PROTECTING PLANTS 



185 



ammonia), and also a good hand syringe (Fig. 218), a 

 knapsack pump (Figs. 219, 220), a bucket pump (Figs. 

 221, 222), a hand bellows or powder gun, perhaps a 

 barrow outfit (Figs. 223, 224, 225), and if the planta- 

 tion is large enough, some kind of a force pump (Figs. 

 226, 227, 228). If one is always ready, there is little 



226. A barrel hand pump. 



227. A barrel outfit, showing nozzles oa 

 extension rods for trees. 



