Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLIV. No. 17. — April, 1909. 



CONTRIBUTIONS FROM THE HARVARD MINERALOGICAL 



MUSEUM. — XIII. 



NOTES ON THE CRYSTALLOGRAPHY OF 

 LEADHILLITE. 



I. LEADHILLITE FROM UTAH. 

 By C. Palache and L. La Forge. 



II. LEADHILLITE FROM NEVADA. 

 By C. Palache. 



With Three Plates. 



