An erroneous perception of reality
3 Mirage and similar phenomena and the aurora are common.
Strobridge, In Miners' Mirage Land (Los Angeles, 1904); H.
North-west is the Store Vildmose, a swamp where the mirage is seen in summer.
The distribution of density is similar to that attending a desert mirage, but the transition is not so abrupt.
Another type of mirage, frequently observed at sea in the northern latitudes, is presented in the appearance of ships and icebergs as if inverted and suspended in the clouds.