250 RESULTS OF THE METEOROLOGICAL OBSERVATIONS TAKEN DURING 



Comparing the cloud amount, overcast sky or fog being equal to lO'O, we have the 

 following values : — 



From the above it is evident that the Weddell Sea is verj^ cloudy when compared with 

 lower latitudes and with Graham's Land. Indeed, for days together the sky was 

 uniformly covered with a pallium of stratus. 



With regard to the winds, the most frequent direction was ISI.E. with 16 per cent, of 

 the whole, closely followed by N. with 15 per cent. Taking the combined observations, 

 it cannot be said that there was any marked excess of one direction over another ; but 

 an examination of the values for short periods will show very clearly that easterly winds 

 prevail in the Weddell Sea south of the Antarctic Circle, while north of 62°-64° the 

 north-westerly wind system is entered. 



The relative humidity, 83 per cent., is comparatively low, and complete saturation 

 is not frequent. It is of interest to note that very low humidities were met with on 

 12th and 13th March, when the "Scotia" was beset off Coats' Land. On the former 

 day the mean was only 18 per cent., and at some hours as low as 11 per cent. 



With regard to precipitation, it is, as one would expect, nearly all in the form of 

 snow ; sleet, ruin, and hail being uncommon. No definite statement can be made regard- 

 ing the quantity precipitated, but the amount is certainly very small. It is interesting 

 to note that lightning was observed on 16th March 1904 in lat. 71° 28' S. long. 

 22° 32' W. 



Cflimatic Features of the Wiiids in the Weddell Sea. 



The following table shows the mean barometric pressure, temperature, etc., experi- 

 enced with each wind direction in the Weddell Sea between the meridians of 47° and 

 11° W. Except for a few days in February 1903 the data refer to a region south of 

 60° S. The periods discussed were from 2nd February to 26th March 1903, and from 

 23rd February to 31st March 1904. 



