MATERIAL FOR FUMIGATION. 2I9 



tea fpoonful of nitre grofsly powdered > to a 

 pint of water. After the puffs are foaked 

 therein, they are to be well dried, and, thus 

 treated, will quickly take fire, and retain it. 



But if puffs are very bad, rub a piece of 

 camphor, of the bignefs of a pea, to powder, 

 and then add a little linfeed oil. This 

 being fmeared lightly over a puff, will im- 

 mediately take flame by a candle ; blow 

 the flame out, the puff will continue to hold 

 fire, and fume till reduced to tinder. 



It is to be noticed, that moil dry puffs will 

 readily hold fire in the open air : but when 

 introduced into a clofe box, excluded from 

 frefh air, they cease to fume. And mould" 

 frefh air be admitted, it would counteract 

 the ftupefying quality of the fume already 

 admitted, and delay the operation, or 

 make it wholly unfuccefsful ; therefore the 

 leaf! frefh air poffible fhould be admitted. 



No. 



