Bulletin of the Museum of Comparative Zoölogy 
AT HARVARD COLLEGE. 
Vor. XLIX. 
GEOLOGICAL SERIES, Vol. VIII, No. 5. 
AN OCCURRENCE OF HARNEY GRANITE IN THE 
NORTHERN BLACK HILLS. 
By Henry Q. FERGUSON AND Fremont N. TURGEON. 
Wire THREE PLATES. 
CAMBRIDGE, MASS., U. S. A.: 
PRINTED FOR THE MUSEUM, 
FEBRUARY, 1908. 
