Note 131 — Chapter IV
Reading edition
Colonel Bouchette observes, that, according to the altitude of the sun, and the situation of the spectator, a distinct and bright iris is soon amid the revolving columns of mist that soar from the foaming chasm, and shroud the broad front of the gigantic flood. Both arches of the bow are seldom entirely elicited, but the interior segment is perfect, and its prismatic hues are extremely glowing and vivid. The fragments of a plurality of rainbows are sometimes to be seen in various parts of the misty curtain.