51�Թ�

The tricks of the Antarctic atmosphere brought mock suns and green sunsets, and showers of jewel-colored ice crystals.

At each point of contact occurs a parhelion which is a mock sun of brilliant colors and called a sun-dog.

Several mock suns were observed, and on December 18th an eclipse of the moon occurred, during which this luminary was surrounded by a transparent circle, within which was a cross quartering the moon.

Beyond that again is a lens which throws an enlarged image of the aperture on the screen, which we may call our mock sun.

Sometimes the Aurora Borealis would flash up still further northward; and sometimes Aurora Parhelia—mock suns and mock moons—would appear in varied beauty in the starry sky.