8 
Bulletin 55. 
Figure 5. 
June 2 it was more marked, and still more so on June 3. For the rest 
of the week it was scarcely noticeable. The days of June 1 and 2 were 
sunny, the two following days were rainy, and the rest of the week 
cloudy. On the night of June 3-4, 1.12 inches of rain fell at the Sta¬ 
tion, an unusually heavy rainfall, yet the river was lower after this rain 
than before. The clouds protected the snow from the sun, and this was 
of more effect than the exceptional rain. 
Another record illustrating the effect of a general cloudiness, is for 
the last week in May, 1897, shown in Fig. 6. The flow for this week was 
normal, except on the 28th, when the river lacked the fluctuation evident 
on the other days. This was due to the character of June 27. It was cloudy 
and rainy all day at Fort Collins, and also over the whole watershed. 
The precipitation at the Station amounted to .28 in. There were hard 
showers near the river, as shown by the slight rise on the afternoon 
of the 27th. At Westlake, at an elevation of about 8,500 feet and about 
the middle of the watershed, the precipitation was .80 in. Notwith¬ 
standing this heavy rainfall the river shows a steady decrease. The dot- 
