SNOW WAVES AND SNOW-RIPPLES 167 



ally to leeward. The plan of the bank therefore, 

 as in the case of that formed by the clump of 

 bushes, comprised the whole of the head, or 

 entrance, and part of the run, or tail, of the eddy- 



FiG. 20. — Profile and Central Longitudinal Section of same 



Snow Drift. 



curve. Inside the elongated horseshoe bank the 

 ground was quite bare of snow, the black earth 

 of the prairie being visible, and this bare strip ex- 

 tended beyond the place where the horseshoe bank 



Transverse sectionof snowdrift on lee side ofdn outhouse ontbe prairie. 



merged in the general level of the hardened snow, 

 which lay on the prairie to a depth of a few inches . 

 When the wind' was blowing' I watched the 

 long wake of high-whirling snow in the lee of these 



