Fig. 4.— Crown Gall. 1, gall on Mariana Plum cutting; 2. gall 

 at crown and on root of Elberta Peach; 3, gall on Peach induced 

 by planting diseased Mariana Plum in juxtaposition; 4, gall in- 

 duced by innocuiation. (Quintance, Report Georgia State Histori- 

 cal Society, 1900.) 



