NOTES ON ALUNITE, PSILOMELANITE, 

 AND TITANITE 



BY 

 EDGAR T. WHERRY 



Assistant Curator, Division of Mineralogy and Petrology 



No. 2145.— From the Proceedings of the United States National Museur 

 Vol.51, pages 81-88 



Published October 16, 1916 



Washington 



Government Printing Office 



1916 



