PREPARATION OF TISSUE-FUEL 193 



They may accompany disease of the brain, especially of the 

 cerebellum, the chief centre of the balancing mechanism 

 of the body. Hence, too, disturbances of balance, such 

 as result from the movements of ships or of swings, give 

 rise to vomiting. But why the balancing mechanism 

 should be so closely linked up with the stomach is a matter 

 which has never yet been satisfactorily explained. 



13 



