ig6 Mr. Delahigarre on Silk -Worms, 



of fldll In ralfing room fiik worms, bring upon them the 

 greateft part of their, diforders ; however it is necefiary to be 

 acquainted with thofe different diforders. 



111. Some worms turn fat, and are eafily difcovered in the 

 time of every moulting, becaufe they never undergo that 

 natural change pecuHar to the good worms, as ftated in our 

 15th query. The fat worms inftead of remaining flill or 

 motionlefs in the time of moulting, are moving about and 

 eating ; they continue to grow and are eafily diftinguiihed, 

 being a great deal whiter and looking oily ; they muft be 

 thrown away for fear they fhould fpoil the others : befides, as 

 they perilh fooner or later, it would be an ufelefs trouble to 

 feed them longer. 



2d. This fecond diforder is quite the reverfe of the firll:. 

 After the third or fourth moulting, fome worms become lean, 

 they refufe to eat ; then turning foft, fmaller and fliorter by 

 half than they were before : they mull die in the courfe of three 

 or four days, as in a confumption. 



3d. The yellow worms never appear but a little before the 

 time of fpinning, inftead of becoming mature, they fweli up, and 

 you may perceive feveral nally yellowilh fpots, on their head firfl 

 and foon after fpreading all over their body j they mud be 

 thrown away. 



It is eafier to defcribe thofe diforders, than to point out the 



