Part III. Of Tin, Lead, and Iron. 
with fome fparks of Metal. It feems near as heavy as the 
pure Tin it felf. 
CHIMNEY-TIN, forced up from the Herd. Tis black 
fhining and heavy 5 alnioft like very fine black fand. 
A Metalline Slat from the Tin-Mines. 
See a large Account of the Tin-Mines of Cornwall and 
Devon/hire, 111 the PhiL Tranf anions 5 (a) communicated 60 Num.5? 
by a Perfon much converfant among them. As alfo ano- 
ther accurate one particularly of thofe in Cornwall 3 com- 
municated by Dr. Chi fief her Menet, and by Me publifhed 
in the fold Tra?ifatlio?is. (b) (}) Nubw 
Tin is mixed with Copper, in the making of Metal for 
Bells, Organ-Pipes^c. the proportion of Tin to Copper, as 
two to feven, or thereabout. If under, it will be too foft 3 
if over* too brittle. The Metal ufed for Concaves and Spe- 
adums, is like wife a Mixture of Tin and Copper. Of Tin, 
with Lead, and the Marchafite of Antimony of each * th part, 
is made one fort of Printing Letters. Of this Metal is 
made that fort of Cemfs, called Spanijh White $ one of the 
belt,ufed either by Pai?iters,or by Women. St annum uftum, 
the beft prefervative of the polifh of Metallic/^ Concaves, and 
the like. Riverim (c) highly commends his Bezoardicum C<0 obferv. 
Jovis againft Malignant Feavers: A Mixture againft thcobf.55. 
Bitings of iVW Dogs, confiding chiefly of Mithridate and 
the Filings of Tin, is much ufed and relied upon by fome 
Himtfmen. 
CRYSTALLINE LEAD, from the Mine. So I call it, 
not that it is clear, but confifteth for the moft part of Hexa- 
gonal Points. Of the bignefs of a midling Apple. 
LEAD ORE, rich in SILVER. Given by Sir R. Moray, 
'Tis of the ufual colour, but mixed with white Spar, fo hard 
as to cut Glafs. And I fuppofe, that moft Lead Ores with 
fuch a Spar, have Silver in them. 
LEAD ORE holding SILVER , and growing together 
With Iron Ore. 
LEAD ORE, probably alfo holding Silver. It lies in a 
whitifh Spar, which is not fo flaky as is ufual, and will cut 
Glafs. 
LEAD ORE holding SILVER, with a large CryftaUine 
Spar confifting chiefly of Hexagonal Points , and of the 
U u colour 
