400 



THE MICROSCOPE. 



its granular contents in the stem. One of the most remarkable of this 

 tribe has been committing great devastation among our grape crops 



fig. 187. Fungoid disease. 



1. A section of the Tomata, showing the sporangiae growing from the spawn or root 

 (mycelium). 2 shows a budding from the upper part of a branch. 3. Vertical and 

 lateral view of sporangiae, with their granular contents turned ,out. 6, 7, and 8 

 show different stages of growth of Mycoderma cervisia. 9. Torula diabetica. 



during the past two years. A section of the grape, magnified 75 

 diameters, is seen in fig. 188 j the fungi or mildew is growing from a 

 section of the skin of the grape. 



" Grapes," says Mr. Harris, " when blighted, are covered with 

 what appears to be a white powder, like lime, a little darkened with 

 brown or yellow. These fungi send forth laterally, in all directions, 

 thread-like filaments, which become so completely interwoven with 

 one another as entirely to cover and enclose the skin of the grape in a 

 compact and firm network, and on each is seen the egg-shaped capsule 

 or seed-pod." 



