Georgius Agricola,
De re metallica — Book I
(1912)
“ Again, those who condemn the mining industry say that it is not in the least stable, and they glorify agriculture beyond measure. But I do not see how they can say this with truth, for the silver-mines at Freiberg in Meissen remain still unexhausted after 400 years, and the lead mines of Goslar after 600 years. ”
