THE WEDDELL QUADRANT AND ADJACENT AREAS. 121 



expressed as percentages. With regard to the seasonal values, it may be pointed out 

 that Summer comprises December, January, and February ; Autumn, March, April, and 

 May ; Winter, June, July, and August ; and Spring, September, October, and November. 

 In place of the surface winds, the observed drift of the lower clouds at the South 

 Orkneys is given. The table is not wholly satisfactory, as clear weather in winter 

 usually occurs with southerly winds, so that the values for south-west, south, and south- 

 east are above, and northerly winds below, the values given for this season. With 

 regard to Dungeness, there would appear to be a local south-west wind at the Atlantic 

 entrance to the Straits of Magellan, as this wind is unusually frequent. 



Table VIII. gives an analysis of the movement of the upper clouds (cirrus, cirro- 

 cumulus, and cirro-stratus) for the months and the seasons at the South Orkneys and 

 Cape Horn region, including South Georgia. For the latter station and for the 

 "Belgica" only seasonal means are given. The mean direction of the upper clouds 

 has been obtained by the application of Lambert's formula to the annual and seasonal 

 values. The data for the South Orkneys are for the five years 1903-1907. The table 

 for the Cape Horn region is from one year's observations, 1882-83, at Orange Bay and 

 Ushuaia, and two years' observations at New Year's Island. Another table is given in 

 which South Georgia (where twenty months' observations are available) is included 

 with the above-mentioned Cape Horn data. For the " Belgica " an analysis has been 

 made of the hourly cloud observations published in extenso in M. Dobrowolski's paper.* 

 I may point out that the mean annual values given by me differ slightly from those 

 given by M. Dobrowolski on page 58 of his report, but the difference is not of any 

 moment. The cloud velocities given for the " Belgica " have also been deduced from an 

 examination of the detailed hourly observations. 



Table IX. gives mean monthly and annual sea surface temperature at four places, 

 viz. the South Orkneys, South Georgia, Orange Bay, and New Year's Island. The 

 returns from this last-named station have been extracted from the MS. daily sheets of 

 observations for the period to which they refer. 



Table X. gives an abstract by months of the observations made during summer 

 expeditions on the east coast of Graham's Land and in the Weddell and Biscoe Seas. A 

 comparative series of observations made at Staten Island for the same period as that 

 covered by Dr Bruce's 1892-93 visit to Louis Philippe Land is also included. 



Table XI. contains an abstract of observations made in the months of February and 

 March, so combined as to give means extending over a considerable number of days for 

 definite areas. 



Table XII. contains similar means for the Ross Sea, calculated from the values given 

 in "Contributions to our Knowledge of the Meteorology of the Antarctic." 



Table XIII. gives the percentage frequency and mean direction of the summer 

 winds in various parts of the Weddell Quadrant and Ross Sea. The mean direction has 

 been obtained from Lambert's formula. 



* Expedition Antarctique Beige: Resultats du Voyage du S.Y. "Belgica" en 1897-1898-1899 : " Met^orologie : 

 Observations des Nuages," par A. Dobrowolski, Anvers, 1903. 



