I9I2] 



Grover Tracy and William J. Gies 



471 



TABLE 4. 



5. Conditions of the fifth experiment: Same as those of No. 

 I, except that a different preparation of fibrin was used. See 

 Table 5. 



TABLE S. 



SECOND SERIES OF EXPERIMENTS. WITH ELASTIN 



Group A. Trypsin in 2.5 or 5 per cent. ammonium hydroxid 



Solution 



6. Conditions of the sixth experiment: Same as those of Nos. 

 1-5 (first series), except that finely divided elastin (3 grams) from 

 Ligamentum nuchcB (oxen) was substituted for fibrin, 5 per cent. 

 ammonium hydroxid Solution for o.i per cent. hydrochloric acid 

 Solution, and commercial trypsin for ordinary pepsin. Further, 

 the dry trypsin was added to the dry elastin in each bottle and the 



** Slight digestion. 



