226 THE CULTURE 



what lefs than the mouth of an earthen 

 pot, which holds the fumigating materials, 

 this pot being placed on a chaffing-difh of 

 coals, and its mouth brought up clofe to 

 the hole in the funnel, will fend the fume 

 up into it, which the air, entering by the 

 funnel's mouth, will drive it into the room, 

 and the offenfive fteam of the coal will be 

 thus avoided. It may be convenient to let 

 the funnel incline a little, that the fume 

 may the eafier afcend into the room. This 

 method fuppofes the room to be contrived 

 in fome of the manners above defcribed, 

 for the admifiion of frefh air, and letting 

 out the foul, becaufe the fume fhould come 

 in by the apperture which admits frefh air. 

 When filkworms become fick and languifh 

 by a continuance of moifl weather, it is 

 difficult to relieve them, it being as yet a 

 defideratum among inventions, to fupply 

 quantities of dry air from a moifl at- 

 mofphere. Fires may indeed warm the 

 air, and fo hinder the bad efFedl of its cold- 

 nefs } but flill the air which is conftantly 

 drawn into a room where there is a fire 

 muft be fupplied by the atmofphere, and 

 bring its moifture along with it. It is bell- 

 in this cafe to admit no more external air 



than 



