SS ■ White Vitriol 
C H A P. XIII. 
White Vitriol. 
H E White Vitriol from Gojlar in 
JL Germany , as well as that from Hun¬ 
gary, contains fome little Copper, but the 
common Sort with us has no other Metal 
in it befides Iron, unlefs, as fome fup- 
pofe, there is alfo a fmall Quantity of Lead 
or Tin. The Iron contained in the Green 
and White , as well as the Copper in the 
Blue , is not in any conftant Proportion, but 
frequently more or lets in different Pieces of 
the fame Parcel, which occafions fome Va¬ 
riety in Experiments made therewith. 
A Drop of the Solution of white Vi¬ 
triol begins to fhoot at the Edges, by a 
gentle Degree of Heat, either in fmall an¬ 
gular Figures, or minute curvilinear Spi— 
culas, both which are reprefented in Plate 
II. at i, i. The former of thefe fpread- 
Ing conhderably in Breadth, and protrud¬ 
ing very flowly forwards, produce thofe 
lineated Figures fhewn at 2 on one Side 
of the Drop, which are formed by two 
Planes inclining to one another in an An¬ 
gle of about 120 Degrees: the latter, viz. 
the Spicuhz, fp reading like wife and fat¬ 
tening at the Ends, fhew themfelves nearly 
as reprefented by 2 on the contrary Side. 
Some 
