METHODS OF FORMINf ! STOMACH POUCH. 13 



here illustrations of the operation borrowed from the work of 

 Dr. Chigin (Figs. 1 and L>). 



Naturally our addition to the operation of Heidenhain makes it 

 more difficult, but as will be apparent farther on, we are compensated 

 as a reward of this increased difficulty by an intact condition of the 

 nervous relations of the stomach, which was our aim. It is clear that 

 the fibres of the vagus nerve reach the separated portion of the stomach, 

 since they course between the serous and muscular layers of the flap. 



Fifj. 2. r. Cavity of stomach. 5'. Pawlow's pouch. 

 A. A. Abdominal wall. 



The operation is not followed by any serious discomfort, nor does it 

 endanger the life of the animal. 



We have yet to discuss the question whether the activity of our 

 miniature stomach furnishes a true representation of the secretory work 

 of the large stomach. This is all the more necessary since the food 

 comes into contact with the walls of the latter during digestion, while 



O O 7 



the former remains empty. A full answer to this question I shall 

 reserve for a later lecture, when we are in possession of more material. 

 At present I shall merely state in a few words that, in addition 

 to rigorous inferences drawn from a series of unquestionable facts, 

 there are numerous direct experiments in which the small and large 

 stomachs were compared both as regards conditions of work and 



