1complete knowledge of the
method of making all underground works
Lastly, there are the various systems of assaying5 substances and o
preparing them for smelting; and here again there are many altogether
diverse methods. For there is one method for gold and silver, another
for copper, another for quicksilver, another for iron, another for lead, and
Lastly, there are the various systems of assaying5 substances and o
preparing them for smelting; and here again there are many altogether
diverse methods. For there is one method for gold and silver, another
for copper, another for quicksilver, another for iron, another for lead, and
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