SILK-WORMS. 
161 
In the course of the fifth age the wicker trays 
should be cleaned. If the litter is dry and fresh, 
they need not be shifted till the evening of this 
day, or the beginning of the second day ; but 
this must depend on circumstances, and the con- 
venience of the cultivator. 
Care must be taken in distributing the last 
meal on this day, only to feed four wicker trays 
at a time, to allow of time insensibly to lift off 
the silk-worms before they have finished eating 
the leaves given them. 
As this time the worms are not to be removed ; 
the wickers must be cleaned after another man- 
ner. 
The following is the manner of cleaning them. 
The portable trays are put on the edges of the 
wickers, and when the leaves are loaded with silk- 
worms, they are put in single layers on the portable 
trays. When several of these are filled, the litter, 
with or without the sheet of paper, must be carried 
off in the square baskets, (Fig. 19) which are 
hung near the wicker trays : the litter being re- 
moved, the paper should be swept and cleaned 
with light brooms ; the sheets of paper are laid 
down again, one after another, and the leaves 
with the worms replaced on them. This is re- 
peated until the litter has been entirely changed 
throughout the laboratory. 
When one basket is full it is carried out, and 
