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Every large object to be imitated in wax should be cast hollow; and therefore, though the transparent lightness required in the imitation of fruits is not requisite in an artificial egg, the egg may be cast upon the same principle as a piece of fruit, in the following manner. Firstly. The two pieces of the plaster of Paris mould must be soaked in hot water for ten minutes. Secondly. The wax should in the meantime be very slowly melted in a small tin saucepan, with a spout to it, care being taken not to allow it to boil, or it will be discoloured. As to the quantity of wax to be melted, the following is a general rule:--If a lump, the size of the object to be imitated, be placed in the saucepan, it should be sufficient for casting twice, at least. Thirdly. As soon as the wax is melted thoroughly, place the saucepan on the hob of the grate, and taking the parts of the mould from the hot water, remove the moisture from their surfaces by pressing them gently with a handkerchief or soft cloth. It is necessary to use what is called in some of the arts "a very light hand" in this operation, especially in drying moulds of fruits whose aspect possesses characteristic irregularities--such as those on the orange, the lemon, or the cucumber. The mould must not be wiped, but only pressed. If the water has not been hot enough, or if the drying is not performed quickly, the mould will be too cold, and the wax will congeal too rapidly, and settle in ridges and streaks; on the other hand, if the wax has been made too hot, it will adhere to the mould, and refuse to come out entire.