Explanation of Plates 1 and 1 



Plate 1 is a record of the trees which became diseased each year in orchards 

 1 and 2. Orchard 1, set in the spring of 1907, consists of rows 1 to 27 at the 

 left of the center road. Orchard 2. set in 1908, consists of rows 1 to 28 at 

 the right of the center road and of rows A to F adjoining orchard 1. Those 

 Mocks of trees inclosed in squares and rectangles were Elbertas, the remainder 

 ci nsisted of various varieties. 



Plate 2 is a record of the trees which became diseased in orchard 3, which 

 was set in 1912. Three trees each of thirty-one different varieties were located 

 in rows 1 to 31 at spaces 6, 7 and 8. 



A circle represents an original tree that apparently remained healthy ; a 

 triangle, an original tree removed because of little peach; a square, an original 

 tree removed because of yellows ; a square with a large triangle, an original 

 tree removed because of both yellows and little peach. A triangle or square of 

 one color indicates that the replant remained healthy, while a double triangle, 

 small triangle within a square or double rectangle indicates that the replant 

 became diseased. Every one of the second replants or the third tree to be 

 set in some spaces remained healthy. 



The colors for the years 1909 to 1914 are light, while the colors for the years 

 1915 to 1920, in which the heavier losses occurred, are of darker shades. 



