352 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



HELENA, UNITED STATES 



Lat 46°34' N. Long. 112°4' W. Hb = 4,124 ft. 



PRESSURE AT STATION LEVEL: COR. TO 0' C. (32° F.) AND TO 



GRAY. AT 45° LAT. 



Means of KG^+IS"), 105th meridian W. 



25 inches + 



Mean .763 .756 .748 .774 



.772 



.779 



.821 



.835 .829 



.844 



.864 



.775 



.797 



TEMPERATURE IN DESREES F. ht = 89 ft. 

 Means of i (daily Max. + daily Min.), corrected to 24 hours 



Mean 22.6 23.3 33.6 43.8 54.7 61.6 70.9 68.1 67.6 46.6 33.3 27.1 45.2 



TOTAL PRECIPITATION IN INCHES, hr = 82 ft. 



Mean 0.45 0.51 0.76 0.76 1.25 1.99 1.04 0.83 0.93 0.89 0.38 0.52 10.81 



