i^o Mr. Delahigarre on Silk IVorms, 



and we may affert with confidence, that the mulberry feems 

 referved to the filk-worm alone, no other worm or caterpiller, 

 whatever likenefs they might have in their fhape," habits, &c. 

 to our filk-worms, ever feed upon mulberry leaves. Caterpillers 

 may be feen by chance upon mulberries, but if you take the 

 trouble to look attentively, you will perceive that they foon 

 leave that place where they came by millake, or by a 

 mere accidental wandering as they might have come upon a 

 ilone, &c. 



(23d Que.) Is it neceifary to keep the worms in darknefs ? 

 Does a full light hurt them ? ■ 



(Ans.) It has been obferved long ago, that the filk-worm is 

 inclined to avoid a bright light. Many naturalifts confider 

 him as a nocturnal infeft. You may remark as a proof of it, 

 that filk-vv^orms are eager to conceal themfelves under leaves in 

 the day time, and when there is any diforder in a worm's 

 houfe, you will find many more of them fick in places moft 

 expofed to the light than any VN^here elfe. Therefore we advife 

 to (hut up the windows of the room in the day-time, or in cafe 

 the weather fliould be too hot, to, hang up brown or green 

 curtains, and let them open in the night. 



(24th Que.) Is heat more noxious to filk worms than cold? 



(Ans.) The diiFerence is fuch, that a great heat makes- 

 worms lazy, dejcded, and without appetite. An cxcefTive 



