XII. One hundred worms just hatched weigh 
about 
Grs. 
I 
After their first moulting, . . . 15 
" " second " . . . 94 
" third " ... 400 
" " fourth . . . 1628 
On attaining their greatest size and weight, 95 00. 
XIII. Of the cocoonery 2J\<\ feeding. 
A room with windows on all sides except the 
east is preferable. Perfect ventilation is of the 
utmost importance: for this purpose numerous ven- 
tilators must be made. 
The worms not being of a wandering disposition, 
are placed on frames or "trays," the most convenient 
size being two by two and a quarter feet. A tray of 
this size will hold from four to five hundred worms. 
On the bottom of the trays, twine or cane may 
be stretched across, forming a network on which 
the worms are placed. 
In feeding young worms (i. e. worms not yet too 
large to crawl through the meshes of mosquito net- 
ting), place a piece of mosquito netting of a conven- 
ient size to cover all the worms, over them ; on top 
of this put a number of pieces of mulberry leaves : 
the healthy worms will soon crawl up on to the fresh 
