Chap. IV. O F G R A N A R I E S. 4(^5 



noftic : but we muft not conclude from hence, that this method 

 will abfolutely prevent the mifchief. It may be fuppofed, that the 

 care we had taken, in thefe experiments, to clean the corn, h,^d 

 entirely freed it from them : and it may be ohjedled, that this great 

 care cannot be taken in large ftores, and that, if any fliould ger 

 into the heap, they would be by fo much the more dangerous, a? 

 they would remain longer undifturbed. 



The moth lays its eggs on the corn, and thofe eggs produce v/orm» 

 or caterpillars, which feed on the corn, and fpin a filky web, which 

 extends fometimes to three or four inches deep, and entirely 

 fpoils all the grain within that, depth, befides communicating a bad 

 fmell to the whole mafs. 'unc: i. 



In the winter of 1746, we colledled from our ordinary granaries 

 all the wormy crufts thus formed, which were very thick, the moths 

 having been very numerous the preceeding fummer : thefe cruftt 

 were broken and fcreened, and what grain could be got from them, 

 which undoubtedly was impregnated with the eggs of the moths, 

 was put into one of our granaries of prefervation, which contained 

 feventy-iive cubic feet, and was ventilated from time to time all the 

 winter. 



About the end of May, if the vent-holes at top were opened, a- 

 vafl number of moths flew out ; which fliewed they did not like 

 their fituation. 



In June 1747, the granary w^s emptied: the moths and worms 

 had all perifhed, and there remained only a thin cruft, about one 

 eighth of an inch thick, on the top of the corn, which had fo far 

 loft the bad fmell it had when put into the granary, that it fold for 

 the current market-price. 



Of the Weevil. 



'T~*HE weevil is of the beetle kind. It devours a great quantity 

 ■*■ of corn, as well old as new, but does not communicate any 

 bad fhiell to it, as the moth does. It will endure the heat necef- 

 fary for kiln-drying, and is numbed, but not deftroyed, by intenfe 

 cold. The weevils are generally found collected in heaps, which 

 feel very warm. This warmth is probably neceffary for hatching 

 their eggsj and if fo, they will not be in a condition to pro- 

 pagate their fpecies in our granaries. No fmoke will deftroy 



O o o them. 



^•„ 



