OIDIUM OR POWDERY MILDEW OF THE VINE. 



Fig. 9. Various forms of Hand Sulfur Distributers. 



, Upper left hand, European machine. &, Upper right hand, sulfur bellows, c 

 and d, Lower figures, American machines. 



nearly all extremely cumbersome and wasteful of sulfur. The best of 

 those tested is shown by the photograph of fig. 9, d. They all have 

 several very serious defects for the purpose tested. The regulation of 

 the flow of sulfur is very imperfect and it is necessary to use an unnec- 



