Part III. Of Stones Irregular. 
fmall fparks of a yellowifh Spar. Of kin to thefe, feems to 
be. r 
• A piece of Gold-cofound 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 defciibed by Boefius. Confifting 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 fo me what harder 
and whiter. It feems to me to be much of the nature ( for 
fubftance) of the Lap. Amia?ithus 5 and that it is the Mother 
of it. 
A foftifti Dirt- colour d STONE ( Saxi Limofi Species) 
from Stajfordjhire. 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 withered Pink. Ano- 
ther of a purplifh Brown, with black (hining fparks. 
A bafe Slate , i. e. neither of one colour ? nor good 
Grain. 
An afli-colour d PUMIS STONE. There are alfo whitifh 
ones 3 and fome Black, as in Sicily. Where, and at Vefuviw, 
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 CYNDER from Mount Atna- of a blackifh 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. Alpb. 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. 
Tt 
Sect, 
