362 



GENERAL SCIENCE 



American Indians cultivated corn with their crude imple- 

 ments. It is now the largest food crop in the world and 

 more corn can be grown per acre than of any other grain. 



Potatoes are natives of South America. They were 

 cultivated by the Indians and were not used by white 

 people until after the discovery of America. Now they 

 form a large part of man's food. 



HARVESTING SUGAR CANE IN HAWAII 



Most of our large fruits are natives of Europe and 

 Asia. With modern conveniences of transportation and 

 refrigeration it is possible for people in temperate climates 

 to get tropical fruits in large quantity, making oranges 

 and bananas as cheap as apples. Pineapple culture is 

 increasing rapidly and this fruit is now less expensive. 



Modern methods of canning make it possible to preserve 

 perishable vegetables and fruits. In cans, they can be 

 transported as needed and will not spoil if they are kept 

 at medium temperatures. 



