96 NITROGENISED AND NON-NITROGENISED 



Out of those substances which are adapted to the 

 formation of blood are formed all the organised 

 tissues. The other class of substances, in the normal 

 state of health, serve to support the process of res- 

 piration. The former may be called the plastic ele- 

 ments of nutrition ; the latter, elements of respiration. 



Among the former we reckon — 



Vegetable fibrine. 

 Vegetable albumen. 

 Vegetable caseine. 

 Animal flesh. 

 Animal blood. 



Among the elements of respiration in our food, 



are — 



Fat. Pectine. 



Starch. Bassorine. 



Gum. Wine. 



Cane Sugar. Beer. 



Grape Sugar. Spirits. 

 Sugar of milk. 



XX. The most recent and exact researches have 

 established as a universal fact, to which nothing yet 

 known is opposed, that the nitrogenised constituents 

 of vegetable food have a composition identical with 

 that of the constituents of the blood- 



No nitrogenised compound, the composition of 

 which differs from that of fibrine, albumen, and 

 caseine, is capable of supporting the vital process in 

 animals. 



The animal organism unquestionably possesses the 



