Constellations above Southern Horizon.
Invisible—Noon, Autumn Equinox.
Visible—Midnight, Spring Equinox.

5,744 B.C. Lat. 45° N.

5,744 B.C. Lat. 45° N.

Constellations above Northern Horizon.
Invisible—Noon, Autumn Equinox.
Visible—Midnight, Spring Equinox.

FIG. 1.

PLATE XIX.

FIG. 2.

Constellations above Southern Horizon.
Invisible—Noon, Autumn Equinox.
Visible—Midnight, Spring Equinox.