The time during which men were utterly destitute of a knowledge
of metals, far exceeds the interval that has elapsed since that
important discovery.<31> Scholars divide the stone age into two
parts. In the first, the stone implements, are very few, of
simple shapes, and in the main formed of but one variety of
stone--generally flint~-and they were never polished. In the
second division, we meet with a great many different implements,
each adapted to a different purpose. Different varieties of
stone were employed, and they also made use of bone, shell, and
wood, which were often beautifully polished.

From what we have learned of the development of primitive
society, it will not surprise us to learn that the first
division of the age of stone comprises a vastly greater portion
of time, and is far more ancient, than the second. We will give
an outline showing the order of use of different materials;
but it is here necessary to remark that Bronze was the first
metal that man learned to use, and Iron the second.

ORDER IN WHICH DIFFERENT MATERIALS WERE USED FOR WEAPONS AND
IMPLEMENTS BY PRIMITIVE MAN.
Age of Stone.
Rough, or Old Stone Age--Paleolithic.
Polished or New Stone Age--Neolithic.
Age of Metals.
Bronze Age.
Iron Age.

In this outline the words Paleolithic and Neolithic are the
scientific terms for the two divisions of the Stone Age, and