MINERALOGY. 
215 
ments to be made to produce new rrietalKc 
compofitions. 
/. It is difiblved by all the acids ; of thefe the 
vitriolic acid has the ftrongefl: attradion to 
it, yet it does not diffolve it, if it is not 
previoufly diluted with much water. The 
abundance of phlogifton in this femi-metal 
is perhaps the reafon of its ftrong attrac- 
tion to the vitriolic acid. 
g. Quickfilver amalgamates eafiter with zink 
than with copper, by v/hich means it is 
feparated fkom compoiitions made with 
copper, 
L. It feems to become eledrical by fridion, 
and then its Imaller particles are attraded 
-by the loadftone ; which effeds are not 
yet perfedly inveftigated ; but they may 
excite philofophers to make farther expe- 
riments, in order to difcover whether thc- 
eledricai power Ihews itfelf in the metals, 
by being attraded by the loadftone, or 
v/hether the magnetic power can be exerted 
on other metals than iron. 
SECT. CCXXVIIL 
Zink is found. 
In form of calx, Zincam calciforme naturale. 
1. Pure, Miner a zinci c aid for mis pur a, 
a. Indurated, Indurat-a. 
1. Solid. 
2. Criilallifed. 
This is of a whitifti grey colour, 
and ks external appearance is like that 
of a lead fpar ; it cannot be defcribed, 
but is eafily known by an experienced 
eye. It looks very like an artificial 
P 4 giafs 
