13-2 
A SYSTEM OF 
This verges more to the blu’^ 
than to the green colour. It m 
made at Falikm in Dalarne, from 
the water which is pumped out of 
the copper- mines : in this water 
large criftais of vitriol are often 
ready formed. If this vitriol is 
dipped in water, and afterwards 
rubbed on clean iron, the copper 
does not precipitate from it. 
3. Vitriol of zinc and iron, Vitriolum 
%inco-ferreum.- This is the green 
vitriol from Goflar in the Hartz. 
4. Vitriol of zinc and copper, Vitrio- 
lum ciipreo zinceum. This is the 
blue vitriol from Goflar. 
5. Vitriol of nickel and iron, Vitrio- 
lum ferrum et niccolum continens. 
Is of a deep green colour, and is 
contained in the ochre or decayed 
parts of the Nickel!, at the Cobalt- 
mines at Los, in the province of 
Helhngland*. 
* MoH part of the vitriols owe their formation to art : be*« 
caufe when fuch ores as contain fulphur, are dug out of the 
mines by means of fire, the phlogifton of the fulphur is by 
the heat expelled, leaving the acid behind, which, being lei 
loofe or freed, is thereby enabled to attradi and unite witfe 
watry vapours, diffolving at the fame time the metals ; and ie 
is thus the vitriols are formed. Every fort of ore does not 
commonly decay or weather in a natural manner, without 
being promoted by art | and this decaying or weathering is 
moftiy performed in the open air ; for which reafon no very 
great quantity of vitriol can be expected in that way : for 
when any ore thus weathers or decays, the dilTolved particles 
are by degrees carried off by the rain, and are at laft found 
in a diffoived ftate in certain fprings or mineral waters. Ail 
fuch ores may therefore be called true vitriol ores, as contain 
iron, copper, zinc, and nickel mineralifed with fulphur. The 
acid in the vitriols, however, is not dulcified by the metals,, 
as it is by the alcali in the true neutral falts. 
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