PLATE 5 
Photomicrographs of the crowngall bacteria in the tissue 
A. —Six-day-old gall. The bacteria are seen in the intercellular space marked a, 
from^which they extend a short distance into the middle lamellae. Paraffin section 
stained with dilute carbol-fuchsin and light green. X555. 
B. —As A, except from a io-day-old gall. Xoi7- 
C. —As A, except from a 14-day-old gall. The bacteria have acted on the wall 
so as to produce a thickening and a change in standing reaction. X835. 
D. —As A, except from a 14-day-old gall. X917. 
