22 



It has been analysed to show the following approxi- 

 mate constitution: 



a. Volatile fats, trace 



b. Oleic acid 



c. Capric acid 



d. Stearic acid 



CONCLUSIONS. 



The specific antigens of the Bacillus coli are 

 chemical entities bound up in the fats of the organism. 



The proteins of the organism are not concerned in 

 the specificity of the antigens. 



The fats of the antigens consist of volatile, 

 saturated and unsaturated acids. 



