61 



rents only from October 1882. On 4 other plates are laid 

 out the simultaneous observations in Sodankylä and Kul- 

 tala during the intervall from 1 of Februar to 15 of March 

 1884 or 4 days of 24 hours with observations every 5th 

 minute. This four plates contain also the variations of the 

 electrical current from the atmosphere. Besides these pla- 

 tes a diagram showing the daily and hourly variations of 

 the earth-current and the atmospheric electricity is given 

 and four coloured plates showing singular luminous pheno- 

 mena, among them three auroral beams, produced on moun- 

 tain tops by means of the „point-apparatus". 



The first two volumes of this work containing 

 / Observations météorologiques, 



Il Magnétisme terrestre. 

 were published before 1887. 



As the results which can be drawn from the two first 

 volumes depend on a camparison with observations from 

 the other stations, simultaneously in activity, and this work 

 is but partly done, we will limit the present paper to these 

 results which are produced from the above mentioned trea- 

 tises in vol. III. 



The general results have been published in a provi- 

 sional manner but as the long series of observations, on 

 which they are founded, have not been accessible till now, 

 it seems convenient to take up the matter anew because 

 the earlier conclusions will now receive their deiinite form. 



