MISCELLANEOUS: STIMULI UNDERLYING TUMOR-FORMATION 521 



-V v.' 





' "- 







-sS. '-. , * 



| .L'^ 



. '^.M'. ;- 



FIG 391. Section of the outgrowth A" on cut flesh of Fig. 39(M, showing 

 distorted vascular structure of the tumor. At left, below, a few normal cells. 

 At left, above, some cells of the newly formed cork layer. 



