Copper by itself is so soft that it would not be of much use to man, except the experience they would gain of melting and molding. In our own country the aboriginal inhabitants were well acquainted with copper, and even knew how to mold it. Yet, except as just pointed out, it is not probable that it exerted any marked influence on their development.7 In the old world supplies of native copper are limited, and recourse must be had to the ores of copper. Now these ores, such as copper-pyrites, are nearly always of a bright color, and as such would attract the attention of primitive man. They might suspect that these bright colored ores contained copper from finding similarly colored ores in connection with native copper, in fact passing from one form to the other. But it requires no little skill to reduce the ores of copper; and, when obtained, for reasons just pointed out, it would not be of great utility. But primitive man was thus cautiously and experimentally feeling his way to a knowledge of metallurgy. All the evidence obtainable goes to show that tin was known as early as copper, or at least soon after. Its ores though not striking on account of their color, are on account of their great weight. It is comparatively easy to reduce it from its ores. It is quite widely distributed over the earth. It often occurs in the gravels of rivers, where, as we have already mentioned, primitive men must have, at a very early date, sought for gold. Owing to their weight, the gravel of tin-stone would remain behind with the gold when it was washed. “In process of time its real nature might have been revealed by accident; and, before the eye of the astonished beholder, the dull stone, flung into the fire, became transfigured into the glittering metal.”8