Fig. 15. — Human connective tissue cells fixed and stained with Giemsa stain. The culture was 

 made by extirpating the central portion of culture 285 in its 16th passage, washing the remaining 

 portion of the culture with Ringer solution without removing it from the cover-glass, and drop- 

 ping on fresh plasm and extract. The preparation shows the extent of growth obtained in 48 hours 

 from peripheral cells remaining after extirpation of the fragment. (After Losee and Ebeling.) 



