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The works of the highly experienced and famous chymist, John Rudolph Glauber : $b containing, great variety of choice secrets in medicine and alchymy in the working of metallick mines, and the separation of metals: also, various cheap and easie ways of making salt-petre, and improving of barren-land, and the fruits of the earth.Glauber, Johann Rudolf

Science

The works of the highly experienced and famous chymist, John Rudolph Glauber : $b containing, great variety of choice secrets in medicine and alchymy in the working of metallick mines, and the separation of metals: also, various cheap and easie ways of making salt-petre, and improving of barren-land, and the fruits of the earth.

Name: The works of the highly experienced and famous chymist, John Rudolph Glauber : $b containing, great variety of choice secrets in medicine and alchymy in the working of metallick mines, and the separation of metals: also, various cheap and easie ways of making salt-petre, and improving of barren-land, and the fruits of the earth.
Author: Glauber, Johann Rudolf

Glauber, Johann Rudolf

Alchemy -- Early works to 1800; Chemistry -- Early works to 1800; Medicine, Magic, mystic, and spagiric -- Early works to 1800

But that you may see the prerogative of this separation, mark a little,
when you separate by the _Quarto_ and by _Aqua fortis_ you must put
just two or three parts of refined Silver to one of course Gold, where
first the cost and labour of refining the Silver to be melted and
grained with Gold are required: then a good quantity of _Aqua fortis_
to dissolve, precipitate, edulcorate, dry and melt a great deal of
silver. Consider then I pray, the labours and charges of my separation
and the vulgar. When thou separatest with Cements there is need of
boxes, and continual fire of one degree, which labour is tedious for
times sake, and costly for coals, which labour you must twice or
thrice take in regard of the mixt dross. Now again consider the labour
and charges of both separations. When thou separatest by Sulphur and
Antimony, which is the best way, without great charges, if thou knowest
to separate Gold from Antimony without blowing, but this is tedious
because thrice greater labour than our way, tedious indeed by reason
of the difficulty of a perfect separation of Gold and Silver from the
Antimonial dross. Think therefore what way of separation you will use
to refine Gold speedily, surely you will chuse mine.

This way of separation hath also this prerogative, that it hath no need
of refined silver which is done by the benefit of burning, but only its
granulation, solution or separation by the use of _Aqua Fortis_, where
though copper mixt with silver makes wast, yet by the help of this salt
it is soon precipitated. By this means gilt silver is soon separated,
the gold being dissolved by the nitrous spirit, and precipitated with
the aforesaid matter precipitating. As for the separation of gilt
silver which is to be done by help of fusion, and none is easier
done than with Sulphur and Antimony, where when the necessary manual
(ingredients) are known; a great deal is separated in a short time, but
if thou knowest not how to handle Antimony and Sulphur (for which our
Furnace very well befits) leave them, and use the common way; therefore
lay not thy fault afterward on me, writing for thy good.


                  _Of separating the courser metals._

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