35° 
Of Tin, Lead, and Iron. Part III. 
colour of a Calcedony. Fen ant. Imperato hath one which 
he entitles Ingemmamento di Piombo 5 and feems to be like 
this. 
SPARKS of LEAD ORE in the Caulk One of the 
Sparks is branched almoft like a fmall Leafe. The Stone or 
Caulks is a Congeries of white Cryftals of Spar laid crofs 
every way. They will cut Glafs. 
A large piece of LEAD ORE, flaky, and lying in fpots 
in a white perfpicuous, flaked, and foft Spar. 
Some other pieces of Lead Ore, Englijh. 
LEAD ORE, from Freiungen, called WEISS ER FLIES. 
It confifteth of a foft and friable Spar, of a pale colour, near 
that of the Diaphanous natural Sulphur -, together with a 
redifh fubftance mtermixt. 
LEAD ORE, from the fame place, called Schlich. 'Tis 
a fine grey Sand, like that ufed for Writings : with fome 
few black Grains 5 which is, I fuppofe, the true Ore. 
A large piece of LITHARGE ( of Silver.) 
See a large and accurate Account of the Mendip Lead 
CO Num.28. Mines in the Phil. Tranfattions $ (a) . communicated by 
j9 ' Dr. J of. Glanvile. 
Lead (befides the ufes commonly known ) is alfo em- 
ployed for the Refining of Gold and Silver by the Cupel. 
Hereof is made common Cerufs with Vinegar. The way 
(b) Lib. de briefly, yet perfpicuoully fet down by Theophraftus. (b) Of 
Lap * Cerujs, Red Lead. Of Plumbum uftum, the beft yellow Ochre. 
Of Lead and * as much Tin, Solder for Lead. Hereof are 
alfo made the like Chymical Preparations, as of other Me- 
tals, as the Oil, Tin&ure, Salt, is'c. Some of which, many 
bold Chymifts, without Difcretion, give inwardly, and alfo 
extol them. But thofe that are careful of their Health, will 
beware of them. I do not deny, but that 'tis poffible this 
Metal, as well as Mercury, may be fo order d and given, 
as to be innoxious. 
BRUSH-IRON, Native or from the Mine. It confifteth 
of ftrait, round, long Styri*, about the thicknefs of a fmall 
Kniting-Pin, bolt upright, like the Briftles of a ftiff Brufb, 
or the Teeth of a Wooll-Comb. They grow on a double-Bed, 
the uppermoft of an Iron-colour, the undermoft of a dark 
yellowiih red. 
BRUSH ORE 5 From Doward in Herefordjhire . Given 
