ANTARCTIC CLIMATE. 37 
and 2°9° lower in February (the night means cannot be calculated 
satisfactorily for December). 
The following table shows the maximum and minimum readings 
in each month and for the whole period: 
Maximum. Minimum. Range. 
1892, 
December 16-31 .. | 37°1°, noon on 16th 24°6°, 1.30 a.m. on 6th 12°5° 
1893. 
January 1-31. | 37°3°, 2 p.m. on 15th { 27°7°, 8 p.m. and midnight \ 96° 
on 30th 
February 1-18 .. | 36:2°,4p.m.on 7th | 20°8°, noon on 17th 15-4° 
Hence the extreme temperatures recorded were—maximum 37°3° 
and minimum 20°8°, giving a range of 16°5° F. 
As with temperature observations, pressure observations were 
made every two hours, as far as was possible, and have been grouped 
in twelve columns for each day. The mean of these has been calcu- 
lated for every month, and the whole period mean has been obtained. 
The mean pressure for the last two weeks of December was 29°357 
inches; for January, 29°273 inches; and for first eighteen days of 
February, 29°160 inches. There is thus a falling off in pressure 
from December to February, the mean for the whole period, Decem- 
ber 16 to February 18, being 29°263 inches, or about half an inch 
lower than for the corresponding season in the Farée Islands, All 
the means attain a maximum at 10 am. and 6 p.m., and all, except 
those for February, at midnight also. There seems to be a minimum 
period during the early morning-hours. On the whole the pressure 
appears to be greater in the afternoon than in the forenoon; but the 
forenoon data are insufficient for obtaining reliable results. 
The following table shows the maximum and minimum readings 
in each month and for the whole period: 
Maximum. Minimum. Range. 
1892. Inches. Tnoches. 
December 16-31 .. | 29°834, 6 a.m. on 16th 28°801, 8 a.m. on 20th 1-033 in. 
1893. 
January 1-31..  .. | 29°753, 4 p.m. on 2nd 28°745, 10 p.m. on 20th | 1°008 in. 
February 1-18 .. | 29°750, 4 p.m. on 6th 28° 850 0-896 in. 
Hence the extreme pressures recorded were—maximum 29°834 
inches, and minimum 28-745 inches, giving a range of 1°089 inch. 
