PLATE 5 



EXPLANATION OF FIGURES 



8 Section through a mixed tumor (Ehrlich sarcoma) — adult spleen graft after 

 four days of conjoint growth. Only a very small tumor focus is found. Prac- 

 tically all the tumor cells, except for a few of them {H. Tc), are in vacuoles, sur- 

 rounded by mesenchymal capsules. 



9 Large magnification, 1000 diams. of a small area of figure 8. Tc', tumor 

 cell in mitoses. A, B, C, D, show different stages of gradual digestion of tumor 

 cells. 



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