leaves, and the stale leaves underneath may be 
removed. 
In feeding older worms, place the leaves on top 
of the worms, and remove the litter as often as pos- 
sible. (It may be appropriate to remark here, that 
the warmer the atmosphere in which the worms are 
reared during the first age, the sooner will they spin 
cocoons ; the only economy in having worms to spin 
soon is in the time saved, as they consume the same 
quantity, of leaves during the caterpillar period, 
no matter what the temperature was in which they 
were reared.) 
Silkworms naturally are quite hardy. If they 
are attended to as described above, they will not be 
subject to any disease; but they are frequently 
reared in damp places or in impure air, which will 
produce the diseases which are described in the 
next section. 
SECTION II. 
THE DISEASES OF SILKWORMS. 
As already remarked, the diseases of silkworms 
are generally the result of bad treatment. Their 
causes and remedies are as follows : 
I. Diseases in consequence of defective eggs, 
or in preserving them. The worms will become 
diseased — 
