584 



H. MOHN. METEOROLOGY. 



[nORW. POL. EXP. 



The most frequent track of the barometrical depressions is towards East, 

 both in winter and in summer. The least frequent tracks are SW and NW. 

 The "Lows" may travel in all directions. 



Depressions in which the barometer rises and falls more than 10 milli- 

 metres are much more frequent in winter than in summer. The proportion 

 is as 53 to 20, or as 2-6 to 1. 



Reducing, by Lambert's formula, the numbers in the foregoing Table to 

 the four cardinal points, we obtain the following components: 



The preponderance of the easterly motions is clearly shown by these 

 numbers. 



