199 



with Ringers solution. They were not transferred to the 

 fluid medium l)efore the e])ilhelium had grown all around 

 the fragment. After a monlhs eullivalion in a fluid me(huiu. 

 the intestinal organisms were fixed in 2".) formol-R i u g e r 

 solution and seetioned. There was a marked difference between 





Fig. 44. 

 Experiment 2107—24. Section of an intestinal „Organism" cultivated in 

 embryonic juice without plasma. The epithelium is normal. The stroma is 

 very loose and the cells are sparsely represented. A cystic formation is 



seen at A. x 150. 

 From The Journ. of Exp. Med., 1922, XXXVI, 393. 



those cultivated in the fluid medium and those in the solid 

 medium. Those in the fluid medium had well preserved villi 

 and verv little stroma left. In the centre of the "organisim" 



