32 



NON-NUTRITIOUS PRINCIPLES. 



In addition to the flesh-forming constituents 

 of food, there are also needed others known as 

 non-nitrogenous, non-azotised, or non-nutritious, so 

 named in contradistinction to those which contain 

 nitrogen. Examples are found in starch, sugar, 

 gum, and fat itself. They are composed of car- 

 bon, hydrogen, and oxygen, minus nitrogen, and 

 are found abundantly in the different varieties of 

 ?orn and vegetables used as food. 



Their services are required in the system 

 equally with the albuminous compounds, but for 

 a different purpose, viz., the production of animal 

 heat, and formation and storing up of fat within 

 the system. 



ANIMAL HEAT. 



In order to render somewhat intelligible the 

 principles upon which heat is developed, and 

 maintained in the body, and the part which food 

 plays in that process, attention must again be 

 directed to facts. 



Here it must be understood that although the 

 term " heat producer " is applied to the saccharine 

 principles of food, it by no means establishes an 

 isolated fact. They are not the sole agents in 

 the production of animal heat. I will attempt 

 to explain. 



