514 



H. MOHN. METEOROLOGY. 



[nORVV. POL. EXP. 



An inquiry into the question as to whether there is a difference between 

 the diurnal period of the amount of cloud with weak winds and that with strong 

 winds, has led to the following results. The days with a wind-velocity less 

 or more than 4'5 metres per second are tiie same as in the similar tables 

 already given (pp. 299 and 478) for the diurnal period of the velocity of the 

 wind and that of the temperature of the air. 



