Field Columbian Museum. 



Publication i 29. 



Geological Series. Vol. Ill, No. 7. 



NOTES ON VARIOUS MINERALS 

 IN THE MUSEUM COLLECTION 



By 



Oliver Cummings Farrington, 

 Curator, Department of Geology. 



AND 



Edwin Ward Tillotson, Jr. 



Chicago, U. S. A. 



December i, 1908. 



