MISCELLANEOUS: STIMULI UNDERLYING TUMOR-FORMATION 527 



FIG. 396. From the same series as Fig. 395. A pared, sterile block of Early 

 Rose potato showing development of small tumors from the cut surface. Most are 

 broad based but A' was narrowly pedicelled. Those at the top and the lower 

 left are from the region of the cambium; A* and Y are from deeper tissues. 

 Photographed June 14, 1919. X 5. 



