120 



GENERAL SCIENCE 



piece of cloth; then wet it thoroughly with water and 

 squeeze or work it between the fingers for several minutes, 

 dipping it often in water to keep it moist. The substance 

 left in the cloth after such a process is gluten. 'Gluten, 

 being a tough, gummy substance, and somewhat elastic, 



POTATO 



CHEESE (FULL CREAM) 



EGG 



WHITE BREAD 



RELATIVE PROPORTIONS or DIFFERENT NUTRIENTS IN 

 WELL-KNOWN FOODS 



prevents the escape of carbon dioxide from the dough 

 when bread is permitted to rise. 



Just enough protein should be eaten for the growth 

 of the bodily parts and to rebuild partially worn out 

 cells. The amount needed will depend upon the age of 

 the person and the kind of work that he is doing. A 

 person working in an office or in school does not require 

 as much protein as a person who is engaged in hard 

 physical labor like shoveling coal or working on the rail- 

 road. Men who are engaged in hard physical work can 

 live well on such foods as meat and beans, because lean 

 meat and beans have a large quantity of protein. Protein 



