BULLETIN OF THE UNIVERSITY OF WISCONSIN 



SCIENCE SERIES, VOL 1, No. 4, PP. 109-156, PLS. 4-8. 



A CONTRIBUTION TO THE MINERALOGY OF 

 WISCONSIN. 





WILLIAM HERBERT HOBBS 



Assistant Professor of Mineralogy and Petrology 



PUBLISHED BY AUTHORITY OF LAW AND WITH THE APPROVAL OF 

 THE REGENTS OF THE UNIVERSITY 



MADISON, WIS. 



PUBLISHED BY THE UNIVERSITY 

 JUNE, 1895 



PRICE 40 CENTS 



