Polar Regions in the Twentieth Century 
valley, as far as Coldfoot, 68° N., gardening is 
successful. 
Opinions differ as to the lines on which Alaska 
will materially develop, but in any event there are 
in Arctic Alaska thousands of natives, who, pre- 
viously nomadic and occasionally famine stricken, 
have become industrious and self-supporting com- 
munities, holding their own and. growing in im- 
portance. 
[56]