338 
THE ART OP REARING 
others extract less silk, because the water is too 
hot in which they spin. 
Much is annually lost, by the awkwardness and 
carelessness of the spinners. 
6. Facts relative to the Production of the Eggs. 
Three-hundred and sixty cocoons, of the finest 
quality, weigh about 25 ounces. If we suppose 
half of these to be females, these will be about 
180. 
Each impregnated moth weighs about 32 grains, 
and altogether 5740 grains, which make about 
10 ounces. 
After four, five, or six days, each moth will 
have laid, on an average, 510 eggs. 
This number of eggs is equivalent to 7^ grains, 
as 68 eggs weigh a grain. 
The 180 female moths consequently lay 91,800 
eggs, which weigh 1350 grains, or about two 
ounces and one-third. 
This proportion of two ounces one-third per 
pound of cocoons, augments and diminishes, ac- 
cording as in the 360 cocoons which form one 
pound and a half, females predominate, and vice 
versa. 
At the end of four days, the 180 moths that 
have laid their eggs only weigh 1800 grains. As 
it has been stated, that the eggs weighed 1350 
