294 



ON THE PERIODICITY OF THE AURORA BOREALIS. 



April 25. Prague. Ballot. 



" 26. Prague. Ballot. 



" 28. Prague. Ballot. 



" 29. Prague. Ballot. 

 May 4. Toronto. Kingston. 



" 8. Toronto. Kingston. 



" 15. Toronto. Kingston. 



" 16. Toronto. Kingston. 



" 17. Toronto. Kingston. 



*June 12. Toronto. Kingston. 



" 13. Toronto. Kingston. 



" 29. Isle Jesus. Smallwood. 



July 9. Toronto. Kingston. 



" 12. Isle Jesus. Smallwood. 



" 13. Isle Jesus. Smallwood. 



" 25. Isle Jesus. Smallwood. 



*Aug. 1. Toronto. Kingston. 



* " 1. Isle Jesus. Smallwood. 

 " 2. Toronto. Kingston. 



" 8. Isle Jesus. Smallwood. 



" 11. Isle Jesus. Smallwood. 



" 13. Isle Jesus. Smallwood. 



" 14. Toronto. Kingston. 



* " 22. Toronto. Kingston. 

 Sept. 1. Isle Jesus. Smallwood. 



" 1. Christiania. Fearnley. 

 " 2. Toronto. Kingston. 

 " 4. Toronto. Kingston. 

 " 4. Isle Jesus. Smallwood. 

 " 5. Toronto. Kingston. 

 " 5. Christiania. Fearnley. 



* " 8. Isle Jesus. Smallwood. 



* " 8. Clirislkiuia. Fearnley. 

 " 10. Dorpat. Ballot 



" 11. Monster. Ballot. 



* " 15. Toronto. Kingston. 



* " 15. Isle Jesus. Smallwood. 

 " 24. Isle Jesus. Smallwood. 

 " 25. Netherlands. Ballot. 



" 30. Haparanda. Ballot. Heis. 1 

 Oct. 2. Utrecht. Heis. 



" 6. Christiania. Fearnley. 



* " 10. Toronto. Kingston. 



* " 10. Isle Jesus. Smallwood. 



* " 10. Christiania. Fearnley. Dorpat. Heis. 



* " 10. St. Petersburg, Stockholm. Ballot. Heis. 



* " 10. Utrecht, Netherlands. Ballot. Heis. 



* " 10. Sandosund. Fearnley. 



i Wochenschrift fur Astronomie etc., Neue Folge, Jahrgang 

 V. 37 &c. 



Oct. 11. Haparanda. Ballot. Heis. 

 " 13. Toronto. Kingston. 

 " 14. Toronto. Kingston. 



* " 24. Toronto. Kingston. 



* " 24. Isle Jesus. Smallwood. 



* " 25. Toronto. Kingston. 



* " 27. Toronto. Kingston. 



* " 27. Christiania. Fearnley. 



" 28. Isle Jesus. Smallwood. Haparanda. 

 " 28. Haparanda. Ballot. Heis. 

 " 31. Isle Jesus. Smallwood. 

 *Nov.7. Toronto. Kingston. Aalesund. Fearnley. 



* " 7. Ebstorf, Netherlands. Ballot. Heis. 

 " 8. Isle Jesus. Smallwood. 



" 8. Christiania. Fearnley. 

 " 12. Aalesund. Fearnley. 

 " 20. Isle Jesus. Smallwood. 

 " 23. Christiania. Fearnley. 

 " 26. Christiania. Fearnley. 

 " 30. Christiania. Fearnley. 

 *Dec. 1 ? Toronto. Kingston. Stockholm. Heis. 

 " 2. Dessau, Prague. Heis. 

 " 3. Dorpat. Ballot. 1 

 " 3 ? Stockholm, Peckeloh. Heis. 



* " 4. Toronto. Kingston. Gaesdonck. Heis. 



* " 4. Netherlands. Ballot. Carroiu. Heis. 

 " 6. Aalesund. Fearnley. 



" 7. Aalesund. Fearnley. 

 " 12. Isle Jesus. Smallwood. 

 " 14. Isle Jesus. Smallwood. 



* " 19. Stockholm, Haparanda. Ballot. Heis. 



* " 19. Aalesund. Fearnley. 



* " 19. Mandal, Sandosund. Fearnley. 

 " 20. Toronto. Kingston. 



" 20. Isle Jesus. Smallwood. 



" 20. Christiania ? Fearnley. Basle. Heis. 



" 21. Toronto. Kingston. 



" 23. Dresden. Heis. 



" 24. Dresden. Heis. 



" 26. Peckeloh. Weber. Heis. 



" 30. Aalesund. Fearnley. 



1862. 

 *Jan. 1. Toronto. Kingston. 



* " 1. Stockholm. Heis. Ballot. 



* " 2. Toronto. Kingston. 



* " 2. Isle Jesus. Smallwood. 

 " 5. Aalesund. Fearnley. 



" 6. Toronto. Kingston. 



i Nederlandsch Meteorologisch Jaarboek, 1862, pp. 296, 319. 



