p. 363

384 Dane Co.

Lead mines have been opened on the southern slope of the principal mound which afford in addition to the usual kind of ore another called "white mineral" by the miners,-probably the carbonate of lead. Its external characters are so much unlike the common ore, that its real [character] nature would not be suspected until a more careful examination was made. It is not very abundant, and is [yet] seldom worked as an ore, on this account: the smelters give only half as much for this as for the common ore.