MISCELLANEOUS: TUMORS IN ABSENCE OF PARASITES 509 



B 



FIG. 384. Cross-section of intumescences on tomato produced, it is said, 

 by forcing water into the stems: A. Variety No. 18. Normal tissue at the right. 

 B. Variety Lorillard. Normal tissue at the right. (After George F. Atkinson.) 



