The Ammonia of the Gastric Juice. 



13 



9 (1073) 



Gastro-intestinal studies XI. Studies on the relative digesti- 

 bility and utilization by the human body of lard and 

 hydrogenated vegetable oil. 



By C. A. Smith, Raymond J. Miller and Philip B. Hawk. 



[From the Department of Physiological Chemistry, Jefferson Medical 



College, Phila.] 



Two normal men were the subjects of the experiment, which 

 was conducted in two periods of eight days each, separated by 

 an interval of three days. The diets were so arranged that the 

 fat, ingested during the first period, was mostly lard, while that 

 of the second period was mostly hydrogenated vegetable oil. 

 The daily feces were analyzed for total fat, fatty acid, and neutral 

 fat by the Saxon method. The average percentage*^ digestion 

 of lard was 96.75, and of the hydrogenated vegetable oil, 96.3, 

 while the average utilization percentages were 94.7 and 93.35 

 respectively. It is thus apparent that the hydrogenated vegetable 

 oil used in this experiment was as satisfactorily digested and 

 utilized by normal men as was lard. 



10 (1074) 



The ammonia of the gastric juice. (Preh'minary communication.) 



By Harry L. Huber. (by invitation). 

 [From the Hull Biological Laboratories of the University of Chicago.] 



Recently Carlson 1 reported some observations on the occur- 

 rence of NH 3 in the gastric juice of man and of dogs. Further 

 observations have been made and a few of the results are given 

 below. 



Three series of experiments were conducted : (a) On dogs with 

 Pawlow stomachs; (b) on normal human individuals, and (c) on 

 human individuals with gastric disturbances. 



The NH 3 -content of the gastric juice of normal dogs varied 



1 Carlson, Am. Journal of Physiology, 1915, XXXVIII, p. 248. 



