128 



EXPLANATION OF PLATES. 



PLATE VI. 



Fig. 



26a. Section through brown patch of Calville Blanche Ete, showing two 



vascular bundles in lower half . . . . . . . . x 50 



26b. Portion of same section, showing diseased cells collapsed and leaving 



large spaces . . . . . . . . . . . . x 50 



27. Section through brown patch of Eed Astrachan Apple with adjoining 



healthy tissue . . . . . . . . . . . . x 25 



28. Section from same patch, mounted at once in glycerine and water and 



photographed, showing the cells collapsed and large cavities scattered 

 through the section . . . . . . . . • • . . x 170 



29. Section from same patch in sequence, placed in water for forty hours and 



then photographed. The collapsed cells have absorbed moisture and 

 become distended . • ■ •■ x ^® 



