( 6x6 ) 
13- I repeated all the former Experiments with the 
MenHruums upon this Sand after Calcination per feinz 
Crucible, but could fcarce obferve a Bubble prod uc'd by 
any of them. 
14. I pour'd fome of each of the Liquors upon Par- 
cels of the Powder of this Sand calcin'd, without any 
Succefs. 
Note, That I made thefe Experiments both in the 
Cold, and upon a Sand Furnace. So that to me there 
feems to be but little wanting to difcover any Metal 
known to us, if it contain'd any (uch : For there is no 
Metal nor Oar that feme of theft Menftruums will not 
work on. 
1 5*. I powder'd a Fragment of a Load-ftone , and 
pour'd fbme of thefe Menflruums upon it, without being 
able to find that they in the leaft prey'd upon it , any 
more than they did upon the Sand. 
16. I pour'd fome of the afore-mentioned Menflru- 
ums upon ordinary Sand taken out of a Sand Furnace, 
where it muft have fuffer'd fome Calcination, but could 
find no more Bubbles produc d thereby, than what might 
rationally be fuppos'd to be produe'd from time, and 
other Dirt mixt with the Sand. 
II. A 
