FIG. 2.—TUMBLER.
The toy shown in [Fig. 2] is made upon the principle just described, but the round ends of the figure furnish the rolling surfaces, and a bullet is used for the weight instead of a globule of mercury, the body being simply a straight paper tube with convex ends.
COLUMBUS’S EGG.
The accompanying engravings represent an object sold in the London bazars. It is made of tin, is painted red, and is called “Christopher Columbus’s Egg,” because those who do not know how it is constructed cannot make it stand up on the projecting part situated at the base. This egg, which it is impossible to open, is hollow, and contains a leaden ball which causes it to fall over on its side, unless it (the ball) is in the longer axis.
FIG. 1.—COLUMBUS’S EGG.