Fig. io. — "Wind timber" on the east shore. The birches and willows here form 

 a thick, matted growth upon which it is even possible to walk. The prevailing direction 

 of the wind is seen to be from the west, as is evidenced by the absence of projecting branches 

 on the west side of the two large Engelmann spruces. Photograph by Mr. (1. S. Dodds. 



Fig. ii. — Large snowdrift on the moraine east of the lake, June 6, igoS. Small 

 drifts remain about the lake until July i. Sibbaldia procumbens grows in the loose soil 

 kept moist by the melting of the snow. This ridge is exposed and would be dry if it were 



not for the snow which collects there every year. Photograph by Mr. (',. S. Dodds. 



Redrock Lake near Ward, Colorado 



ill!) 



