i' 4 . EARTHS, argillaceous. 31. Argilla. 
Found in various parts of the world, in clay and limeHone rocks, 
in long layers between clay and limeftunv, fouiCiia-es in the 
form of powder, foinetimes compadi, in which latter cafe it 
adheres to the tongue: colour ochraceous, greyifh or tedoilh- 
white, margaritaceous, lavcndtr-blue, violet, flefh-colour» 
brownilh-red, green, or a mixture of feveral colours : it al- 
ters its- colour in the hre, becomes very hard, and by conti- 
nued belt melts into a red porous flag: is entirely diffufitile 
in water, and when duly moiftened very dudlile, on vvhi.h 
account it is highly ufefui in potteries and china nianuf dlurcs! 
adheres moderately to the tongue, and acquires fome polifh 
by fridfion : tradl.urc fine earthy, often conchoidal : contains 
filica 43,5. alumina 33,2. lime 3,5, iron 1,0. water 1 8,0. 
V^auqueUn. 
fuUonka, Grcafy to the touch, fliitiing by I'ridlioii, lamellar, falling 
into powder in water, crumbling in the open air, 
melting before the blow-pipe into a white glafs. 
Argilla vitrefeens. Wall.Jtst. min. l. f. 48. n. 7. 
Fuller’s earth. Kir--if:an miner. \ . p 184. 
Fuller’s earth. 'Thomfon chem, S 3 ®- 
Found in Britain, Sweden, Saxo”y, and Portugal', brown ot 
grey, with generally a (hade of green, rarely fleflt -colour : 
receives a polifh from fr'dlion, does not adhere to the tongue, 
feels greafy, texture earthy, ftrudlure foniewhst flaty, fradf ure 
impcrfedhly conchoida', and without luftre or traniparency* 
A piece from Hampjhire contained filica 51,8 alumina 25,0, 
carbonate of lime 3,3. o,xyde of iron 3,7. carbonate of mag- 
nefia 0,7. moiftnre 15,5. Bergman. From the great avidity 
with which it abforbs oil, it is tiled by fullers to take greafe 
out of cloth. 
cruttacea. Greafy, lamellar, falling into fmall pieces in water and 
frothing when agitated, before the blow-pipe melting 
into a fpiimid glafs. 
Argilla fullonica. Syst. nat. xii. 3.;). zoi. n, 7. 
Argilla vitrefeens. H'all. fyli min. i, p. 10. 6, 
Found on Mount 0 /mund in Sweden-, cinereods. 
Lemnia. Greafy, fliining by friction, adhering a little to the tongue, 
very foft, lightifh, of a conchoidal texture. 
Argilla incarnata. Syji, nat.'&n. 0, p.zoi.n.b. 
7 ’erra Lemnia, Qonjt. min. S5 B. 
Argilla cruftacea. IVdler fyst. min. \. p.ix. n.b. C. 
Lemni .n earth. Kirwan miner, i. p. lyo. 
Terra Lemnia. Schmeijfer miner, i. p. 165. 
Lcmnian earth. Thomjonchcm. i, p 588. 
FoLi.ud principally in the Ifle ot Lemnos, and in Sikjla-, gene- 
rally dull ifabella, yellow or pale liver-colour, rarely duuted 
