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H. MOHN. METEOROLOGY. 



[NORW. POL. EXP. 



Professor NANSEN'S observations at the winter-hut may, I believe, be of 

 service in furnishing data for the climatology of Franz Joseph's Land. The 

 observations certainly lack the regularity of a normal meteorological station, 

 and as we have seen, there have been some difficulties about the determina- 

 tion of the errors of the instruments; but the observations have been faith- 

 fully made and on a spot of the earth not previously visited by man for 

 any length of time. I have therefore thought it well worth while to work 

 out the following climatological Table. 



The mean pressure for each day was computed as the mean of the 

 daily observations. The amount of cloud, and velocity of the wind for each 

 month are the direct means of the observations in the Table above. 



The temperature-observations of the Table were plotted on ruled paper, 

 and a curve drawn through the points, regard being taken to the noted 

 minimum-temperatures and the most probable daily course of the temperature. 

 From this curve the temperature was taken out for every day at 2 a. m., 8 a. m., 

 2 p. m. and 8 p. m. and from them the monthly mean was computed as their 

 direct mean. 



The frequency of the winds from the 8 points, and of Calms, is given 

 as a percentage of the total number of wind-observations in each month. 



NANSEN'S WINTER-HUT - FRANZ JOSEPH'S LAND. 

 Lat. 81 13' N. Long. 55 20' E. Height 78 metres. 



