Note 11 — BOOK I.
Herbert Hoover translation
In Veteribus et Novis Metallis, and Bermannus, Agricola states that the mines of Schemnitz were worked 800 years before that time (1530), or about 750 A.D., and, further, [Pg 6]that the lead mines of Goslar in the Hartz were worked by Otho the Great (936-973), and that the silver mines at Freiberg were discovered during the rule of Prince Otho (about 1170). To continue the argument to-day we could add about 360 years more of life to the mines of Goslar and Freiberg. See also Note 16, p. 36, and note 19, p. 37.