First Lessons in Natural Philosophy for Beginners

by Joseph C. Martindale

The beds of the creeks and rivers are so many inclined planes down which their waters flow.

Wedge.

What is a wedge?

A wedge is a double inclined plane, as is represented in [Fig. 59].

Fig. 59.

Of what use is the wedge?

The wedge is used in splitting logs of wood and blocks of stone.

For what other purposes is the wedge used?

The wedge is used to fasten handles in hammers, hatchets, axes, and hoes.