THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 



275 



Phenomena. 



The following table shows the number of times certain phenomena were recorded. 

 Cases of some of tlie more unusual phenomena are referred to in the meteorological log. 



Hours of Occurrence. 



With regard to mist or fog, only those cases were recorded in which the observer 

 was actually enveloped in it. It is of interest to note that no appearance of the aurora, 

 and no case of lightning accompanied with thunder, was recorded. 



"Fohn" Winds. 



" Fcilm " winds take place with winds from WNW., in which direction there is a 

 considerable area of high land over which the air has to pass before reaching Scotia Bay. 

 The descending current warmed dynamically by compression may produce as high a 

 temperature in midwinter as in midsummer. Thus on 31st May 1903 the shade 

 thermometer at 1.15 p.m. rose to 46°-8, while, as already stated, the absolute maximum 

 was 47°'5 on 11th February 1904. On this day the "Scotia" at noon was in lat. 55° 35' S. 

 long. 54° 5' W., being then over five degrees of latitude to the north of the Orkneys, 

 but while the " Fohn " was blowing, lower temperatures were recorded on the ship than 

 at the Island. The following are the readings of pressure, temperature, and wind 

 at 3, 4 and 5 P.M. on the day referred to : — 



