Memoif 73 



Plate I 



Row A 



Trees 1 to 4, 



and 10. 7, 



8,9 



Row A 

 Trees 11 to 18 



Row B 

 Trees 1, 2, 

 and 5 to 10 



RowC 



Trees 1 to 4 

 and 7 to 10 



Row C 

 Trees 11 to 18 



Row D 

 Trees 1 to 10 



Row F 



Trees 1 to .: 



and 8 to 10 



Row G 



Trees 18 to 13, 



10, and 9 



ROCTS OF THE PEACH TREES AFFECTED WITH CROWN-GALL WHICH WERE USED IN THE 



EXPERIMENT 



The behavior of these trees in the field is shown in table 2. In each case read from left to ri^ht except 

 in the row at the top, where tree 7 is tree 10 of the reeords and trees 8. 9, and 10 are 7, 8, and 'J of the records; 

 and in the row at the bottom, where it is necessary to read from right to left. (Special acknowledgment 

 is made to Mr. \V. It. Fisher for his technics] skill in obtaining suitable prints from most unsatisfactory 

 negatives) 



