470 



observations were mostly in the day, and often were taken several times in the same day. On each 

 occasion the minimum since the last visit was observed. 



The figures do not suffice to show the mean temperature in the light season, or, strictly, in the dark 

 season, though in the absence of the sun a chance visit once a day at various times should give a fairly 

 good average. 



A glance at the figures shows at once very great discrepancies between the temperatures of the two 

 places, both at sea level and not far apart, and it seems certain that the differences are not due to 

 instrumental errors or to careless observations. Differences of even 25 F. between the two places occur 

 at times, and differences of from 10 to 20" in the recorded minimum are quite common in the winter. 

 The observations during the summer are very few, and some of those there are have a note attached ' in 

 the sun,' but during the summer there does not seem to have been any striking difference. The winter 

 differences invariably give the lower temperature to Gape Armitage, and there is little doubt that the 

 mean at the ship during the dark months was quite 10 F. above the mean at Cape Armitage. 



HIGH-LEVEL TEMPERATURES. 



Some forty temperature observations were made at an elevation o'f 960 ft., about two miles to the 

 eastward of the ship, during the winter of 1902. A comparison of these values with those observed at the 

 " Discovery " is given below : 



In forming the above table, in cases where the temperature observation at the high-level station was not 

 simultaneous with that at the ship the value at the ship has been obtained by interpolation from the 

 nearest readings. 



Even allowing for the ordinary fall of temperature with height, namely, 3 F. for the 960 ft. nearly, it 

 will be seen that the temperature at the ship is much above that at the high-level station. The only 

 exception is September, but this is not of much importance, since it depends on three observations only. 



The differences are not so striking as at Cape Armitage, but they also point to a high local temperature 

 at the position of the ship. I can give no certain explanation of these differences, but can only state that 

 they do not seem to be due to any peculiarity in the weather at the times the observations were made. 

 The proper form of screen was not used at Cape Armitage or on the hill, but the thermometers seem to 

 have been at much the same height. The differences are roughly proportional to the depth of the 

 temperature below the freezing point. The only suggestion I can make is that the thermometer screen at 

 the " Discovery " was placed too near the tide crack, and that the temperatures are unduly high on account 

 of the influence of the sea water in the crack. The thermometer at Cape Armitage was quite open to the 

 sky during the winter, but I do not think this will account for the difference, provided it was about the 

 same height above the surface of the snow. 



