C 695- ) 
Lapis Lazuli, 305:4 
An Hone. 3288 
Sardachates. 3598 
A Gratia t. 3978 
A Golden Marcafite. 45 89 
A blew Slate with fhining 
Particles. 35*00 
A mineral (tone, yielding 
i part in 160 Mml.z6$d 
The Metal thence extract- 
ed. 8500 
The (reputed) Silver Ore 
of Wales. 74^4 
The Metal thence extract- 
ed. 1 1087 
Bifmuth. 9859 
Spelter. 7065* 
Spelter Soder. 8362. 
Iron of a Key. 7643 
Steel. 7852 
Caft Brafs. 8100 
Wrought Brafs. 8280 
Hammer'd Brafs. 8349 
A falfe Guinea. 9075 
A true Guinea. 18888 
Sterling Silver. 105 3 5: 
A brafs Half-Crown. 9468 
Electrum, a Britifti Coin, 
12071 
A Gold Coin of Barhary. 
17548 
A Gold Medal from Mo- 
rocco. 184x0 
AMentz Gold Ducat. 18261 
A Gold Coin of Alexan* 
den. 18893 
A Gold Medal of QMary. 
19100 
A Gold Medal of Q.£A~ 
zaleth. 19 125" 
A Medal efteem'd to be 
near fine Gold. 19636 
II. ExtraSis of fame Letters from Mr* John 
Srurdie of Lancafliire concerning Iron Ore ; 
and more particularly of the Haematites, 
wrought into Iron at Miithrop-Ftfrge in that 
County. Communicated by Dr. Martin Lifter, 
S. R. S. 
Towtfley, March 14. 1674. 
S 1R, 
YOU will receive herewith feme of the Cinder you 
defird, as alfo a little of Iron-ftone both burnt 
and unburnt. They have feveral forts of Iron-ftone, and 
cf 
