n 



of Lag Gravels. 



Rottom of a 

 "blow-out," 

 AlUaDce, Neb. 



From renr of 



duBP. Micbi^an 



City, Ind. 



From wlnd- 



eroded jyround. 



Ardraore, S. Dak 



From rpRr of 



ft dune, 



New Boston, Ille 



From a "blow- 

 out". 

 Alliance, Keb. 



Avern|L;e. 



4.2 

 28.0 

 19.9 

 15.2 

 31.5 

 .4 



26.1 



G2.6 



19.3 



1.4 



^ 



• 1 



1.6 



12.6 

 23.8 

 25.1 

 1G.9 

 IG.l 



y.5 



9 



of Rolling 



Drift Sand. 













16 1 17 



18 



19 



30 





Rear slope oT a 



Rear elope of a 



Kear Rlope of a 



Snnd Drift, 



Sand drift, 



Average. 



dune, 



dune. 



dune. 



Grigeeco., 



Griggfl CO.. 





Hooppole, Ills. 



Hooppole, IllB. 



Hooppole, Ills. 



N. Uak. 



N. Dak. 







o 







.3 



tr. 

 .5 



12.4 1 



9.7 1 



G.2| 



19.3 I 



14.0 



i 



27.8 k 



34.6 ■ 



44.4 ■ 



39.2 ■ 



45.2 ■ 



42.9 



33.5 ■ 



33.0 ■ 



40.7 ■ 



29.4 ■ 



30.7 |f 



37.9 



25.3 W 



17.2 1 



4.0 f 



23.4 ■ 



2.4 



2.5 





5 5 P 



2.0 1 



.3 



1.2 " 



.4 

 tr. 



1.8 

 .3 





tr. 



