SILK-WORMS. 
55 
ment it casts its shell and stretches its head. When 
seen through a glass, it appears to have a white 
collar ; the tail is also bristled with hair. 
While the eggs are in the stove-room, they 
should be stirred round with the spoon two or 
three times a day; this operation is useful, and, 
besides, hastens their coming forth. 
When the temperature of the stove-room is 
l'aised to 75°, it is advantageous to have two 
dishes, in which water may be poured, so as 
to offer a surface of nearly four inches diame- 
ter. In four days there will have taken place 
an evaporation of nearly twelve ounces of water; 
the vapour, which rises very slowly, moderates 
the dryness which might occur in the stove-house, 
particularly during a northerly wind : very dry 
air is not favourable to the developement of silk- 
worms. (Chap. XII.) 
When carefully following the precepts I have 
given, I repeat it, there will invariably result 
the certainty of obtaining silk-worms, healthy and 
strongly constituted. 
Thus the incubation of the silk-worm being 
concluded, let us advert to the preparation of the 
habitation it is soon to occupy, and of the means 
of removing them ; we shall then return to the 
subject of this chapter. 
