232 



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



By plotting the means, we find a regular daily period, with a maxi- 

 mum in the night and a minimum some hours after noon, only from April 

 to July. The means for the seasons (Dec. — Febr., etc.) and for the 

 year are 



The numbers for the year give a regular period. The smoothed 

 numbers give a maximum at 3 a. m. and a minimum at 3 p. ni.; 

 range 11.1—10.0 = 1.1. 



