48 POISONOUS PKOTEINS 



milk the food supply for the young is supplied 

 in similar form. The carbohydrate exists in 

 the form of milk sugar. The fat exists as such. 

 The protein, in the form of casein, supplies the 

 amino acids and the mineral substances are 

 found mostly in the ash. The ferments are fur- 

 nished by the digestive organs of the young. Di- 

 gestion is relatively simple and easy, absorption 

 proceeds quickly and growth follows. 



Bacteria, although unicellular and simple 

 morphologically, are made up chemically of 

 highly complex molecules. There may be uni- 

 cellular organisms composed of simple proteins 

 but this certainly is not true of the bacteria 

 which I have studied. In their chemical com- 

 position and structure these bacteria are quite 

 as complex as the most highly developed cells 

 in the animal body. It follows, therefore, that 

 when we speak of bacteria as low and primitive 

 forms of life, we should bear in mind that we 

 are speaking as morphologists and not as chem- 

 ists. Many, probably all, of the soluble proteins 

 in man's body are chemically of much simpler 

 structure than are those of the bacterial cell. 



The Proteoses. 



Schmidt-Mulheim in trying to discover the 

 fate of peptone in the blood (it being assumed 



