vm 
PREFACE. 
very fully; and they who follow the princi- 
ples there laid down, need no longer fear 
such a consequence. 
It is not the province of these remarks 
to investigate the mode of avoiding the 
evils above described ; the necessary mea- 
sures are amply pointed out in the body 
of the work. It will not, however, be 
useless to beg those readers, who may de- 
sire a fuller insight into this interesting 
subject, to bear ever in mind, that the 
Silk-Worm is an exotic, to whose health 
the torrid summers of Italy are no less 
prejudicial, than the cold climate of the 
north. 
In its native regions it passes its short 
existence on the branches of those trees 
that furnish its food, exposed to the warm 
breezes of an eastern climate, which sup- 
porting its life, at the same time carry off 
those pestilential vapours, that are liable 
to collect around it in situations more 
confined. A system of management, there- 
fore, which may as nearly as possible 
assimilate our own to that climate, and 
which may have the effect of placing, as 
