11^ 



^< 



^^ 





4 



'*^^' 



Fig. 22. 



1) Cartilage after 48 iiours incubation in plasma medium. The amorphous substances 

 are broken up. The cartilage cells contain relatively little cytoplasm and the nucleus 

 and cytoplasm are stained very deeply. Stained with azure blue. 



2) Types of isolated cells of cartilage from 2 day old cultures. 



3) Types of cartilage cells after escape from the amorphous substances. 



4) Types of cartilage cells cultivated on the surfac^e of the medium. 



5) Cell types of cartilage found in cultures of fresh cartilage after 48 hours incubation. 

 Nuclei deeply stained, with the granular chromatin arranged in the periphery. The 

 cytoplasm is unstained and clear as glass. 



6) Cartilage cells growing on the surface of the medium. 



From The Journ. of Exp. Med. 1922, XXXVI, 379. 



