By JOHN WINGATE THORNTON.

Octavo, cloth, $1.50.
GEOLOGICAL MAP OF THE UNITED STATES AND BRITISH PROVINCES.
With an Explanatory Text, Geological Sections, and Plates of the Fossils which characterize the Formations.

By JULES MARCOU.

Two volumes.

Octavo, cloth, $3.00.
==> The Map is elegantly colored, and done up with linen cloth back, and folded in octavo form, with thick cloth covers.
KNOWLEDGE IS POWER.
A view of the Productive Forces of Modern Society, and the Results of Labor, Capital and Skill.