u8 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 65 



A comparison of the curve shown in figure 5 with that shown in the Bulletin 

 of the Mount Weather Observatory, 4 : 302, figure 31, shows the surface 

 temperature indicated in figure 5 higher by 6.4 ° C, the minimum temperature 

 lower by 3.5 C, the maximum next above this minimum less than 2° C. 

 lower than the corresponding values shown in figure 31. The minimum tem- 

 perature shown in figure 5 occurs at an altitude higher by 1.5 kilometers than 

 that shown in figure 31. The maximum temperature next above the minimum 



1976 -i 

 496: 



AUE.7. „ 

 4708m S 



%*. 



Fig. 9. — Horizontal projections of the paths of the sounding balloons liberated 

 at Avalon, Cal., July 23-August 10, 1913. 



temperature is shown at about the same altitude in both curves. The curves 

 have the same general appearance. That shown in figure 5 represents summer 

 conditions at latitude 33° N. That shown in figure 31 represents conditions 

 in all seasons, to some extent, the late summer and early autumn being better 

 represented than the other seasons, at about latitude 40 N. 



The variations of humidity with altitude and from day to day are rather 

 closely related to the variations of temperature. In table 3 the absolute 

 humidities observed have been assembled and a mean shown. 



