LIFE AS AFFECTED BY CLIMATE 



259 



tages. These spots are of limited extent and frequently 

 of limited moisture. They are often separated by almost 

 untraversable areas from the other inhabitants of the world. 

 There can be but little commerce or intercourse with the 



A DESERT AND OASIS. 

 Notice the oasis at the foot of the gully where a spring comes to the surface. 



rest of mankind. Although the oasis may appeal with a 

 poetic charm to the dweller in the desert, yet to the inhab- 

 itant of a fertile country it is but a sorry place. 



In regions where there is plenty of moisture, sunlight 

 and heat, the growth of plants and animals is abundant and 

 is only limited by space and food. Here life is at its best. 



