4. ! flux'd a parcel of this Sand with fix'd Nitre in a 
melting Furnace ior above an Hour, but could obtain no 
Regains, nor any fubftance that would apply to the Mag- 
net, excepting a thin Craft chat (truck firmly to a piece 
of Charcoal that dropt into the Crucible when the mat- 
ter was in fufion. 
5. 1 flux'd it alio with Salt- Peter and powder'd Char- 
coal, dropping pieces of Charcoal afterwards into the 
Crucible. It continu'd about an hour in the melting 
Furnace in fufion, and that without producing a Regulus 
or a Subftance that would apply to the Magnet, excep- 
ting only what ftuck to the Charcoal, as in the former 
Experiment. 
6. I flux'd another parcel of it with Salt-Peter and 
Flowers of Brirnftone, without being able to procure any 
Regulus. 
7. I pour'd good Spirit of Sale on a parcel of this 
Sand, but could obferve no Lu&ation thereby pro- 
duced. 
8. I pour'd Spirit of N.treboth ftrongand weakned 
with Water on parcels of the fame Sand, without being 
able to difcover any Conflict 
9. I pour'dfingle Aquafortis upon another parcel of 
it, without being able to perceive any Ebullition worth 
noting. 
10. I pound double Aquafortis upon another parcel of 
it, which for ought I could difcover had no more effed: 
on it then the former. 
11. I pourd alto fome Aqua Regia on a parcel of it, 
without difcovering any fenfible Effe<5t. 
ii. I pour'd good Oil of Vitr id upon another of this 
Sand, but feeing no Bubbles thereby produced, I weak- 
ned the Oil with Water, but without any fenfible e£ 
fed*. 
