and Nature of the Cosmic Electric Buys. 53 



these the position of the radiation point could be accurately 

 measured. 



In Table V. are given the results obtained from these photo- 

 graphs. In the next two columns are given the coordinates 

 of the magnetic zenith actually existing at the moment of 

 observation. 



A is the angular distance between the R. Point and the 

 Magnetic Z. 



Number 

 of Plate. 



9 

 10 



11 



Date. 



24/3 

 26/11 



Table V. 



Radiation Point. 



Hour. 



h m s 

 12 19 17 



10 58 8 



10 58 27 



10 58 47 



10 59 52 



11 5 

 11 19 

 11 34 

 11 3 43 

 11 15 33 

 11 15 45 



75-52 

 75-00 

 75*45 

 75-30 

 75-75 

 75-36 

 75-44 

 75-00 

 75-45 

 75-55 

 75-65 



a. 



o 

 -642 



-2-15 



-2-30 



-1-75 



-2-60 



-1-85 



-2-30 



-2-70 



-2-40 



-1-95 



-2-70 



Magnetic Zenith. 

 h. a. 



76-60 



76-63 



76-68 

 76-73 



o 

 -2-13 



•2-53 



76-65 -2-62 



2-83 

 ■2-47 



1-50 

 1-63 

 1-18 

 1-35 

 0-90 

 1-31 

 121 

 1-65 

 1-24 

 1-19 

 1-08 



Mean for 26/11/14 75-40 



Mean Total 75"41 



-2-65 



76-67 

 76-66 



2-61 

 2-52 



1-27 

 1-24 



In Table VI. is given the mean position of the auroral 

 zenith (radiation point) and the magnetic zenith tor a 

 number of arctic stations. . 



Table YI 



Auroral Zenith. 

 h. a. 



,, ,. n -,, Distance 

 Magnetic Zenith. ^^ 



" » "*" "^ the 



h - a - Zeniths. 



No. 



Stations. 



Bossekop 1839-40 76" 1 



JauMayen 1882 78" 1 



Kingua Fjord 1882 833 



Nain 1882 79'6 



Cap Thordsen 1882 79'92 



Bay Treurenb. 1899-1902... 80-82 

 Halddel914 75'41 



We see that the auroral and magnetic zeniths nearly 

 coincide, but they show some small differences with regard 



o 



■ 7-73 



•36-2 

 • 70-4 

 ■36-6 



■ 7-2 



- 8-15 



- 2-65 



76-33 



79-03 



835 



80-0 



80-58 



8133 



76-66 



-10-77 



-29-9 



-73-5 



-44-0 



-12-75 



-10-55 



o-s 



1-5 

 0-4 

 1-3 

 1-1 

 0-8 

 L-3 



43 

 29 

 6 

 38 

 11 

 36 

 11 



