2541. Casting Second Half of Mould
Into the small pudding basin from which the sand has been emptied, place with the egg upper-most the half mould, which, if the operation has been managed properly, should
fit
close at the edges to the side of the vessel; then prepare some more liquid plaster as before, and pour it upon the egg and mould, and while it is hardening, round it with the spoon as with the first half.
2542. Completion of Mould
In due time remove the whole from the basin; the halves will be found readily separable, and the egg being removed, the mould is ready to cast in, after it has been set aside for an hour or two, so as to completely harden. This is the simplest form of mould, and all are made upon the same principle.
2543. Casting Egg in Wax
The casting of an egg is not merely interesting as the first step in a series of lessons, but as supplying a means of imitating peculiarly charming objects, which the student of natural history tries almost in vain to preserve. We shall proceed, then, with the directions for the casting of an egg in the mould.