RECORD AND DISCUSSION OF TEMPERATURES. 



TEMPERATURE OF THE Am IN SIIADE OBSERVED AT VAN RENSSELAEK HARBOK, 



In September, 1853, iu Lat. 78 31 , Long. 70 53 W. of Greenwich. 

 Expressed in degrees of Fahrenheit s scale. On deck the brig Advance and at meteorological observatory on floe. 1 



1 The observations upon the floe commence Sept. 28th. From Aug. 18th to Sept. 27th, inclusive, mercurial thermometer No. 6 was used ; 

 ts scale correction, determined by two standards, is, 0.2 and 0.7 (at +39), mean 0.4. On and after Sept. 27th, the spirit standard 

 &amp;gt; was used. A second correction has been applied, to refer the temperatures on deck to the temperatures on floe, viz: at +30 and +15 

 tone, at +10, +0.3, and at + 5 and 0, +0.4; deduced from 27 comparisons. 



* Value deduced from temperature 80 feet above deck. 



NOTE. The mean temperature of the air given in Appendix No. XII. of the narrative, refers to days of nautical reckoning, commencing 

 nd ending with noon ; on and after September 11, 1853, civil reckoning was adopted. 



