1898-1902. No. 4] THE TEMPERATURE OF THE AIR. 59 



PART II. 

 THE TEMPERATURE OF THE AIR. 



The thermometers sent with the Expedition had been compared 

 with the standards at the Meteorological Institute in Kristiania in the 

 spring of 1898. Only very few of them came back^. 



The thermometers used for the regular observations at the winter 

 quarters were 



1) Mercury thermometer Kilchler No. 22 (dry bulb). 



2) Mercury thermometer Kuchler No. 9 (wet bulb). 



3) Mercury thermometer Kuchler No. 10 (dry bulb). 



The comparisons of these thermometers in Kristiania in 1898 gave 

 the following corrections 



No. 22 



+ 0!03 

 + 0.02 

 0.00 

 0.0 



On the IT^ of September, 1898, No. 9 and No. 22 showed 0°0 in 

 melting snow. The journal contains the remark that both were exam- 

 ined in melting snow on the 4'i^ of October, and compared with the 

 standard on the 24"^ of October and the 2-^^ of November of the same 

 year. According to the journal, "the thermometer was corrected" on the 

 2°'i of January, 1899, and No. 9 and No. 22 "corrected" on the 27*'^ 

 of May, 1899. The results of these comparisons are not given. The 

 Expedition had an apparatus for comparing thermometers, consisting of a 

 cyhndrical vessel with a lid and an annular stirrer. The vessel could be 



• Some of the thermometers were broken on the sledge-journeys, and some on 

 board ship. The Fram rolled heavily in a sea, and by her uneasy motions 

 caused the loss of many thermometers, particularly on the return voyage. 



