123 
EARTHS. AROJLLAGEOUS. 32. Puteolana; 
suriferai 
gcnuina. 
msimiliii 
Cineres. 
Found near Crkfdarf in Bu’U.K'irt, :ind near Schemnlz in tlun^ 
garj, cinereous, yeiiowiili,- or , ;;low-red contains of 
lilvcr. 
Softj plaiEc, blueifh, e.xhibiting gold ’.vhent fnfed with 
lead. 
Born. ind. fofs. I. p, 67. 
Found in the mines of Tranjpi-vania, near - Hcrczigan and 
Factbat. 
32. PUTEOLANA. ConMing of alomina, filica, 
and iron, with gena aily fome carbonate of lime: 
friable ; mixed up with water and quicklime be- 
coming fo hard as not to be penetrated by water, 
eafily melting in the fire into a black fcoria. 
Of a dull colour, tinged, readily obeying the magnet. 
Terra pouzzolana. Cronji. nun fifl. zoj. n.^. I. 
Cxmeotum pulverulentum. WalLjyJi. i. /.g,. n. 7. 
Pouzzoiana. Kirnuan mineral, 1. 4II. 
Pouzzolano. Thomjon chem. 4. p. 149. 
Found in the vo’canic mountains of Italy, even in thofe that are 
extinA, chiefly about Naplet and Rome, where it is colleAed 
into tumular maffes : colour dull red, brown or black : fur- 
face rough, uneven, and of a baked appearance : frafture un- 
even or earthy and porous: it is not diffulible in cold water, 
but in boiling water it gradually depolits a fine earth : with a 
fmall portion of lime it makes an cticellent mortar, which har- 
dens even under water. 
Of a dull colour, tinged, hardly obeying the magnet. 
De S. Fond fur hi dif. efpec. de Poux. 1780. 8, 
Found near Chernavari in France, in Germany, and Franconia, 
and probably originates from decayed argillaceous itones. 
Cinereou,s, in the form of alhes. 
Cineres Vulcanorum. Cronst. miner. 297. 
Volcanic alhes- K.rnvan nuneral 1 410. 
Volc mic alhes. '•I bomlon chem, 4. p, >50. 
Found in the neighbourhood of moll volcanic mountains, from 
which they are cjccled with vaft force, and often to a great 
height and diliance, frequently covering va!t furfaccs, and 
fi,,metiines burying whole cities: they are fometimes fo fubtilc 
as to fill up the niinutell crevices : colour brownilh or red- 
difli-grey : they eft'ervefce llightly with acids, have frequently 
a magnetic power, and ulually contain about half their weight 
ofargill, a final! proportion of calx, magneiia and iron, the 
remainder is filicaj 
