ON THE PERIODICITY OF THE AURORA BOREALIS. 



297 



1 Nederlandsch Meteorologisch Jaarboek, 1864, pp. 276, 300. 



vol. x. 38 



Feb. 



1. Insel Oesel. 



5. Peckeloh. 



6. Peckeloh. 

 9. Aalesund. 



12. Aalesund. 



13. 



14. 



17. 



28. 



1. 



5. 



8. 



9. 

 10. 

 10. 

 11. 



Dec. 10. Athens. Schmidt. Insel Oesel. Sass. neis. 

 " 11. Chrisliania. Fearnley. Athens. Schmidt. 

 " 12. Ghristiania. Fearnley. [Heis. 



" 12. Aalesund. Fearnley. 



1804. 

 Jan. 1. Insel Oesel. Sass. Heis. 

 Weber. Heis. 

 Weber. Heis. 

 Fearnley. 

 Fearnley. 

 Ghristiania. Fearnley. 1 

 Peckeloh. Weber. Heis. 

 Peckeloh. Weber. Heis. 

 Ghristiania. Fearnley. 

 Toronto Kingston. 

 Ghristiania, Skudesnes. Fearnley. 

 Toronto. Kingston. 

 Toronto. Kingston. 

 Toronto. Kingston. 

 Ghristiania. Fearnley. 

 Aalesund. Fearnley. 

 " 28. Aalesund. Fearnley. 

 " 29. Chrisliania. Fearnley. 

 March 5. Aalesund, Ghristiania. Fearnley. 

 " 6. Toronto. Kingston. Aalesund. Fearnley. 

 Peckeloh. Weber. Heis. 

 Toronto. Kingston. 



Lichtenberg. Heis. Aalesund. Fearnley. 

 Naugard. Klopsch. Lichtenberg. Heis. 

 Peckeloh. Weber. 

 10. Aalesund. Fearnley. 

 14. Hanover. Heis 

 27. Insel Oesel. Sass. 

 Aalesund. Fearnley. 

 Aalesund, Skudesnes. Fearnley. 

 Christiania. Fearnley. 

 Ghristiania. Fearnley. 

 April 1. Sitka. Kiimtz. 

 " 2. Ghristiania. Fearnley. 

 " 4. Aalesund, Christiania. Fearnley. 

 " 5. Munster. Heis. 

 " 6. Chrisliania. Fearnley. 

 " 7. Ghristiania. Fearnley. Toronto. Kingston. 

 " 24. Toronto. Kingston. 

 " 25. Sitka. . Kamtz. 

 " 27. Toronto. Kingston. 



" 27. Ghristiania. 'Fearnley. Munster. Heis. 

 " 27. Peckeloh. Weber. Naugard. Heis. 

 " 29. Toronto. Kingston. 



1 Meteorologiske Iagttagelser paa Christiania Observatorium. 



6. 



7. 



9. 

 10. 

 10. 



29. 

 30. 

 30. 

 31. 



Heis. 

 Munster. Heis. 



Heis. 



