Diseases of the Potato. 331 



into a spray after leaving the discharge pipes. This may be done 

 by means of air blasts or by revolving brushes. 



21. Pumps for driving the liquids through nozzles are on the 

 whole most satisfactory. They can be arranged so that several rows 

 may be sprayed at once. 



22. Horse-power sprayers can be recommended for spraying 

 potatoes.j pf the plants are sprayed for the potato beetle, one 

 nozzle over each row is sufficient ; for ilea-beetles and for fungus 

 diseases it is better to liave two nozzles for each row, that a more 

 thorough application may be made. 



23. Powder guns are very satisfactory when insecticides are to 

 be applied to potatoes, although wind and dry foHage may lessen 

 the value of the treatment. 



24. Fungicides should usually be applied in liquid form, using 

 machinery which will treat the vines thoroughly as fast as a man or 

 a horse can walk. 



E. G. LODEMAN. 



