VITAMINES AND THEIR USES 107 



Vitamines and their uses. Recent studies have shown 

 that some foods possess peculiar substances known as wtam- 

 ines which are essential to health. For example, one of 



These rats are the same age. They were always fed the same kinds and amounts 

 of food, namely, bread 60%, potatoes 20%, greens 20%, but the one at the left 

 had in addition a tablespoonful of milk daily. (Photo from Battle Creek Sani- 

 tarium.) 



the German raiders was forced to put in at Newport News 

 and have its crew interned because of severe illness among 

 them. They seemingly had all the food necessary, for they 

 had sunk ship after ship and had taken canned goods, 

 wheat flour, and other materials in abundance. The officers 

 had fresh vegetables from time to time while the crew had 

 none, and after a period of nearly three hundred days, a 

 large number of the crew became so ill that medical at- 

 tention was necessary. When these men were given a diet 

 of fresh fruit, milk, eggs, and soups made of boiled skins of 

 vegetables, they were cured in a very short tune. This 

 seems to show that they needed the vitamines which were 

 present in skins of certain vegetables. The chief sources 

 of vitamines for us are the outer coats of rice (unpolished or 

 brown rice), potatoes, carrots, and some other vegetables; 

 eggs, milk, and many fresh fruits, particularly oranges and 

 pineapples. 



