O F S I L K. 187 



hurdle of wicker, fitted to the infide of the 

 vefl'el, about an inch diftant from the wa- 

 ter : you may fix it thus by driving three or 

 four nails, which fliall fupport it firmly at 

 this diftance. 



Having fixed the hurdle firmly, and alfo 

 fupported it by a prop in the middle, if it 

 is liable to bend, throvi^ over it a coarfe 

 woollen cloath, ur fomething of the nature 

 of taylor's wadding, which will eafily let 

 the fteam pafs j and on this place the (ilk- 

 balls, covering them clofe with a thick 

 flrong cloth. You may pile them about 

 four inches, or as high as the fuiibcating 

 fteam of the water can reach, which you 

 may judge of, by putting your hand under 

 the cloth which covers them -, when they 

 have been there long enough for the fleam 

 to get through them, for if the heat there 

 is uneafy for the hand to bear, it is fuf- 

 ficient, and an hour or tv/o continuance 

 in fuch heat will kill the chryfalis. 



When the water cools, fo as not to be 

 uneafy to the hand, it mufl: be changed for 

 other boiling water, therefore you ihould 

 have a kettle conftantly on the fire to fup- 

 ply you, and one fupernumerary veiiel 

 which you fhould fill with boiling water 



whei^ 



