22 ; Russell R. Spafford 
temperate conditions, would be a normal amount of productive 
labor. 
(f) Capital in arctic regions includes little more than a crude 
home, land of extremely low value, dogs, and a few implements. 
In temperate regions capital includes a better home, valuable land, 
A Muintd ity. 
Ing i 
N 
2 
3 
y 
Q 
N 
iN 
NS 
BN 
: 
5 
Termperate Agricu/ture. Within 
Cold Deserrs Criffeo/ Lines. 
Hot Deserts Irrigated Districts. 
: Valley Lands jn Dry Pegions. 
Fic. 26. The relation of artificial factors to climate and plant growth. 
more domestic animals, improved implements, and a valued in- 
terest in many devices for keeping in touch with people over a 
wide area. In the tropics capital drops back to a level compar- 
able with that in arctic regions. 
D2 
