McClklland and KiiiNNEDY — The Large Ions in the Atmosfhere. 81 



Nov. I, Kill 



., 8 



» 'J 



,. 9 



„ 10 



„• 15 



„ 20 



,, 27 



„ 29 



„ 29 



,, 30 



,, 30 



Dee. 2 



>, 4 



,, 6 



>> S 



„ 13 



„ 20 



„ 21 



7,000 



5,000 



11,000 



8,900 



30,000 



15,000 



15,000 

 7,000 

 16,000 

 16,000 

 33,000 

 14,000 

 28,000 

 15,000 

 19,000 

 12,000 

 16,000 

 16,000 

 10,000 

 15,000 

 18,000 



48 

 U7 



AA''eut)iei' di 



Average for jVoii a rainy day. n inilially was 147, 

 then diminished and remained steady for a ton- 

 siderable time about 26. 



Average of A' and n for a rainy dav. " varied from 

 23 to 70. 



At 11 a.m. thick "smoke fog." Later N varied 

 from 19,000 to 8,000 as the atmosphere became 

 clearer on afternoon of same day. 



After interval of aboiit two hours. 



Jan. 1, 1912 



to 

 Jan. 12, 1912 



17,000 



ID 



10,000 



- 



J Limits of 25 observations taken during this interval. 



„ 22 



22,000 



— 



Dense fog previous night ; light fog during morning. 



,, 25 



19,000 



- 



- 



„ 28 



10,000 



— 



- 



„ 29 



9,000 



— 



- 



., 31 



15,000 



— 



— 



I'eb. 1 



15,000 



— 



At 10.30. Snowstorm at 12 noon during which 



.. 1 



55,000 



— 



iV^rose to 55,000. 



,. 1 



54,000 



- 



In the evening during another shower 54,000 waj 



1 



18,000 



— 



obtained, falling to 18,000 when snow ceased. 



2 



10,000 



— 



Snow on ground. Dry and frosty. 



,, 23 



53,000 



- 



A very dense " mist " fog about 9 p.m. 



[13-] 



