O F S I L K. ^9 



mates to avoid violent heats, and in 

 temperate ones great colds, and in both 

 moiflure. 



The room hi which they are kept ought 

 to have windov^s oppolite one another, 

 that is to fay on the Eafl and Weft, or on 

 the North and South, fo as that, by open- 

 ing the oppofite windows during very hot 

 weather, the air may have a free current 

 through, in order to refrefli and clear the 

 place of bad air or fmells. Thefe windows, 

 provided they Ihut clofe, may be made 

 either of thin canvafs, which is beft in 

 warm climates, or of glafs, oiled paper, 

 tranfparent membranes, or any other ma- 

 terial which will prevent the cold and ad- 

 mit light ; and it will be neceflary to have 

 nets, or fomething of that nature, to pre- 

 vent the entrance of birds when the Vvin- 

 dov/s are left open, which might make 

 great havock among the worms, unlefs 

 you only open them while you are prelent. 

 No bad fmells, fach as thofe of fmoak, 

 fewers, or fuch like, fliould approach their 

 lodgment ; and all crevifes which migl>t 

 admit or harbour rats, mice, fnakes, 

 fpiders, crickets, or other vermin Ihould 

 be clofe ftopped, for fpiders and other ver- 

 F 3 min 



