PLATE 23 
Plant 5 of Ricinus communis, branch A, showing effect of 1 to 1,200 ammonia water. 
These are sections of the fourth ( X ), third, second, and first intemodes of the uppermost 
untreated branch. 
All show white nodular proliferations, and Y also shows strands; none were injected; 
and none show pith injury (dark specking). This branch was very young or not yet 
developed at the time of the inoculation, but it grew out of that node of the main 
axis which formed the ceiling of the uppermost injected intemode (see PI. 27, fig. 3), 
Somewhat below the surface, in the shadow, on the right side of the pith wall of X f 
are also half a dozen small tumors. Plant injected August 15, 1916. Photographed 
on September n. X3. 
