Part III. Of Regular Stoner. 
Windows , inltead of Glafs. Ambrofinus (a) mentions a (a) Ubi 
Lead-colour d fort fo big, as to make not only Tiles, but 
Tables. , |, 
The BONONIAN STONE, Prepared and given by - 
Fr.Willughby Efq;. ’Tis fomewhat fiffile, and may be here 
ranked. Now of a greyifh colour, and in fome places like 
the RombicT Lead-Spar. No Acid will touch i t. Its qua¬ 
lity of ihining in the Dark, after its being expofed a little 
while to the Sun, is now loft. See the manner of its prepa¬ 
ration in Wormius. Given in Powder, (b) or the infufion W Mu . f - 
of it, after calcin’d, is a ftrong Emetic 4 Wormian 
An odd SPAR, Green by day 5 by Candle-light of an 
Amethyftine colour. Softer than to cut Glafs, yet harder 
than the common Rhombick Lead-Spar. 
A FLORENTINE SLATE. A fort of Saxum fiffile. 
Hereon is naturally reprefented the PROSPECT of a City, 
Houfes, Churches and Steeples, ftanding in length. To 
make them all vifible, it mutt be wetted. 
ANOTHER, with the PROSPECT of a TOWN, lying 
round upon the fide of a Hill. 
Another with the like PROSPECT; but (hewing it, as - 
at a much greater diftance. 
Another, with one half of the TOWN on a Rock, the 
other in a Plain. There are fome of this kind in Sept alius?. 
Mufaum. 
A SALTRAM SLATE. Very like to Efford-fiate (ufed 
for Writing,and Mathematick Schemes) but not all out fo 
good. 
An odd SLATE with yellow Mundick in fmall Grains 
or Sparks immerced throughout the body of it, 
RUMPLEY-STONE. A common blewifh Slate, for 
colour and fubftance. But excelleth, in that it rifes large 
enough for Building. It may be cleft as thin as you pleafe. 
A kind of whitifh Slate, mixed with a rufty Iron-colour; 
plentiful ih fome Mines. 
Some others 5 one grey and fpotted with tawny. 
Another, of a brown Purple. A Third, Red. Thefe abound 
in the High-Ways about the Mines in Cornwall. With thefe 
may be placed. 
The WAXEN VEIN. Ludus Helmontij. AStonecom- 
pofed of two diftindf Bodies. One, and the far greater, is 
of 
