321 
Part III. Of Stones Irregular. 
fmall {parks of a yellowifh Spar. Of kin to thefe, feems to 
be. 
A piece of Gold-colour’d Stone, from a Vein of the) 
fame, found in digging a Trench in New England. 
SOAP-STONE: Steatites. Given by Dr. Richard Lower 
Taken from a Rock of the fame in Cornwall. Somewhat 
different from that defcribed by Boetius. Confiding of 
parts white, red, purple, and green mixed together, as in 
Cajlile-Soap 3 and feeming, like hard Suet , greafie to the 
touch: whence the reafon of both the Names. Yet is it not 
at all diffoluble either in Oil or Water. Nor in any indiffe¬ 
rent Fire 5 by which it only becomes fomewhat harder 
and whiter. It feems to me to be much of the nature (for 
fubftance) of the Lap. Amianthus 3 and that it is the Mother 
of it. 
A foftilh Dirt-colour’d STONE ( Sdxi Limofi Species) 
from Staffordfhire. Of which thofe Pots arc there made, 
wherein they melt their Glafs. 
The Red CAULE (a Stone fo call’d about the Tin Mi ties 
in Cornwall) beaten to powder, and made up into a Ball with 
water. Of a faint red like that of a wither’d Pink. Ano¬ 
ther of a purplifh Brown, with black finning fparks. 
A bafe Slate , i. e. neither of one colour, nor good 
Grain. 
An afh-colour’d PUMIS STONE. There arealfo whitifh 
ones 3 and fome Black, as in Sicily. Where, and at Vefuvius, 
amongft other places, they are frequently found. The 
fmootheft are, or heretofore were, ufed by the Germans to 
rub the skin, in their Baths, (a) ( a ) Boet. de 
A CINDER from Mount Aetna 5 of a blackilli colour, Gctr ' ,& * 
homogeneous fubftance, and fomething metallick. Quite 
through full of great Bubles. ’Tis ground to a long Oval 
Figure. 
ANOTHER, much more denfe, and ponderous like Iron 
Ore. Given by Sig r . Boccone. 
r A THIRD, in fome part vitrify cl. Of the Burning and 
Eruptions of this Mountain we have a copious Hiftory given 
us by J. Alph. Borelli. 
A Vitrify’d CYNDER, taken out of the Ruines of this 
City by the late general Fire,and kept as a Memorial of it. 
T t Sect, 
