Note 10 — HOME STUDIES IN CHEMISTRY AND PHYSICS.

“The mound builders.” The race of people found in America by its first settlers had clearly been preceded by a race of higher type and attainments. Relics proving this have been discovered throughout the Mississippi valley. Earthworks are their principal testimony, of which many thousands have been found in Ohio alone. These mounds vary in size and shape, but are always regularly formed, sometimes being square, sometimes round, hexagonal, octagonal, or truncated. They are ascended by spiral paths, and frequently contain skeletons. Sometimes the earthworks are thrown up so as to represent in outline men and animals, and appear as huge “bas-reliefs on the surface of the ground.”