232 
THE ART OF REARING 
The moth produces, in the first 36 or 40 hours, 
the greatest jiart of the eggs it contains ; those 
which are afterwards laid, amount only to about 
the sixth part of those already deposited. There 
are, however, some moths which produce more 
than the sixth part after the first 36 or 40 hours. 
Particular differences among the females occa- 
sion a great difference in the time employed in 
laying their eggs. 
Of all the different methods employed to ob- 
tain eggs, that which I have explained procures 
the greatest quantity of them. 
When, after 36 or 40 hours, you have removed 
the moths from a part of the linen, it is observed 
not to be well stocked with eggs, other females 
must be placed there, in order that the eggs may 
be equally distributed over the whole of the 
linen. Some moths crawl about on the linen, and 
sometimes stray from it ; however, in general, 
they remain fixed on the spot where they were 
placed, or remove very little from it. 
When the season, or the temperature of the 
room, is too hot, that is to say, when it mounts up 
to 78° or 80°, or when it is too cold, for instance, 
64° or 66°, you will find more or less of yellow 
unimpregnated eggs, or of a reddish colour 
imperfectly impregnated, which do not produce 
worms. 
Having separated, with care, these eggs from the 
