A

SYSTEM

OF

THEORETICAL AND PRACTICAL

CHEMISTRY.

PART XXX111.

METALS.

Among die simple substances which present themselves toour view in examining the products of nature, there are noneof which the study is more important dian METALS. Theirutility is highly interesting. They may be considered as thegreat instruments of human industry. Many of the mechanicarts could not possibly exist without them, and it is even doubtfulwhether mankind, would have acquired that degree of civiliza-tion which characterizes the present state of society.

Vol, ii. A