50 



iVisconsin Academy of Sciences, Arts and Letters. 



to strike. It was found eight feet below the surface. It is 

 further asserted that " f ra.gments of copper were found all 

 the way down." This interesting specimen is " about two 

 inches thick, having an area of about one square foot. It 

 looked as if it had been melted. There were spots of green 

 carbonate upon it;' when seen by Prof. McKeever, but these, 

 he suggests may have formed since it was found. From 

 Wisconsin, Mrs. G. W. Esterley, in an article in the Evening 

 Wisconsin, reports the finding of a piece of thin, flat copper 

 insinuated among the beds of Trenton limestone, in a quarry 

 near Lake Koshkonong. Prof. Chamberlin reports a similar 

 case of insinuation in Galena limestone near Belvidere, 111. 



Professor H. E. Sfcorrs writes from Jacksonville, Illinois, 

 that a fragment of copper was some time since found 

 twenty-five feet below the surface, in digging a well in that 

 city; the same being three inches long by one and one-half 

 broad, and one-fourth of an inch thick. The same gentle- 

 man also speaks of two other specimens of copper in his pos- 

 session, weighing six and one-half ounces, and four pounds, 

 three ounces respectively, the second being " evidently worn 

 in transit." The precise localities of these two specimens is 

 unknown. "A small piece of native copper was found . . . 

 in the city of Alton, ... in loss," according to Professor 

 Charles Fairman, who also adds that it is locally reported 

 that large bowlders containing copper were formerly found 

 in that locality. 



Professor N. H. Winchell, furnishes the following facts 

 concerning drift copper in Minnesota: 



state. 



Minnesota . 

 Minnesota . 

 Minnesota . 

 Minnesota , 

 Minnesota . 

 Minnesota . 



Minnesota 



Minnesota . 

 Minnesota . 

 Minnesota . 



Minnesota , 



County. 



Le Sueur. . 



Scott 



Scott 



Hennepin . 

 Hennepin 

 Olmste'ad . 



Olnistead. 



Olmstead. . 

 Ramsey . . . 

 St. Louis 

 Carlton. . 



Pine. 



and 



Town. 



Le Sueur 



Jordan 



Blarian 



Minneapolis. 

 Eden Prairie. 

 Rochester . . . 



Zumbrota , 



Pine Island 



White Bear 



Knife Falls t o 

 N. Pacific June 



Various places. 



Size of 

 Specimens. 



3 pounds . . 

 "8 pounds.* 



4 ouDces. . 



.5 pounds . 



% pound 



2 pounds... 



Hundreds. 



of pieces. 



Condition. 



Rounded. 



Rounded . 



Rounded 

 and cor- 

 roded . . . 



Rounded . 



Rounded . 



Formation 



Gravel. 



Among 

 stones near 

 the rock. 



On surface. 

 Near surface 



Among 

 stones and 

 rounded 

 bowlders. 



? 



* Found in a raOi'oad cut, 



