THE VITAMIXES IN THE ANIMAL KINGDOM 



107 



Changes in the gastro-intestinal tract. McCarrison's (299) investiga- 

 tion on 153 pigeons yielded some very interesting results. The 

 upper part of the intestine, which is muscular in nature in the region 

 of the pancreas, is mostly involved. Atrophy had proceeded to 

 such an extent that the walls were almost transparent, especially 

 when white rice was fed for a long time. .The intestine showed a 



FIG. 19. THE UITER PART OF THE INTESTINE OF A HEALTHY PIGEONT 



(McCARRISON) 



definite congestion; ecchymosis was not infrequently seen and 

 microscopic hemorrhages were almost always observed. Under the 

 microscope, the congestion led to a partial disappearance of the 

 epithelium. The myenteron was so severely atrophied, that its 

 motor functions suffered. Further, there was described degeneration 

 of the mesenteric plexus of Auerbach, which impaired the functions. 



