40 



VEGETABLE GARDENING. 



pump is most desirable where the work to be done is not very 

 extensive, ior applying these subtances on a large scale some 

 special apparatus is needed, and there are many kinds offered 

 by manufacturers. In Fig. 15 is shown the barrel spray pump, 

 which has been found most convenient at the Minnesota Experi- 

 ment Station for general work about the grounds, such as 

 spraying trees of different kinds where the knapsack sprayer is 



Figure 15.— Barrel spray pump, showing cone shaped strainer to the left. 



insufficient. The barrel is fastened to a wooden frame and 

 may be placed m 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. At one end of the barrel is mounted a 

 powerful force pump with attachments capable of throwing two 



