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pernicious infe61 I am treating of, might not, by fome means, be 

 deftroyed in the granaries, fo as to prevent their pro}5agation. 



For this purpofe I took a round glafs veflisl, large enough, as I 

 fuppofed, to hold fix pints of water, and in it I put eight living 

 moths newly taken. In the orifice of this veHel I fet fire to the fourth 

 part of a grain of fu!phur, and as foon as the moths began to feel 

 the vapour, or fmoke of the fulphur, they fluttered about the glafs 

 with great violence, though but for a fhort time, for they all fell to 

 the bottom, and after a little motion in their feet, they died. Four 

 hours afterwards, I took them out of the glafs, and put into it fome 

 frefii ones alive, in order to repeat the experiment, but while I was 

 preparing to burn the fulphur, I faw tliem all lie dead, they having 

 been killed with the bare odour cf the fulphur Vvliich had been left in 

 the glafs. 



From the fize of this glafs, I computed what quantity of fulphur 

 would be requifite to fumigate a granary twenty four feet long, fix- 

 teen broad, and eight feet high, and I reckoned that half a pound 

 would be fufiieient for the purpofe. 



After this,. I fumigated a granary, in which were eight loads of 

 wheat, and a great number of motl-s flying about. For this purpofe 

 I took two pieces of fulplrur, containing about a quarter of a pound, 

 prepared in the fam.e manner as is done by wine-merchants or coopers, 

 to fumigate their wine cafKs. Thefe pieces of fulphur I fufpended by 

 a brafs wire, in a tall earthen vcflel, with a narrow top, and placed 

 the vefl'el in an earthen difh, to prevent any danger of fire. This 

 apparatus I fet in the middle of the wheat, and as foon as the fulphur 

 began to burn, I retired cut of the granary and fnut the door. In 

 a large granary two or three of thefe vefl'els might be ufed. 



Two days afterwards, I vifited the granary, and then i faw feve- 

 ral moths ilill clinging to the wall and beams, but before the fumi- 

 gation, I believe there were ten times as many. And I accounted for 

 thefe moths being found alive, either becaufe many of the panes of. 



