Note to the reader. The map of De L'Isle, on page 20, should be accredited to NeiWs Min- 

 nesota. The sketch of the lead region, which on page 92 is attributed to Dr. D. F. Weinland, 

 should be accredited to Prof. E. Daniels, who was then state geologist of Wisconsin. The sum 

 of money granted Mr.N.C. D. Taylor by the Legislature in 1865 was one thousand dollars in- 

 stead of two thousand (p. 97); and professor James Hall dissents from the opinion of the copper 

 prospects of the St. Croix valley attributed to him by Mr. Taylor. The areas of Cass, Crow 

 Wing, Morrison and Wadena counties, as given in the table on page 114, are stated as they 

 would be, had a change of their boundaries, as proposed by the Legislature, been ratified by the 

 inhabitants; but as the change was voted down by the people, their actual areas should be given 

 as follows: 



ACRES. ACRES. 



Cass county, 1,985,316.23 land; 438,814.34 water. 



Crow Wing county, 325,343.50 land: 42,494.63 water. 



Morrison county, 730,917.20 land; 8,171.77 water. 



Wadena county, 339,397.81 land; 8,524.62 water. 



Elevations in Houston, Winona and Fillmore counties when referred to sea-level, except the 

 average elevation of townships, should be increased eight feet, and the foot-note on page 241 

 should be ignored. On page 361, tenth line from the bottom, for "northwestern " read north- 

 eastern; and on page 362 for " Racine" read Frankford. The bight of the mounds mentioned in 

 Mower county (page 365) is rarely as much as four feet. The thickness of the strata at Hook's 

 quarry, Mantorville, page 373, amounts to 72 feet 10 inches. Head 143 feet, instead of 134 feet, 

 on page 634, for the hight of the hills south of lake Sakata. 



