266 RESULTS OF THE METEOROLOGICAL OBSERVATIONS TAKEN DURING 



In the Autumn and Winter of 1904 the diurnal period is much more clearly defined 

 than in the year under review, but even here there is a well-marked secondary maxi- 

 mum and minimum in the Winter season. Indeed, during the Winter, except on very 

 clear days, the solar effect is very feeble, and great and rapid changes of temperature 

 may take place at any time. This disturbing effect was much more pronounceil in 1903 

 than in 1904, owing to the frequency of rapidly moving V-shaped depressions which 

 caused great temperature variations, as the trough of the disturbance moved over the 

 station. Eeference to the notes in the meteorological log will show the frequency with 

 which great changes of temperature occurred without reference to the hour of the day. 



Mean Air Temperature. 



20- (i 

 17-3 

 10-0 

 lC-8 

 19-1 

 12-2 

 25'5 

 28-1 

 30-4 



20-8 

 17-5 

 10-4 

 17-9 

 19-1 

 12-0 

 25-2 

 28-1 

 30-3 



21-0 

 17-8 

 10-1 

 18-3 

 19-2 

 11-8 

 26-2 

 28-2 

 30-4 



32-0 32-0 ' 32-1 

 32-0 320 32-0 



230 



23-1 23-2 



20-6 

 17-8 

 98 

 18-5 

 19-1 

 11-6 

 25-8 

 28-4 

 30-6 



32-1 

 32-0 

 32-6 



20-3 

 17-9 

 9-8 

 18-9 

 18-6 

 11-9 

 26-9 

 28-7 

 30-9 



32-0 

 32-1 

 32-4 



23-3 



20-6 

 17-8 

 9-1 

 189 

 18-2 

 12-4 

 26-2 

 29-0 

 31-4 



32 1 

 32-2 

 32-3 



23-3 



20-5 

 17-3 

 9-2 

 lS-4 

 18-0 

 13-2 

 26-8 

 29-2 

 31-7 



20-7 

 17-4 

 87 

 18-5 

 17-9 

 13-7 

 27-4 

 29-6 

 320 



32-4 I 32-6 

 32-6 I 32-7 

 32-5 32-6 



23-6 23-6 



21-1 

 17-0 

 8-5 

 18-9 

 18-3 

 13-9 

 27-8 

 HOI 

 321 



21-2 

 17-2 

 9-3 

 18-S 

 18-9 

 14-2 

 28-() 

 30-3 

 32-4 



Noon, 



32-8 I 33-1 

 32-9 33-1 

 32-6 32-7 



23-8 24-1 



21-2 

 17-3 

 9-4 

 18-2 

 19-1 

 14-7 

 28-1 

 3li-5 

 32-9 



33-2 

 33-1 

 32-8 



21-2 

 17-0 

 9-5 

 17-9 

 19-3 

 15-3 

 28-3 

 30-7 

 32-9 



21-2 

 16-8 

 91 

 17-0 

 19-0 

 15-6 

 28-6 

 30-4 

 32-8 



, 33-2 330 

 33-1 I 33-2 

 : 32-8 32-9 



24-2 i24-3 24-1 24-0 



21-1 

 16'1 

 9-1 

 16-1 

 18-9 

 15-6 

 28-3 

 30-5 

 32-5 



33'0 

 33-5 

 33-0 



11 ildt. Mean. 



19-6 

 16-3 

 9-8 

 15-3 

 17-6 

 13-3 

 27-2 

 29-5 

 31 .=i 



19-7 

 164 

 9-9 

 15-3 

 17-7 

 13-2 

 20-9 

 29-4 

 31-4 



20-1 

 16-8 

 9-9 

 15-4 

 lS-1 

 130 

 26-8 I 

 29-3 

 31-2 



20-4 

 17-4 

 9-6 

 15-1 

 18-1 

 12-8 

 2fi-6 

 29-0 

 30-8 



32-2 I 31-9 I 31-6 31-4 

 32-6 32-6 I 32-8 32-6 

 32-3 , 32-1 ' 31-9 I 32-1 



i-1 23-0 23-1 23-0 22-9 ; 23-0 



20-2 

 17-4 

 8-9 

 16-2 

 18-6 

 13-1 

 26-7 

 28-4 

 30-9 



31-5 

 32-5 

 31-8 



20-4 

 17-6 

 9 3 

 15-3 

 19-0 

 131 

 26-6 



31-3 

 32-3 

 31-8 



20-6 

 17-1 

 96 

 16-9 

 18-6 

 13-4 

 27-0 

 29-3 

 31-5 



32-7 

 32-4 



Wl.NDS. 



The following table shows the number of times the wind lilew from the eio;ht 

 principal directions along with calms and variables. During the time that the "Scotia" 

 was in winter quarters, from April to October 1903, the exposure for most winds was 

 good, but from 1st November, when the observations were transferred to Omond 

 House, high ground immediately to the west deflected winds from that quarter into 

 south-east. The values given from November 1903 to March 1904 have accordingly 

 been corrected by taking the direction from which the lower clouds were moving when 

 these could be observed. North-west winds, owing to both stations being very open to 

 this direction, are probably somewhat in excess of the true amount, while those from 

 west and south-west are below what would have been recorded had the exposure been 

 unexceptional. While weight must be given to these matters, the main facts are clearly 

 emphasised, viz., that at no season do the South Orkneys come within the influence of 

 the east wind system which is so conspicuous a feature of the atmospheric circula- 

 tion at Snow Hill (kit. 64° 22' S. long. 57° 00' W.), Wandel Island (lat. 65° 03' S. 

 long. 63° 26' W.), and at the winter quarters of the "Gauss" (lat. 66° 02' S. long. 

 89° 38' K). 



