121x931. 



Calif. Dept. of nat- 

 ural resources. Div, 

 of mines, 



PHYSICAL 

 SCIENCES 

 LIBRARY 



TN2U 

 C3 

 A3 

 no. 10 



TN£4- 



LIBRARY 

 OmVERSITY OF cAUfcmmB 



DAVIS 



124932 



