EARTHS, argillaceous. 41. Scorlus. 141 
nitric acid, and before tbe blowpipe melts into a brownifh 
compdft enamel : fpecific gravity from 3,054. to 3,092. 
contains alumina 41,25. filica 34,16. iron 20,00. manga- 
nefe5,4t. Weigleb. 
2. In regular la-fidcd cryftals, with the margins generally 
truncate. , 
Zeylanites. La MetUirc Journ, P'yf. 1 792 - A ’ 5 &- 
Ceylanite. Thomfcn chem. ^ f 515. 
rieonafte, Hauy miner, p, ly . , „ n i 
Pourd in Ckshn^ fometimes in rounded mafies, generally opake, 
except when in very thin pieces: frafturc conchoidat : in- 
ternal luRre g’afiy : colour of the mafs bl^xk, of very turn 
pieces green, red, dufky yellow, or blueiflr : powder green- 
ifh-grey; fpecific gravity from 3 > 7647 - 3 > 793 - contains 
alumina 68. oxyde of iron 16. magnefia 12. filica 2, 
De/colils. 
fluaricus. When heated to 200° of Fahrenheit, attraaing light bodies 
by one end, and repelling them by the other. 
Borax diaphatius. Syst. nat. xii. 3. /*. 7 ^- 4 
Zeolites facie vitrea. Wall. fyH. min. i . p- 271. 
Tourmaline. Kinvian mineral. \-p. 271. 
Turmalin from Zeylon. Scbmeijfer mineral. 1./, 78. 
Eltflric Shorl. Thom/on them. 3. p. 546. , -r, , 
Bound in the rivers of Ceylon, in Brajil, Callilia, tlie iflands on 
the coaft of France, Greenland, Nor^way, Sweden, Smitxerland, 
and Germany, and near Freyburg in Saycony, in Granite, Gneils, 
and other fimilar rocks, fometimes in amorphous pieces, but 
mote frequently ctyftalliied in 3 ot q-fided prifms, with 4“ 
iided fummitt, fometimes in grains : colour generally green, 
fometimes brown, red, or blue: cryftals 3, 6 or g-fided 
prifms, varioufly truncated, with the faces ufually longitu- 
dinally ftriated: is laterally tranfparent, but not longitudi- 
nally : fradlure conchoidal, with often a tendency to the 
foliated : is not readily afted upon by acids: reddens when 
heated, and melts with difficulty into a white or grey enamel: 
when heated to 200° of Fahrenheit, is cledlric, attrailing 
light bodies by one end, and repelling them by the other ; 
but if one end be heated and the other be cold, attrarting 
them at both ends: Ipecific gravity from 3 ?® 5 * 3 , *" 5 5 * 
contains filica 4*^* alumina 39* oxyde of iron 12, lime 41 
exvde of manganefe 2.5. r auquelin. 
