168 



H. MOHN. METEOROLOGY. [2nd. ARC. EXP. FRAM 



FORCE OF VAPOUR. DAILY PERIOD. 



Putting together the numbers for the force of vapour in the last 

 row of the foregoing Tables, we obtain the following Tables, showing 

 the means of the force of vapour for every alternate hour in the several 

 years. To the right, are the daily means of these, headed Mean, and 

 the number of days of observation, headed Days. 



January. 



February. 



March. 



1899 



1900 

 I90I 

 1902 



0.68 



0.67 



0.52 



0.44 



0.68 



0.64 



0.51 

 0.44 



0.71 



0.66 

 0.52 

 0.48 



0.72 

 0.70 



0-53 

 0.51 



0.74 

 0.78 

 0.56 

 0-55 



0.77 

 0.83 

 0.60 

 0.60 



April. 



0.74 

 0.86 

 0.63 

 0.65 



0-73 

 0.89 

 0.61 

 0.6.S 



0.77 

 0.86 



0-59 

 0.60 



0.74 

 0.80 

 0.60 



0-73 

 0.79 



0-57 

 0-54 



0.67 



0-73 

 0.56 



0-53 



0.72 

 0.77 

 0-57 

 0-55 



30 

 30 

 30 

 30 



Mea 



0.58 



0-57 



0-59 



0.62 



0.66 



0.70 



0.72 



0.72 



0.71 



0.68 



0.66 



0.62 



0.65 



May. 



