Notes oil the Dispersion of Drift Copper. 45 



In Missouri, specimens, on the authority of G. C. Brod- 

 head, State Geologist, have been found in the eastern part of 

 Putnam county.' 



In Iowa, Dr. White has noted the occurence -^f copper iti 

 various parts of the state, and a single bowlder mass 

 weighing upward of 30 pounds, has been taken from the 

 drift in Lucas county." In Lee and Henry counties, the oc- 

 currence of the metal in question is recorded by Prof. 

 Worth en.' 



In Minnesota, copper has been found in Fillmore county,* 

 and at Pleasant Grove, in Olmstead county. In a descrip- 

 tion of Travers county, Mr. J . O. Barrett, speaks of its occur- 

 rence, but his language is somewhat ambiguous, and it is 

 uncertain Avhether the copper referred to belongs to the 

 county under description, or to the coteau in the adjacent 

 part of Dakota. 



Prof. G. D. Swezey, of Doane College, JSTebraska, informs 

 me that it is current report that copper has been found in 

 small fragments in Nebraska, but he is unable to give lo- 

 calities. 



In Michigan, a mass of copper was found at Northport, 

 Leelenaw county, which was sold for $80, and hence must 

 have been of great size. In Benzie, Antrim and Grand Trav-. 

 erse counties also, copper has been frequently met with. Col. 

 Whittlesey speaks of a specimen the size of a man's hst, 

 from Ada, Kent county, with frequent smaller fragments. 



In Wisconsin, Dr. Lapham says ' that in the form of drift 

 bowlders copper is often found in eastern Wisconsin, the 

 masses varying from a few ounces to several hundred 

 pounds. The largest, near Huntsford, in Dodge county, 

 had a weight of four hundred and eighty seven pounds. 

 Prof. Chamberlin " states that copper is frequently foimd 

 at all points along the Kettle range. 



' Geological Survej^ of Missouri, p. 289. 



- Vol. I, Geological Survey of Iowa, 1870, p. 96. 



^ Geological Report of Iowa, 1878, p. 178. 



•* N. H. Wmcheirs Heport of 1875, p. 71. 



° Wisconsin Geological Report, vol. 3, p. 27. 



* Geological Report of Wisconsin, vol. 2, p. 210. 



