8 



UNIVERSITY OF MISSOURI STUDIES 



[156 



TABLE 



COMPILED BY DR. FRANCIS RAMALEY 



Summary of data on temperature and rainfall at Boulder, 

 Colorado, for eleven years, ending August, 1908. 



Least rainfall 

 on record. 



January. . . 

 February. 

 March . . . . 



April 



May 



June 



July 



August. . . 

 September. 

 October. . . 

 November . 

 December. 



Annual. . 



1903 



1908 

 1908 



I90I 

 igoo&i905 



1901 



1900 

 iSgg&igoi 

 1905 &1906 



Inc's 



0.08 

 0.09 

 0.23 



1. 71 



o-,5S 

 0.29 

 0.46 

 0.22 

 o.io 

 0.13 

 0.00 

 0.00 



Highest recorded temperature is 97 degrees, July 15, 1902. 

 Lowest recorded temperature is — 20 degrees, January S, 1902, and 

 again February 20, 1905. 



Greatest rainfall recorded, 26.17 inches, 1906. 

 Smallest rainfall recorded, 13.67 inches, 1901. 



Ill ZONES OF VEGETATION* 



There are six great zones of vegetation about Boulder, 

 which, proceeding from east to west, are: A. The Zone of 



*These zones of vegetation are practically those of Robbins (Cli- 

 matology and Vegetation in Colorado, Bot. Gaz., 49, 256-280), who rec- 

 ognized (i) plains, (2) eastern lower foothills and mesas, (3) eastern 

 upper foothills, 6,000 to 8,000 feet, (4) montane zone, (5) subalpine 

 zone, (6) alpine zone. Professor Ramaley, however, would unite the 

 mesas and foothills into one zone (Univ. of Colo. Studies, 6, 50-51). 



