ATMOSPHERIC ELECTRICITY IN HIGH LATITUDES. 



77 



TABLE X. Dissipation and Wind. 



Dissipation and Relative Humidity. GOCKEL* has gone very fully into the 

 relation between dissipation and relative humidity, and his results, which have in the 

 main been confirmed by ZoLSS,t show that the dissipation decreases with a rise in 

 the relative humidity, and as the dissipation of the positive electricity decreases 

 more rapidly than that of the negative, the ratio q increases as the relative humidity 

 rises. 



TABLE XI. Dissipation and Relative Humidity. 



Table XI. shows that for relative humidities greater than 50 per cent, my results 

 agree with GOCKEL'S, the decrease in the dissipation as the relative humidity rises 

 being very marked, and the value of q also increases as the relative humidity 

 increases. But it should be remarked that the fall in the dissipation as the relative 

 humidity rises is not entirely due to the relative humidity, for the conditions in 

 Karasjok were such that nearly all values of the relative humidity higher than 

 80 per cent, were accompanied by a calm atmosphere, and in the main low values 

 of the relative humidity were accompanied by high wind. 



Dissipation and Temperature. ZOLSS (loc. cit.) has shown that the dissipation in 

 the free air increases with the temperature, and he found that the variation was linear 



* 'Phys. Zeit.,'4, p. 871, 1903. 

 t 'Phys. Zeit.,' 5, p. 108, 1904. 



