114. 



EARTHS. ARGILLACEOUS. 31. ArgiUa. 



fullonica. 



cruttacea. 



Lemniam 



Found in various parts of the world, in clay and limeflone rocks, 

 in long la}ers between clay and limeftone, IbnierinieE in the 

 form of powder, fometimes compa;^, in which latter cafe it 

 adheres to che tongue: colour ochraceous, greyilh orredaifh- 

 white, raargariraceous, lavender-blue, violet, fiefh-colour, 

 brownilh-red, green, or a mixture of federal colours : it al- 

 ters its colour in the fire, becomes very hard, and by conti- 

 nued heat melts into a red porous flag: is entirely diifufible 

 in w;:ter, and when duly moiftened very dudlilc, on which 

 account it is highly ufeiul in potteries and china manuf-idlures; 

 adheres moderately to the tongue, and acquires fome pohfh 

 by friftion : fra£lure fine earthy, of:en conchoidal : contains 

 filica43,5. alumina 33,2. lime 3,5, iron 1,0. water 18,0. 

 l^auquelin, 



Grcafy to the touch, fhining by fri£lion, lamellar, falling 

 into powder in water, crumbling in the open air^ 

 meiting before the blow-pipe into a white glafs. 



Argilli vitrefcens. IValL /yst. min. i . p. 48. «. 7, 



Fuller's earth. Kirnx; an miner ^ i. p 184. 



Fuller's earth, 'T how/on chem» 3. /> 538. 



Found in Britainy Sivedenj Saxony^ and Portygal; brown or 

 grey, with generally a fhade of green, rarely flefh-colour: 

 receives a polifh from fridlion, does not adhere to ihe tongue, 

 feels greafv, texture earthy, Itruflure fomewhat flaty,fradure 

 imperfeftly conchoida!, and without luftre or tranlparency, 

 A piece from Hampjhire contained filica 51,8. alumina 25,0. 

 carbonate of lime 3,3. oxyde of iron 3,7. carbonate of mag- 

 nefia 0,7. moifture 15,5. Bergman From the great avidity 

 with which it abforbs oil, it is ufed by fullers to take greafe 

 out of cloth. 



Greafy, lamellar, falling into fmall pieces in water and 

 frothing when agitated, before the blow-pipe melting 

 into a fpumid glafs. 



Argilla fullonica. Syst. nat, xii. 3.^. 201. «, 7. 



Argilla vitrefcens. Wall, [yd min.x^p. 10. «. 6. 



Found on Mount Ofmund in Siveden; cinereous. 



Greafy, fhining by fridion, adhering a Hitle to the tongue, 

 very fuft, lightilh, of a conchoidal texture. 

 Argilla incarnata. SyjK nat xii. 3 p. 201, «. 6, 

 Terra Lemnia, Cronst. min. 85 B. 

 Argilla crullacea. Waller Jyst. min. i. /. 1 1. «. 6. C. 

 Lemnian earth. Kirivan miner, l^ p. 190. 

 Terra Lemnia. Schmeijfer rniner. \^ p, id^, 

 Lemnian earth. Thomjon chenu 3, p. 588. 



Found principally in the Uie oi' Lemnost and inSilefia; gene- 

 rally dull ifabelia, yellow or pale liver-colour, rarely dnuted 



