Mildew of the Grafe Vine. 



of the mildew, and the result has demonstrated that the two fungi are 

 diBerent. This year I have repeated the investigation with the same 

 result, and the drawings of the magnified fungus, made in successive 

 seasons, show precisely the same characteristics. 



Figure I shows the appearance of the fungus at an early stage of 

 its development. 



Fig. I. 



Figure 2 represents its appearance when further advanced ; the last 

 showing all the spores in a full stage of development. 



Fig. 2. 



To indicate the correctness of my conclusions, I add in Figure 3 

 copies of the microscopic presentation of the didium as found on page 

 216 of Mr. Flagg's European vineyards. 



I found on the leaves of a garden flower last season a heavy white 

 fungus growth, so thick, indeed, as to wholly obscure the color of the 

 leaf This, when placed under the microscope, resolved itself into 

 oviform fungi, precisely like the drawings of the didium which are 

 reproduced above. 



