96 
THE ART OF REARING 
their first age ; which has allowed of some having 
fed well, while others could not feed ; of some re- 
maining under the litter, others upon it, which 
latter had the benefit of free air, instead of a close 
mephitical atmosphere ; some began to fall into 
their torpid slumber sooner than others, and being 
under the leaves, have moulted the last ; othei's, in 
short, became torpid latest and revived first, be- 
cause they were upon the surface of the leaves, 
unloaded and unoppressed. 
2d. By not having placed the sheets of silk- 
worms hatched the first day in the coolest parts 
of the laboratory. 
3d. By not having placed the latest hatched 
worms in the hottest part of the laboratory. (Chap. 
IV. § 3.) 
4th. And finally, by not having given the last- 
hatched silk-worms intermediate meals, to bring 
on their growth a little faster. 
It follows from this want of attention, that 
when the silk-worms should pass from their first 
casting, or moulting, to the second, some worms 
are torpid, some are reviving and beginning to 
feed, and some have not yet fallen into the tor- 
por which is to precede their change ; and thus on 
one wicker-hurdle may we see silk-worms of 
all sizes, which is most troublesome, to say no 
more ; there is besides a great chance of the smaller 
worms perishing in their progress. 
