Mr. Delabigarre on Silk Worms, 187 



fign that they are in want of heat ; then you muft warm the 

 room to the degree mentioned in our 6th query. 



We obferved that it was in vain to accumulate food for the 

 worms as long as they were too cool, and deprived of appetite ; 

 too many leaves in that cafe make them cooler than before, 

 and at Lift kill a great number of them. 



(19th QtTE.) What is the interval betwixt the firfl moulting 

 and the fecond, betwixt the third and the fourth ? Is it 

 neceflary to keep the worms warmer, in proportion as they 

 grow bigger ? How often ought their flielves to be cleaned ? 



(Ans.1 I ft. Suppofmg worms in good order and thriving, 

 they will get into their fecond moulting, feven or eight days 

 after the firll, and fo on for the two other following. 



2d. The bigger worms grow, the lefs they ftand in want of 

 heat : however, as long as they eat heartily, it would be 

 needlefs to lejftn or to alter fuddenly the degree of heat which 

 they have been ufed to from their coming out. The only 

 thing which we would recommend after the third moulting, is 

 to open a v/indow for a few hours in the day time, in order 

 to introduce frefli air into the room. 



3d. Provided no diforder, nor too long interval has taken 

 place betwixt one moulting and the other, the fhelves want to 

 be cleaned only once after every moulting ; becaufe, you muft 

 carefully avoid difturbing your w^orms, Notwithftanding, if 



