The question is either de nomine, whether it be fit to call them holy; or de re, whether they have that which is called holiness.
We do not present de re Metallica as a work of "practical" value.
In the mean time note, that the question is but de nomine here, whether the name church be fit for other societies, and not de re.
Nowhere in de re Metallica does the author explain these substances.
In order to accomplish this, he wrote a text-book of architecture, "de re aedificatoria."
The classification of veins is the same as in de re Metallica.
"de re Metallica" was the standard manual of mining and metallurgy for 180 years.
Biringuccio gives very little information on tin metallurgy, and we are brought to de re Metallica for the first clear exposition.
We still have his de re Rustica, a collection of maxims loosely strung together.
It may be noted that two whole lines from this paragraph are omitted in the editions of de re Metallica after 1600.