VEGETABLE GARDENING. 



37 



special apparatus is needed, and there are many kinds offered 

 by manufacturers. In figure 14 is shown the barrel spray 

 pump, which has been found most convenient at the Minnesota 

 Experiment Station for general work about the grounds, such 

 as spraying trees of different kinds where the knapsack 

 sprayer is insufficient. The barrel is fasteued to a wooden 



Figure 14.— Barrel spray pump, showing cone shaped strainer to the left, 

 frame and may be placed in a wagon or on a stone boat when 

 it is to be used. 



The essential parts are a good hardwood barrel, such as 

 a linseed oil barrel, mounted on and securely fastened to a 

 light framework of oak. On the barrel and at one end is 

 mounted a powerful force pump, with attachments, capable of 

 throwing two or three fine, strong sprays at one time. The 

 liquid in the barrel is kept agitated by a small stream of 

 water passing through a one-fourth inch pipe, having a one-six- 

 teenth inch wide opening near the feed pipe of the pump, in the 



