8fi ME. GEOKGE C. SIMPSON ON THE 



on 



The wind strength has a most direct influence, which can not only be seen in the 

 year and separate months, but can also be detected in nearly all the individual 

 observations. 



TABLE XIX. Kadio-activity and Wind Strength. 



The radio-activity is greater with a falling than with a rising barometer. The 

 results show this every month without exception. 



TABLE XX. Radio-activity and Barometer. 



But this does not necessarily mean that the radio-activity is greater with a low 

 than with a high barometer. Table XXI. shows that such is not the case. Out of 

 the six separate periods only two, April and May and June, show a regular increase in 

 the radio-activity as the height of the barometer decreases. In the other months, and 

 for the year considered as a whole, no relation appears between the radio-activity and 

 the height of the barometer. 



TABLE XXI, Radio-activity and Height of the Barometer. 



