The observations of solar radiation were made on Hut Point, near the position occupied by the sunshine 

 recorder. Both black-bulb and bright-bulb thermometers in r<t?n<> were used, and were arranged 

 hori/onully upon n stand 3i feet above the snow with their bulbs pointing to the north. Thermometers 

 with large and small vanuim bulbs were employed, but, unless otherwise stated, the readings given are 

 always those from the instruments having the larger bulbs. 



The daily amount of evaporation was obtained by weighing a small tin vessel containing ice, which was 

 kept exposed upon the top of one of the thermometer screens. Generally two, and occasionally three, such 

 vessels were weighed at each observation. 



The amount of precipitation was got from a rain gauge placed on the ice near the thermometer screens. 

 It was measured only when the snow fell without much wind; at other times the drift made it impossible 

 to use either the rain gauge or the indications of the snow gauges, which were graduated stakes placed 

 upright in the snow. 



Remarks and Notes. The observations given in the columns have occasionally been amplified by notes, 

 and they have also IHJCU supplemented by descriptions of phenomena which it was not possible to tabulate. 

 The following observations made at more or less irregular intervals as occasion offered are always entered 

 .in these notes : 



(A) The direction of drift of smoke from Mount Erebus as observed from a point a short distance to the 



westward of the " Discover}-." The bearings have been corrected for variation and are therefore 

 true. 



(B) The temperature of the air observed off Cape Armitage at times other than those specified in the 



table. 



(c) The temperature of the air at the High-Level Station on the summit of Crater Hill, to the eastward 

 of the ship and 1000 feet above sea-level. The thermometer used was a spirit minimum 

 thermometer, which was placed in a ventilated box protected by stones placed against it. 



(D) Observations of the amount of ozone present in the atmosphere, determined by the amount of 

 discoloration of a strip of prepared paper exposed to the action of a current of air. The amount 

 of discoloration was estimated by a scale of 11 points, in which "0" indicated complete absence 

 of ozone and " 10" the presence of the maximum amount. 



All compass bearings given in the notes relating to observations made at Winter Quarters have been 

 corrected for variation and are therefore true. 



