NO. II ATMOSPHERIC OZONE FOWLE 27 



In the southern hemispliere no such marked rclationsliip is noted, 

 although one may be masked by the small range and corresponding 

 inaccuracy in the values. The range is only from 20XIO"' to 

 50 X io~* calories. 



It is suggested — and such a suggestion is strengthened by magnetic 

 data — that we are dealing with two layers of ozone. The first is due 

 to ultra-violet light coming from the sun and hence existing over 

 all the stations. The second is assumed to be due to positively elec- 

 trified particles emitted from definitely disturbed areas of the sun. 

 This second e fleet reasonably shows a strong correlation with the 

 Wolfer sun-spot numbers. Probably because these positive particles 

 are deflected towards the earth's north pole this layer of ozone is 

 found over the northern hemisphere stations only. At sun-spot mini- 

 mum it is negligible so far as the present measurements indicate. 



All the results of the present paper are based on monthly and 

 yearlv means. A consideration of the daily values would be another 

 story. The plot published in the preliminary paper was based on 

 daily values for only two years at Table Mountain. The short study 

 then made of the daily values would indicate that what may be said 

 of the connection between many magnetic values and solar disturbances 

 may be said of ozone; that although with monthly and yearly aver- 

 ages, solar spottedness, for example, goes hand in hand with the 

 amount of ozone, yet a day of many spots may pass with no increase 

 of ozone and vice versa. 



