic, (lain- 
iiig tile fingers a little, of an eartliy texture, growing 
red in the fire, and before the blow- pipe melting into 
a greenifli glafs. 
Argilla communis CronH, mineral, go. A. 
Brick-clay. Schmeifser miner, i. p. 163, 
.Coniinon clay Kimvan miner. \ p. l~g. 
Common clay, nomfon them. 3. /. 535- 
j. Of a bluctCi cpl'iur, 
Argdia communi?. Syst. nat xil. 3. p. 2C2. n. 9. 
Arg- -vitiefc. rudis. Wall fyit. min. \. p. e^o. n. \. 
1. Argilla figulina ficcitjite rupturis fubteflellata. 
Sy.tt. vat. xii. 3. p. aoz. ». 10. 
Argilla vitrelcenr, cxficcata tcLularis. 
WalLfy!}. mineral, t- p 44* 3 
Argilla incarnata. Syit. nat, xii. 3. p. 202. n. it, 
3. Linus. Terra lateritia, Vtgel miner. 31. 
Found in ahnofl: every part of the globe, frequently forming 
vait Itrata a little below the furface, and often bearing the 
impreiliuns of vegetables: colour blutifri or ycHowilh-grey, 
fmolte-colotir, dull blueilli, rarely green or flelli-colour, and 
impregnated with a greater or lefs degree of filica. 
’•’■‘hirata. Soft, a little greafy, adhering flightly to the tongue, crum- 
bling and foficning in water. 
Argilla arete coher. Af«// JyB. min. i. p.bzi 
Indurated clay, Kirnuan mineral, i./l. 13I. 
Indurated clay. Thom/on chem. 3. />. 53b. 
2. Granular when dry. 
Argilla vitrefeens. IVall. Jpt. min. i. p, 10. n. 5. 
Found in every part of the globe, lightifti, yellowifh, blueifh or 
grceni!h-grey, reddiih-brown, dull rofy, or greenifh.-or varied 
with rounded fpots: of an earthy texture, and difeovers but 
little duftility ; falls to powder, but does not dilfule kfelt in 
water, and is fometimes fo hard as to ferve the purpofes of 
building Hones, 
