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the bufinefs of induftry to prevent future generations 

 of thefe ravagers, by deftroying the eggs previous 

 to their hatching; and this is beft: accomplilhed by 

 frequent fcreening and expofure to draughts of 

 wind or frefli air. By frequently ftirring the grain, 

 the cohefion of their ova is broken, and the nidus 

 of tbofe minute worms is deftroyed, which on^ 

 hatching colled together, and fpin or weave nu- 

 merous nefts of a cobweb-like fubft^nce for thcijr 

 fecurity. To thefe nefts they attach, by an infi- 

 nity of fmall threads, many grains of corn together, 

 jfirfl for their prote<5tion, and then for their food. 

 When their habitations ^re broken and feparated 

 by the fcreen, they fall through its fmall interfticqs, 

 and may be eafily removed from the granary with 

 the dufl^' Thofe that efcape an early fcreening will' 

 be deftroyed by fubfequent ones, while the grain 

 i^ but little injured; and the corn will acquire 

 thereby a fuperior purity. But by inattention to 

 this, and fometimes by receiving grain already 

 infeded into the granary, thefe vermin, particu- 

 larly the weevils, will in a (hort timb fpread them- 

 felves in that ftate every where on its furface, and 

 darken even the walls by their number. Under 

 fuch circumftances a hen or hens, with new-hatche4 

 chicken, if turned on the heap, will traverfe with- 

 out feeding (or very fparingly fo) on the corn, 

 >vhcrever they fpread j and are feemingly infatiable 



