88 Nebraska Agricultural Exp. Station, Research Bui. 10 
Fig. 18 — A good type of barrel pump 
Table 57 A shows the average cost of spraying with a barrel 
pump similar to fig. 18. An outfit of this kind is efficient for an 
orchard of 300 trees or less, considering 20 to 24-year-old trees as 
Fig. 19 A hand pump affording greater pressure than the pump shown 
in Figure 18 
Table 57 B shows the average cost of spraying with the larger 
capacity hand pumps similar to fig. 19. A machine of this capac- 
ity is efficient for an orchard of 300 to 400 trees. 
