DIGESTION IN THE STOMACH 



735 



the diagram (Fig. 348). In a dog treated in this way it is found that the 

 amount of juice secreted by the small stomach bears always the same ratio 

 to the amount secreted by the large stomach, while the digestive power of the 

 juice obtained from the small stomach is equal to that obtained from the 



large. 



This is shown in the following Table : 



SECRETION FROM GASTRIC FISTULA AFTER SHAM MEAL 





FIG. 348. Diagram to show Pawlow's method of making a cul-de-sac of the 

 cardiac end of the stomach, with "vascular and nerve supply intact. 



In A the line of the incision into the gastric wall is shown. B represents 

 the operation as completed. 



In A: O, ossophagus; R.v, L.v, right and left vagus nerves; P, pylorus; 

 C, cardiac portion of stomach; A, B, line of incision. 



In B : V, main portion of stomach ; 8, cardiac cul-de-sac ; A, abdominal 

 wall; e, e, mucous membrane reflected to form diaphragm between the two 

 cavities. 



In this case a fistulous opening had been established into the large 

 stomach, so that the juice could be obtained simultaneously from both 

 sections of this organ. Secretion was excited by a sham meal, in which the 

 food taken by the animal was not allowed to reach the stomach, but dropped 

 out of an opening in the neck. It will be seen that the secretions in the two 

 sections of the stomach run parallel to one another, while there is an almost 



M. 







1 Pawlow, The Work of the Digestive Glands (translated by Sir W. H. Thompson, 

 D.), p. 80. 



2 The strength of the juice was determined by measuring the number of millimetres 

 coagulated egg-white (in Mett's tubes) which were digested in eight hours. 



