OF EMBRYONIC DIFFERENTIATION 277 



plished, amongst other proper large bowel agencies, by 

 admixture with the appendicial secretion, loaded with the 

 bacillus coli communis, which latter, in our opinion, 

 exercises an actually, living, and specific, influence, on the 

 passing residuum, breaking it up into impalpable pabulum, 

 so to speak, in which state, it finds the requisite passage, 

 through the large bowel wall into the proper receiving 

 vasculature, leaving the irreducible remainder, to find its 

 way to the sigmoid flexure of the descending colon, for 

 faecimetric transmission into the rectum, to be finally 

 " searched " for still remaining nutritive elements, and 

 made into parcels for convenient disposal, as altogether 

 unutilisable. These stages, and factors, may be said, to 

 constitute a short syllabus of the long process of diges- 

 tion, or a bird's-eye view of the first, or alimentary 

 circulation. 



