Accordingly, the Contriver of the eye has hung it with a hinge.

Now there are various kinds of hinges, moving in one direction, and the Maker of the eye might have made a hinge on which the eye would move up and down, or he might have given us a hinge that would bend right and left, in which case we should have been able merely to squint a little in two directions.

But to enable one to see in every direction, there is only one kind of hinge that would answer the purpose--the ball and socket joint--and the Former of the eye has hung it with such a hinge, retaining it in its place partly by the projection of the bones of the face, and partly by the muscles and the optic nerve, which is about as thick as a candlewick, and as tough as leather.

Most of you have seen a ship, and know the way the yards are moved, and turned, and squared by ropes and pulleys.

The rigging of the eye, though not so large, is fully as curious.