H.G. KAISER, Sun Cycle. December 21, 1917. Looking South from Government Hill.
This photograph was taken in Anchorage, Alaska. The image is made up of 12 exposures—one per hour—tracking the sun's movement in the sky. Because of the northernly location, the sun does not rise as high as it would farther south. This explains the lower arch of the sun's pattern during the 12-hour period.