14 DAY USE 



RETURN TO DESK FROM WHICH BORROWED 



EARTH SCIENCES LIBRARY 





This book is due on the last date stamped below, or 



on the date to which renewed. 

 Renewed books are subject to immediate recall. 



NOV18 



iMi 1 7 1936 



AUG 1 1967 



MAY 21 ian 



\Y2ll987 



LD 21-50m-4,'63 

 (D6471slO)476 



General Library 



University of California 



Berkeley 



