PLATE 2i 
1. —Roof of second unopened intemode below lowest injected one on main axis of 
plant i of Ricinus communis , which was injected with i to 100 ammonia water on August 
15. This node gave rise to a branch the lowest intemode of which had been injected. 
At the extreme top is shown the floor of the first unopened intemode below the lowest 
injected one on the main axis, and here there are no proliferations, but there was a 
growth on the ceiling above this floor. Photographed on October 3, 1916. X$- 
2. —Free-hand unstained section of tumor shown in figure 1. The section is too 
thick; it remained overnight in water, and it is not sufficiently magnified. The 
right-hand part is normal tissue. Planar f. 35 mm., bellows 55. 
67908°—17 - 5 
