r22 
EARTHS. ARGILLACEOUS. 34. Carlofus. 
columnare. 
mglieusi 
Found on the banks of the Rhine, principally near Ander’‘<^ 
and on Mount Vc'gclburg, foine ttet under the furface, 
ftreams of water have not had accefs, dull grey or blackih'' 
rarely variegated : furfacc rough and porous : fradlure coi®' 
mor.ly earthy, rarely lamellar ; it contains fragments rek^' 
bling pumice, cryllals of hornblende, mica, clay, 
quartz, marble, iron ore, and other fubllances ; when poui'“' 
ed it makes the bell cement lor buildings under water. 
Prifmatic. 
1. In 6 liied prifms, 
2. In 5-ftded prifms. 
Found on the banks of the Rhine, and fometimes near the baj* 
of Mount Etna, in columnar malTes of a grey or Ifabella-y* " 
low colour. Handing clofe to each other, and forming inte^' 
nally one common mafs. 
34. CARIOSUS. Confifting of alumina, filica, 
carbonate of lime, with a fmall portion of iron - 
light, loft, porous, falling to powder in water ' 
effervefeing with nitric acid, hardening and grov^' 
insr a little red in the fire. 
Car I os us, Rotten-Jl«’>‘' 
Tripela cariofa. Wall.fyft. tnin. i. p. 92. n 2. 
Creta fufea terra cariofa difla. Da costa fojf. 87. 
Found in Derbyshire, Glamor ganjisire, and other coal countri^|| 
generally over veins of coal : colour Ifabella-yellow, du* 
grey or brown : it calily moulders in the open air, and (oO<' 
falls to powder in water, for which reafon it has been dch'’' 
minated Rotten-ftone. It is principally ufed for polilhi'’^ 
metals and other fubllances. 
