'270 RESULTS OF THE METEOROLOGICAL OBSERVATIONS TAKEN DURING 



Mean Wind Force. — Scale 0-12, 



* Mean of 21 days. 



Sunshine. 

 For the registration of bright sunshine, a Campbell-Stokes recorder was employed. 

 This was placed on a cairn close to the magnetic hut. Unfortunately it was impossible to 

 obtain a situation with a good exposure. In summer the sun did not shine on the 

 instrument after 7 p.m., owing to hills to the west and south-west, but from the 

 beginning of November to the middle of February there was a clear horizon from the 

 time of sunrise. At the equinoxes the total possible was ten hours, while at the winter 

 solstice the maximum that could be recorded was only two and a half hours. At this 

 season, however, the actual amount registered even on cloudless days was about an hour 

 less, owing to the feeble strength of the sun's rays. Indeed, on some days that were 

 practically cloudless the instrument failed to record owing to the low altitude of the sun 

 and the number of ice crystals in the lower air. I have endeavoured to compute the 

 total possible sunshine for the different months by taking the values recorded on days 

 in 1903 and 1904 that were either cloudless or which had a very small amount of 

 cloud. The information given under this heading in the following table must, however, 

 be looked on as a tolerable approximation. 



