GASTRIC ANALYSIS 



contents of man. Later experiments 1 have, however, demonstrated 

 that the acid concentration of the freshly secreted gastric juice of man 

 is similar to that of the dog, i.e., 0.4-0.5 per cent. Boldyreff claims 

 that this initial high acidity of the human gastric juice is normally 

 lowered to the "optimum acidity' 7 of 0.15-0.2 per cent hydrochloric 

 acid by regurgitation of alkaline fluids (bile, pancreatic and intestinal 

 juices) from the intestine. This claim has been substantiated by 

 experiments made in the author's laboratory 2 and elsewhere. 3 Both 

 bile and trypsin are easily identified in the stomach contents of man 

 after the introduction of 0.5 per cent hydrochloric acid into the empty 

 organ. The above points are illustrated by the chart shown in Fig. 

 43, page 150. 4 



The composition of human gastric juice and of the residuum (see 

 page 1 60) is given in the following table: 



COMPOSITION OF HUMAN GASTRIC JUICE. 



1 Babkin: Die Aussere Sekretion der Verdauungsdrusen, Berlin, 1914. 

 Boldyreff: Transactions of nth Congress of Physicians, St. Petersburg, 1909. 

 Boldyreff: Quart. Jour. Exp. Med., 8, i, 1914. 



Carlson: Am. Jour. Physiol., 38, 248, 1915. 



Bergeim, Rehfuss & Hawk: Jour. Biol. Chem., 19, 345, 1914. 



2 Spencer, Meyer, Rehfuss and Hawk: Am. Jour. Physiol. , 39, 459, 1916. 

 8 Migai: Diss., St. Petersburg, 1909. 



Milosorov: Zent. Physiol., 28, 615, 1914. 



Zaitzeff: Russky Vrach., 14, No. 29, 1915. 

 4 Spencer et al: Loc. cit. 

 6 Carlson: Loc. cit. 



6 Fowler, Rehfuss and Hawk: Loc. cit. 



7 Fowler & Buchanan: Unpublished. 



