140 



UNIVERSITY OF COLORADO STUDIES 



high-altitude stations in Colorado. Various comparisons are made 

 in the following pages. 



Temperature Records. — The records of the Draper thermograph 

 at Redrock Lake taken during the summer months of 1908 furnish a 

 very complete picture of temperature conditions for the growing season. 



Fig. 5. — Copy of Thermograph Tracings for August 28, 1908, the Hottest 

 Day of the Year. 



The lower line (Redrock Lake) is seen to be much more wavy than the upper (Boul- 

 der) illustrating the fluctuations of temperature so characteristic of mountain climates. 



Since another set of records was made in Boulder at the same time useful 

 comparisons are possible. In 1908 June, July and August at Boulder 

 all showed monthly means about two degrees below normal so that it is 

 probable that temperatures at Redrock Lake were also somewhat 

 below normal. Examination of Table I shows a mean difference each 



