FIG. 4.
Having borrowed a hat, place it upon the table, and, after secretly introducing the cake into it ([Fig. 4]), take an empty egg, crack the shell upon the edge of the plate, and, inserting your hands in the hat, make believe empty the contents of the egg into the latter ([Fig. 5]).
FIG. 5.
In order that the means employed may not occur to any one, take the perfect egg and let it fall upon the plate so that it will break and its contents flow out. Then take the remaining egg and operate as with the first. All you have to do then is to pass the hat back and forth a few times over the flame of a candle in order to cook the mass and then to serve the cake.
THE EGG AND HAT TRICK.
An effect due to an invisible thread is the following: