Vi') 



%** 



^ ^"^^ 



"Vo^ 



If?^: 



A A -^ 



8 



Fig. 25. 



2 month old culture of cartilage cells after 48 hours incubation. Stained 



with azure blue, x 60. 



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



