THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 



263 



It is evident that in order to explain the characteristic features of the curves of 

 barometric range in clear and cloudy weather, it will be necessary to prepare similar 

 curves of temperature for the selected days, and this we hope to do in a future paper, 

 utilising the data that will be available for the South Orkney station down to the end 

 of the present year (1907). In this way the inter-relations existing between the two 

 elements with possibly that of humidity will be rendered apparent.* 



Temperature. 



The thermometers were exposed duinng the wintering of the " Scotia " in single 

 louvred screens, but at the shore station Stevenson's screens were employed. 



The highest temperature recorded during the year ending 31st March 1904 was 

 47°-5 on 11th February 1904, and the lowe.st -26''0 on 19th June 1903, showing a 

 range of 73"'5. The coldest month was June, with a mean temperature of 9°'5, and the 

 warmest, February, with a mean of 32°-6. The mean annual temperature was 23°'4. In 

 the following table will be found the mean monthly temperature for the two years 1903 

 and 1904, the values for the first three months of 1903 being interpolated by assuming 

 that the temperature of these months, as compared with the corresponding months of 

 1904, differed to the same extent at the South Orkneys as at the Falklands. Thus at 

 Cape Pembroke, January, February, and March 1903 were colder than the corresponding 

 months of 1904, to the extent of 1°"9, 2°'3, and 2°-2 respectively ; and on this assumption 

 the mean temperature of the South Orkneys was as follows, viz., January 30°'4, February 

 30° "4, and March 30° 'S. These values are not likely to differ much from the truth. 

 The "Scotia," for example, in her cruise to the east, from 1st to 14th February 1903. 

 when in a mean latitude of 60° 04' S. long. 37° 43' W., had a mean of 30°"3, the ship's 

 position being thus some 40 miles north of the latitude of the Orkneys. The values 

 after February 1904 have been obtained from the observations taken by the Argentine 

 Expedition to the South Orkneys.t 



1903 

 1904 



Mean 



Deo. i Year. 



31-5 

 28-8 



30-2 



22-9 

 22-4 



22-7 



VOL. II. 



■*■ See note, page 283. 



+ Anales de la Oficina Meteorologica Argentina, by Walter G. Davis, tome xvi., p. 48. 



36 



