320 
THE ART OP REARING 
required to form the hedges and cabins sufficient 
for receiving the worms of one ounce of eggs ; 
that is to say, 1201bs. of cocoons ; but I have not 
been able to fix any certain rules, as the varieties 
of brush-wood, haulm, straw, heath, or vegetable 
substances used for the purpose, differ so much in 
weight, that the calculation would scarcely be 
correct ; 1501bs. of haulm weigh as much as 
4501bs. of heath, and that again as much as 
7501bs. of broom. 
3. Facts relative to the Quantity of Mulberry 
Leaves consumed by the Silk-worms in their 
different Ages. Observations on the Subject. 
The result of the most exact calculations is, that 
the quantity of leaves drawn from the tree, em- 
ployed for each ounce of eggs, amounts to one 
thousand six hundred and nine pounds eight ounces, 
divided in the following manner : — 
Per ounce of Eggs, sorted leaves 1362 * 
* I have given some idea in the course of this work of what 
I mean by sorted leaves, but I will further explain. Great 
care must be taken in picking and sorting the leaves for the 
feeding of the worms of the first ages, such as picking off all 
the twigs, stalks of the leaves, spots, &c., and to clear them as 
lbs. 
First age, sorted leaves 
Second age, ditto ditto 
Third age, ditto ditto 
Fourth age, ditto ditto 
Fifth age, ditto ditto 
