A. SYSTEM OF 
270 
SECT. CCXCVIIL 
D* Pearl flag. Scoriae conftanth glohulis viireh 
conglomeratis. 
• Is compounded of white and greenifli 
glafs particles, which feem to have been 
conglutinated while yet foft, or in fufion, 
Found on the Ifle of Afcenfion. 
SECT. CCXCIX; 
E. Slag-fand or afhes. Scoriae fuherulentd^ 
Cineres Vulcanorum, 
This is thrown forth of the volcanos in 
form of larger or fmaller grains. It may 
perhaps be the principle of the Terra Puz- 
zolana (Sedt. ccix. a,)^ becaufe fuch an earth 
is faid at this time to cover the ruins of 
Herculaneum near Naples, which hiftory 
informs us was deftroyed by a volcano 
during an earthquake. 
SECT. CCC. 
Observations on the preceding Slags. 
- It feems as if we could not go any farther in the 
arrangement of bodies belonging to the mineral 
kingdom, than to the black mould (Sedt. ccxciii.) 
and the flags, as being the extremes. 
However, if thele flags likewife decay,- and in 
length of time become an earth, which poflibly 
may happen •, there is then a new fii bilance be-* 
yond them, which however may return back and 
circulate again in fome known form. It is ob- 
vious how the old heaps of flags from the iron 
furnaces 
