SILK-WORMS. 
173 
greatest abundance ; an incredible quantity ex- 
haling from the body of the silk-worm while it is 
making its cocoon, and even after the formation 
of the cocoon. 
I must add, that if the quantity of leaves I ap- 
pointed for the tenth and last day of the fifth age 
be insufficient, a very little more should be allowed 
them ; for they should now be stinted, even if there 
chance to be some leaves left. And also should 
the worms take eleven days, instead of ten, to come 
to perfection, the same quantity might suffice. 
There are causes w'e cannot trace, which hasten 
or slacken the progress of the silk-worms towards 
maturity, by some hours. 
These are the subjects of the following para- 
graph : 
1st. Matured perfection of the silk-worm. 
2nd. First preparation for forming the espalier, 
or hedge, for the rising of the silk-worm. 
3rd. The last feed given to the silk-worms. 
4th. Cleaning of the wicker tray, and conclu- 
sion of the wood-work and espalier. 
5th. Separation of the silk-worms that will not 
rise on the espalier ; and last cleaning of the 
wickers. 
6th. Care of the laboratory until the worms 
have accomplished the fifth age. 
7th. Quantity of excremental substance, va- 
pour, and gas, produced by the silk-worms, from 
