BULLETIN OF THE UNIVERSITY OF WISCONSIN 

 Science Series, Vol. 1, No. 4-, pp. 109-156, Pls. 4— 8, June, 1895 



A CONTRIBUTION TO THE MINERALOGY OF 



WISCONSIN.' 



ERRATA 



Bulletin of the University of Wisconsin. Science Series, Vol. I, No. 4 



Page 124, Otli line front bottom. For carbo- octahedrons read 

 cubo-ociahedrons. 



Page 125, Sd line from bottom; also page 126, 6th line from 

 top; and PAGE 155, 9th line from top. For twinning plane lesid 

 composition plane. 



Page 126, lOth line from bottom. For tivinning read lam- 

 ellation. 



ine j^ruse ivimerais rrom tne Hamilton uement Keck at Milwaukee: 

 calcite, pyrite, sphalerite, marcasite, celestite, millerite. 

 Diamonds from the Drift. 



INTRODUCTION. 



So far as I am able to determine, nothing has been pub- 

 lished descriptive of the crystallography of Wisconsin 

 minerals. The minerals of economic importance have re- 



1 Read before the Wisconsin Academy of Sciences, Arts, and Letters, June 8th, 1895. 



(109) 



