XXVI 



Illustrations 



58. Potato Diseases 



59. Diseases of the Potato 



60. Pox or Pit of the White Potato, Showing 



Different Stages of Infection 



61. Potato Diseases 



62. Potato Diseases 



63. Potato Diseases 



64. Tomato Diseases 



65. Tomato Diseases 



66. Tomato Diseases 



67. Tomato Diseases 



68. Sleeping Sickness of Tomato 



69. Celery Diseases 



70. Celery Diseases 



71. Spray Machinery . 



72. Parasitized Insects. Treatment of Fence 



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