Part III. Of Stones Irregular. 321 
fmall fparks 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 
Caftile-Soap 5 and feeming, like hard Suet, greafie to the 
touch : whence the reafon of both the Names. Yet is it not 
at all diflbluble 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 
iiibftance) of the Lap. Amianthus 3 and that it is the Mother 
of it. 
A foftifh Dirt- colour d STONE (Saxi Limofi Species) 
from Stafford/hire. Of which thofe Pots are there made, 
wherein they melt their Glafs. 
The Red CAULE (a Stone fo call'd about the Tin Mines 
in Cornwall) beaten to powder, and made up into a Ball with 
water. Of a faint red like that of a wither d Vink. Ano- 
ther of a purplifh Brown, with black fhining fparks. 
A bafe Slate , i. e. neither of one colour , nor good 
Grain. 
An afh-colour'd PUMIS STONE. There are alfo 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, ufcd by the Germans to 
rub the skin, in their Baths, (a) U) Boet. de 
A CYNDER from Mount /Etna - of a blackifli colour, Gem ' &L 
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. 
A THIRD, in fome part vitrify 'd. 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. 
Sect. 
