OR PINE-APPLE. 171 



lurking amongft the bottoms of the leaves, 

 they are fure to be killed as foon as the 

 powder touches them, which is eafy to 

 accomplifh, as there is no fhelter for 

 them ; but in pots of infected plants the.y 

 have many recefles, and may fecrete them- 

 felves fo that none of the powder can 

 touch them. 



THE powder is fo ftrong a poifon for 

 that infect, that it foon kills it ; and I am 

 of opinion that in two years the mofl in- 

 fected houfe might be cleaned by fifting 

 the tan once, and ufing the powder at 

 every mifting, and putting fome between 

 the leaves ; but this is only conjecture. 

 Although I tried it in the fpring moving, 

 and found them greatly dimini&ed, I had 

 not patience to go through the experi- 

 ment, as I had got one houfe clear by the 

 firft-mentioned operation. 



IF any perfon choofes to try the re- 

 medy in this manner, there fhoulcl be 

 r.he fame quantity of the mixture in the 

 q mould 



