BULL, DEPT, GEOL. UNIV. CAL. 



VOL. 4, PL. 35 



100' 130* 140* 100° 180* 100- HO" 



100* 120* IW W0° 190* 180* 140° 120* 



A. Minimum Surface Temperatures, after Sir John Murray. 



B. Annual Eange of Surface Temperatures, after Sir John Murray. 



