SILK-WORMS. 
G9 
once the laboratory is established it lasts for 
life. 
The proportion of the boxes which I have stated 
as necessary for hatching the silk-worms should 
not be altered ; as this proportion prevents any 
necessity of ever touching the eggs from the 
moment the silk-worms begin to appear. 
The perforated paper, being large enough to 
support a number of the small twigs of the mul- 
berry, it consequently enables us to remove a 
large portion of the silk-worms at once. In using 
these small boxes, the egg-shells will always ad- 
here together, and when the boxes are lifted they 
should be slightly shaken horizontally, to move 
the eggs. If in moving the eggs some of the 
holes in the paper should be stopped up with the 
eggs, it is of no consequence, as it will not pre- 
vent the worms climbing up. Should there be 
any wish to see the species of tissue which unites 
the silk-worms to the eggs, by gently lifting the 
perforated paper it may be examined, but the 
paper must be carefully replaced. Before the 
appearance of the worm, even the eggs adhere, 
and are fastened together by a substance, or exu- 
dation of the egg, which cannot be discerned even 
with glasses. 
Whenever a sheet of paper is prepared for the 
arrangement of silk-worms, there should be in- 
scribed upon the paper itself the hour in which 
