54 



ON THE PERIODICITY OF THE AURORA BOREAEIS. 



Jan. 13. 



" 15. 



" 16. 



" 19. 



" 19. 



" 20. 



" 21. 



" 22. 



" 29. 



Feb. 10. 



" 12. 



" 16. 



" 17. 



" 18. 

 Mar. 4. 



8. 

 •• 10. 

 " 11. 

 " 1 2. 

 " 13. 

 " 16. 

 " 17. 

 " 18. 

 " 27. 

 May 17. 

 « 24. 

 « 28. 

 July 27. 

 Aug. 1. 

 " 11. 

 « 12. 

 " 13. 

 " 15. 

 Sept. 3. 

 8. 



" 27. 



Oct. 2. 



3. 



" 5. 



" 6. 



" 7. 



" 12. 



" 12. 



" 13. 



'• 14. 



Lovering. 



Upsal. Ferner. 1 

 Upsal. Ferner. 

 Upsal. Ferner. 

 Cambridge. Winthrop. 

 Upsal. Ferner. 

 Upsal. Ferner. 

 Upsal. Ferner. 

 Upsal. Ferner. 

 Steinebrunn. Bischoff. 

 Upsal. Ferner. 

 Ferner. 

 FerneTr. 

 Ferner. 

 Ferner. 

 Ferner. 

 Ferner. 



Ferner. Tubingen 

 Gotlingen. Hollmann. 

 Upsal. Ferner. 

 Ferner. 

 Ferner. 

 Ferner. 

 Ferner. 

 Ferner. 

 Ferner. 

 Ferner. 

 Steinebrunn. Bischoff. 

 Tubingen. Kraft. 



Volzius. 2 

 Kraft. 

 Kraft. 

 Kraft. 

 Kraft. 

 Kraft. 



Volzius. Steinebrunn. Bischoff. 

 Kraft. 

 Ferner. 

 Ferner. 

 Ferner. 

 Ferner, 

 Ferner. 

 Gottingen. Hollmann. 

 Upsal. Ferner. Gottingen. 

 Upsal. Ferner. 



Cambridge. "Winthrop. Lovering, 

 Gottingen. Hollmann. 

 Upsal. Ferner. 



Upsal. 

 Upsal. 

 Upsal. 

 Upsal. 

 Upsal. 

 Upsal. 

 Upsal. 



Upsal. 



Ipsal. 

 Upsal. 

 I psal. 

 Upsal. 

 Upsal. 

 I r psal. 



Stuttgart. 



Tubingen. 



Tubingen. 



Tubingen. 



Tubingen. 



Tubingen. 



Stuttgart. 



Tubingen. 



I psal. 



Upsal. 



I psal. 



Upsal. 



I psal. 



Kraft. 



Tubingen. Kraft. 



Tubingen. Kraft. 



Gottingen. Hollman. 



Hollmann. 



i Svenska Vetensk. Acad. XVI. 290. 

 2 N. Comm. Petrop. V. 410. 



1 Svenska Vetensk. Acad. XVI. 290. 



2 The Gregorian Calendar was adopted in Sweden in 1753, 

 the 17th of February being followed by the 1st of March. 

 Therefore the dates commencing with March 1st are published 

 here as given by Ferner. All the previous dates were reduced 

 from old style to new style. 



