THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 



277 



have been resolved to eight points by halving the intermediate points between the 

 octants. The more correct method would have been to have divided the intermediate 

 observations with reference to the relative frequency of the adjacent octants, but this, 

 while adding considerably to the labour, would not have materially modified the 

 results. 



The number of observations employed in obtaining the means of the climatic 

 elements with the different winds, will be found in the table of wind frequency already 

 given, the variable winds which form but a very small percentage of the whole being 

 excluded. 



It, may be remarked that in the last line, giving means for the period under review, 

 the values are not the mean of the seven monthly values, each of which is dependent on 

 a different number of observations, but are derived by taking the gross totals and 

 dividing by the whole number of observations. 



In connection with the thermal and other windroses for the South Orkneys, it is 

 of interest to note that in 1906 an electrical recording anemograph was established 

 on a prominent position on Mossman Peninsula, whereby the true wind direction has 

 been continuously recorded. 



Mean Temperature of the Diffkhent Winds. 



Hence the warmest winds are NW. and N., and the coldest S. and 8E., there 

 being a difference of 21'' 7 between the warmest and coldest directions. It is of 

 interest to note the great difference between the temperature of west and south-west 

 winds. On the mean of the seven months the south-west is 16° "5 colder than the 

 west, while in June the difference was as much as 22° "2. From these observations it 

 appears probable that there is a mass of land the northern extremity of which is in 

 lat. 65° S. long. 44° W., both Morrell and Ross having referred to an "appearance 

 of land" in this region. The circumstance that " Fohn " winds blow from the west 

 doubtless partly accounts for their relatively high temperature; but there are other 

 reasons, notably the comparatively high barometric pressure experienced with south- 



