ILLUSTRATIONS. 



PLATES. 



Page. 

 Platk I. Wild rice growing in water after being kept wet in cold storage at a 

 temperature of 32-34° F , from October 19, 1903, to November 15, 



1904 14 



II. Stages of germination of wild rice, showing the development of the 

 root system and the relative position of the seedling and the parent 

 seed !■* 



III. Fig. 1.— Apple crown-gall on grafted tree. Fig. 2.— Apple crown- 



gall on transplanted seedling. Fig. 3.— Hairy-root disease on 

 grafted apple tree. Fig. 4.— Hairy-root disease on grafted apple 

 tree 1^ 



IV. Fig. 1.— Apple seedlings diseased with hairy-root. Fig. 2.— Apple 



seedlings diseased with soft crown-gall 16 



V. Fig. 1.— Healthy fibrous rooted apple tree, pot grown. Fig. 2.— 



Apple seedlings diseased with hairy-root 16 



TEXT FIGURES. 



Fig. 1. Peppermint "runners," showing method of propagation 20 



2. Leaves and flowering top of peppermint 20 



3. Peppermint still (after Dewey, in Bailey's Cyclopedia of American 



Horticulture) 26 



4 



