SILK-WORMS. 
83 
quantity of cocoons ; and thus the observation is, 
that if five ounces of eggs, produced thirty-five 
pounds of cocoons per ounce ; four ounces would 
produce forty pounds per ounce, three ounces 
forty-five pounds per ounce, two ounces fifty 
pounds, 8cc. S>'C. 
These differences, it should be known, do not 
depend on the organization or natural condition 
of the silk-worm, but are solely to be ascribed to 
error and ignorance. Facts and most evident 
reason surely prove that, if the silk-worm have 
had space, if the degrees of temperature have 
been exactly regulated, if the necessary quantity 
and quality of food has been given the silk-worms, 
and that all the care l have recommended has 
been practised, the quantity of cocoons should be, 
and always will be, proportioned to the quantity 
of eggs that were hatched. Those who do not 
obtain this result should attribute their failure 
to the erroneous system they have adopted. My 
laboratories are of various sizes ; that which I am 
going to describe is calculated for the reception 
of the worms proceeding from five ounces of 
eggs ; the other laboratories equally yield co- 
coons in proportion to the eggs which I have 
hatched. 
I should allow the advantage of my manner of 
rearing silk-worms to be most trifling, if it were 
only in the product of the hundred and ten, or 
