84 
THE ART OF REARING 
hundred and twenty, pounds of cocoons from each 
ounce of eggs, which others obtain, consuming 
the same quantity of leaves, and differing only in 
the hatching of two ounces of eggs. But as I 
said before, the great and principal aim of the 
art of rearing silk-worms, is to obtain from one 
given quantity of mulberry-leaves the greatest 
possible number of cocoons of the finest quality. 
It is not the trifling loss of an ounce of eggs 
which should induce a change of system of ha- 
bits, but the following advantages : for it is a 
true fact, that, 
1. When with one ounce of eggs one hundred 
and ten or one hundred and twenty pounds of co- 
coons are obtained, about one thousand six hun- 
dred and fifty pounds of the mulberry- leaf will be 
used. (Chap. XIY.) 
2. That when only fifty-five or sixty pounds of 
cocoons are produced from one ounce of eggs, 
about one thousand and fifty pounds of mulberry- 
leaves have been used ; under this supposition, it 
would appear that two thousand one hundred 
pounds of leaves are requisite to produce one hun- 
dred and ten, or one hundred and twenty pounds 
of cocoons. 
3. That one hundred and ten, or one hundred 
and twenty pounds of cocoons, obtained from one 
ounce of eggs, are worth a great deal more than 
a similar quantity obtained from two ounces of 
