HOW TO DESTROY INSECTS. 38 



in the first instance on a portion only, adding the re- 

 mainder cold some time afterwards. 



A safe rule for plants of every kind is to allow half a 

 fftdlon of water to every ounce of tobacco. 



The tobacco may be infused a second time and the 

 liquid added to the first ; the second infusion should be 

 not more than a quart of water to every ounce of to- 

 bacco. Plants with leathery leaves will bear stronger 

 doses than plants with thin, papery leaves, and the 

 best time to use the liquid is in the afternoon or evening. 



Small plants are best cleansed by dipping them. 



Have ready a vessel large enough for the purpose 

 filled with tobacco-water. Take hold of the pot with 

 one hand, and place the fingers of the other over the 

 soil in just the same manner as if about to turn the 

 plant out of the pot. In this way dip the plant head 

 downwards into the liquid, and hold it there a few 

 seconds. 



If there are many to be operated on, it would be well 

 to have the liquid in a trough and some pieces of wood 

 laid across ; on the pieces of wood the edges of the pots 

 could rest, and, beginning at one end, the plants could 

 be turned over with their heads in the liquid, and re- 

 main so till the trough is filled, which, of course, would 

 occupy but a brief space of time. 



When taken out of the bath the plants should be 

 laid on their side to drain, and then be well syringed 

 with pure, soft water, 



