LIFE ON COASTAL PLAINS 



547 



powers developed, but there is not the fall necessary for 

 large factories, except sometimes in the hilly region back 

 near the old land where the rivers have developed rather 

 deep and narrow valleys, and mill ponds of considerable 

 size may be made. 



As the different kinds of soil lie in belts, agriculture will 

 vary with the belts. In warm climates rice can be raised 

 along the shore where the -land is marshy. On the sandy 

 land most profitable 

 truck farming is pos- 

 sible if the transpor- 

 tation facilities are 

 good. In many 

 places in the south- 

 ern states these sandy 

 areas support fine 

 forests of pine (page 

 344), which are most 

 valuable for the pro- 

 duction of turpen- 

 tine, tar, and lumber. 

 Where the soil is not 



too sandy and the climate is warm, cotton is raised in 

 abundance. The materials for making glass, pottery, and 

 brick are widespread over coastal plains. 



The cities on coastal plains are usually found either 

 (1) near the coast, where the rivers have formed harbors 

 and so have made ocean commerce possible, or (2) at the 

 head of navigation in the rivers where water transporta- 

 tion begins, or (3) still farther up the river at the fall line, 

 where manufacturing on a large scale is possible. 



The fall line is the point on a river where its bed passes 



CRUDE TURPENTINE STILL 



Turpentine is distilled from the pitch of 

 the pine. 



