ERRATA. 



Page 104, 5th line from bottom, for " them " read " those." 

 105, hist line on page, for " ghicy " read " glassy." 

 108, 5tli line from top, place colon after " Wisconsin." 

 lOsi 8th line from top, and wherever else it occurs, for " copper 

 bearing rocks," read " Copper-Bearing." 



108, 9th line from top, for " lower silurian " read " Lower Silu- 



rian." 



109, 7th line from top, for " rivers," read " rivers, — " 

 109, last line, for " its " read " their." 



Ill, 5th line from top, for ' schists, one " read " schists. One." 

 Ill, 4th line from bottom, for " feet, a " read " teet. A." 

 Ill, 4th " " erase " its." 



112' 17th " " for "Keweenau" read "Keweenaw." 



II2I 8th " " for " northeasterly " read " northerly." 



116* 15th " " for " occupies" read "occupy." 



118, IBth " " for " it" read "they." 



126 19th " " for " coglomerato " read "conglomer- 



ate."' 

 127,12th " " for "d if;" read "drift." 



132^ 11th " " for "phenomena" read "phenome- 



non." 

 135, 7th " " for " five " read " fine." 



141, 7th " top, for "silver. And " read "silver; and." 



143, 14th " bottom, and elsewhere, for "tertiary" read 



" Tertiary." 

 143, 9th and 10th line from bottom, for ""tcstiary "read "Tertiary." 

 150, 14th line from top, for " mates " read " mats." 

 150, last line, after " sand" insert "above." 

 152, 5th line from below, for "they" read " it." 

 193-202, wherever it occurs, for " Bouy's " read " Prony's." 

 198, 15th line from bottom, for " Hetz " read " Metz." 

 237, 6th line and elsewhere, for "Earl " read "Eorl." 



