GEOLOGICAL SURVEY OF THE TERRITORIES. 



811 



o 

 The mean temperature at Helena, Montana, for 1SG6, was 44.5 



The mean temperature at Deer Lodge, Montana, for 1868 40.5 



The mean temperature at Deer Lodge, Montana, for 1809 4'J.9 



The mean temperature at Deer Lodge, Montana, for 1870 42.1 



Tlie mean temperature at Deer Lodge, Montana, for 1871 42.5 



The mean temperature at Helena, Montana, for January, 1807 . . . 17.9 



The mean temperature at Helena, Montana, for February, 1867.. 18.0 



The mean temperature at Helena, Montana, for March, 1867 5.9 



Tiie mean temperature at Helena, Montana, for April, 1867 ...... 44.8 



Tli'fe mean temperature at Deer Lodge, Montana, for i^ovember, 1867 30.5 



The mean temperature at Helena, Montana, for December, 1807. . 25.2 



The fall of rain and melted snow at Helena, in 1800, inches 22.96 



The fall of rain and melted snow at Deer Lodge, in 1870, inches. . 10.50 



The fall of rain and melted snow at Deer Lodge, in 1871, inches. . 15.74 



The average Ml of rain and melted snow at Deer Lodge for four 

 years, 19.11 inches. 



A series of observations shows that Missoula County, Montana, (alti- 

 tude 3,300 feet,) enjoys an average temperature of 5°.5 higher than Deer 

 Lodge, and, judging- by farm products, this is about the annual mean of 

 the large valleys of Sun River, Missouri, Gallhtin, Jefferson, Madison, 

 Stinking Water, and Beaverhead. It thus appears that by far the greater 

 part of the Territory has an annual mean temperature of about 48°. 



RESUME OF METEOROLOGICAL OBSERVATIONS TAKEIT AT 

 FORT ELLIS, MONTANA, BY THE UNITED STATES MEDI- 

 CAL DEPARTMENT. 



