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Its upper limit is very distinct, as seen by the “false” horizon.

They ranged southward to the point where vision failed against the false horizon of dull amber haze.

On holidays, when the sun was up in the sky, the Captain delighted to accompany his pupils to some open space, where, with the aid of a false horizon, he could teach them practically how to take an observation or to “shoot the sun,” as he called it.

The sky was losing its burnished copper hue and becoming blue again, and, on the false horizon supplied by the crest of the fog-bank, stood a brilliantly vivid panorama.

One of the officers of Admiral Rodgers' expedition climbed to near the top of Herald Island, at a time of great refraction, when probably a false horizon existed, and hence did not see Plover Island, although Wrangell Land was in sight.