CONTENTS 
Page. 
Letter of transmittal, by G. F. Becker 5 
Prefatory note, by F. W. Clarke 7 
On earnotite and associated vanadiferous minerals in western Colorado, by 
W. F. Hillebrand and F. Leslie Ransome 9 
Some additions to the alunite-jarosite group of minerals, by W. F. Hillebrand 
and S. L. Penfield 32 
Minerals from the Clifton-Morenci district, Arizona, by Waldemar Lindgren 
and W. F. Hillebrand 42 
Two tellurium minerals from Colorado, by W. F. Hillebrand 55 
Notes on lawsonite, by W. T. Schaller and W. F. Hillebrand 58 
The composition of yttrialite, with a criticism of the formula assigned to 
thalenite, by W. F. Hillebrand 61 
A pseudo-serpentine from Stevens County, Wash., by F. W. Clarke 69 
On " calif ornite," by F. W. Clarke and George Steiger 72 
The action of silver nitrate and thallous nitrate upon certain natural silicates, 
by George Steiger 75 
Dumortierite, by W. T. Schaller 91 
Mineralogical notes, by W. T. Schaller 121 
Index 145 
3 
