16 Russell R. Spafford 
critical lines. It is interesting to observe that the rate of change 
in Europe and Asia is much the same as in America, © 
OCritico/ Cole 
@Crittco/ Mea? 
\C rit ical Raolnlol 
Fig. 17. Critical agricultural lines in Asia. 
In the United States it has been a common experience of thrifty 
farmers from such states as Ohio, Indiana, and Illinois to fail for 
a number of years while learning to farm in regions of low rain- 
fall or low temperature. It is not uncommon in the drier parts 
of the west to-day to hear a farmer say: “I sold my place back 
east and came to this country with enough money for a good start, 
but I lost it all, and now I’m just beginning to make it back.” 
A review of the experiences of such men invariably reveals the 
100° 
