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Scientific Proceedings (129) 



are especially suitable for the diet of convalescents. Thus orange 

 gelatine was more easily handled by the stomach than the com- 

 monly used orange albumin. The preparations containing milk 

 and eggs serve as vehicles and make it possible to increase in 

 the diet the amount of these foods for which some persons 

 (especially children) may have a distaste. 



In ten individuals showing hypo- or hyper-acidity, gelatine 

 was also readily digested. It should prove of value in stomach 

 disorders because of the slight burden it places on the digestive 

 functions, its acid-combining power, and low degree of acid 

 stimulation. 



Gelatine preparations made from fresh orange, lemon and 

 strawberry juice with the degree of heating commonly employed 

 in the household showed essentially the pronounced antiscorbutic 

 action of the fresh juices themselves. Scurvy in guinea pigs 

 was readily overcome by small amounts of such preparations. 



A study was made of the indican and phenol elimination of 

 a normal man on a diet, the protein portion of which was sup- 

 plied by gelatine. Knox gelatine was used in this as in the other 

 tests, 72 grams per day being given for five days. In another 

 period a meat diet was given. The indican output fell from 

 8.25 mg. on the last day of the meat period to 0.70 mg. on the 

 last day of the gelatine period. Total phenols fell from 506 

 to 193 mg. The period averages were 474 and 331 mg. respec- 

 tively. The decreases in indican and phenols were probably 

 due to the low content of gelatine in tryptophane and tyrosine. 



129 (2089) 



The cultivation of the organisms of rocky mountain spotted fever 

 and typhus in tissue cultures. 



By S. B. WOLBACH, HENRY PINKERTON, and 

 MONROE J. SCHLESINGER.* 



[From the Departments of Pathology and Bacteriology, Harvard 

 Medical School, Boston, Massachusetts.] 



In these experiments tissues from infected adult guinea pigs 

 were grown in plasma obtained from normal guinea pigs. With 



* This paper was read at the meeting of the society held on January 17, 

 1923. 



