272 



PLATE CLII L FOG-BOW. 



From a water-colour sketch, representing a camp on the Great Ice Barrier and 

 a Fog-bow, in the small hours of a summer morning. 



Fog, or a white frozen mist, was a common, almost a constant, occurrence for a 

 short while after midnight, during fine still sunny weather on the Barrier. A Fog- 

 bow, such as is here represented, was then sometimes to be seen, if one stood 

 looking in a north-westerly direction, i.e., with back turned to the sun, in the 

 early hours of the morning. It was always small, of white light, not prismatic, and 

 brightest at the ends of the two limbs, which came below the level at which one 

 would have placed the horizon, had not the fog obscured it. A good example 

 was observed on Dec. 17, 1902, near 81 S. lat., and another on Nov. 15, 1902, 

 farther N., both on the Barrier, during the Southern Sledge Journey. 



