378 



SOUTHERN FIELD CROPS 



their contemporaries of nearly all nationalities to the 

 southward grew and used this plant in countries where in 

 modern times its culture has made relatively little progress. 

 Cotton manufacturing was greatly stimulated by the 

 inventions of Arkwright, Crompton, Cartwright, and Watt 



FIG. 164. THE PROPELLING MECHANISM OF AN OLD HORSE-POWER GIN. 



Showing large wheels with wooden cogs. (By permission of D. A. 

 Tompkins.) 



in the eighteenth century. To supply the demand for 

 raw cotton thus stimulated, cotton culture was extended 

 in India, along the shores of the Mediterranean, and in 



