156 
THE ART OF REARING 
fill the space of rather more than two wicker trays; 
and there should be formed a space in the middle 
of the two wicker trays, of about half the width of 
the tray. 
When 508 square feet are filled, the trays that 
are left empty should be cleaned. 
If in cleaningany worms should be found roused, 
by putting some shoots or leaves, they may be 
taken off like the others ; should some rouse after 
this, they may be taken up with the hand and put 
with the others ; but if any remain still in torpor, 
they must be cast away. 
The sheets of paper with the litter must be 
rolled up, as was done in the former age, and 
poured into the basket prepared for this (Fig. 24), 
which is carried out at once. 
In observing the litter when it is removed into 
a dry place, should some roused worms be found 
in it, they may be placed distinct from the others, 
in the warmest parts of the laboratory, with more 
space, that they may thrive faster, and be even 
with the early worms. 
The litter removed will appear constantly 
green, and be without any unpleasant smell ; but 
notwithstanding this, while the wickers are clean- 
ing, the fumigating bottle should be passed two 
or three times through the laboratory. 
It must be managed, that the worms should 
cover rather more than half the space which is al- 
