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juice. They were removed before the action of the fluid on the 

 albumen tubes, because it was observed that the conversion of albumen 

 by trypsin was greatly retarded by the presence of the agar-agar. 



To determine the quantity of erepsin, drawn into the agar, we made 

 the clear extract act upon the peptone. 



We here append the results of some experiments carried out in 

 accordance with the method described above. More explicit state- 

 ments will be published elsewhere. Some further particulars concerning 

 the method of investigation are mentioned below. 



III. Some Experiments. 



1. Distribution of pepsin (inch pepsinogen) over the 

 gastric mucous membrane. 



A pig's stomach was cut into two symmetrical halves along the 

 great and small curvature and washed with NaCl 0.9 %• Then both 

 halves were spread out flat and on the spots marked below A , B, C, 

 etc. columns of neutral agar-agar of 2 °/ were placed. 



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