Livro - Biringuccio - 09-1002-0

4 PIROTECHNIA
BOOK THREE
[ASSAYING AND PREPARING ORES FOR SMELTING]
PefaeI
Chapter I The method of assaying the ores of all metals in general, and
in particular those containing silver and gold.
2 The method of preparing ores before smelting.
3 The common forms of blast furnaces and other kces
for
smelting ores.
4 The method followed in smelting ores.
5 The method by which lead, silver, and gold are separated
from copper when they are all in one mass resulting fiom
the smelting of ores or otherwise.
6 The method of refking silver on the cupel; the arrangement
of weights, and the method of finishing the assay of gold
and silver more skilhlly.
7 The method of making cupeling hearths for refining silver
in quantity.
8 The method of refining matte and converting it into fine
copper.
9 The method of smelting litharge and reducing it to pure
lead.
10 The properties of charcoal and the different kinds of it.
BOOK FOUR
[THE SEPARATION OF GOLD FROM SILVER]
PefaeI
Chapter I The method of making the common acid for parting gold
fiom silver.
2 The method of assaying silver containing a quantity of gold.
3 The proper method and procedure in parting gold perfectly
fiom silver in quantity, by means of acid.
4 The method of retrieving silver and good acid from the precipitates
fiom acids.
5 Precautions that must be observed in parting gold from
silver with acids.
6 The method of parting gold fiom silver by means of sulphur
or antimony.
7 The method of cementing gold and bringing it to its ultimate
fineness.
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