PLATE 57 
1. —Cauliflower intumescences due to vapor of mixed ethyl alcohol and acetic acid 
(Camoy’s fixative). Free-hand unstained section (water mount) from the leaf shown 
on Plate 56. The growths are unlike many of those due to vapor of ammonia— 
that is, they are all hyperplasias. The tumor tissue is much more compact than 
the loose parenchyma from which it has originated, is free from chlorophyll, and is 
not endowed with continuous growth, X 75* 
2. —This is an enlargement of the right-hand tumor shown in figure 1. The darker 
parts, at least in the normal portion, represent chlorophyll-bearing tissue. Ex¬ 
posed on September 21, 1916. Photographed on September 28. X 160. 
