142 



ON THE PERIODICITY OF THE AURORA BOREALI9. 



Apr. 1 6. 



" 16. 



" 16. 



" 16. 



" 18. 



" 19. 



" 22. 



" 24. 



« 25. 



May 3. 



" 3. 



« 4. 



" 4. 



" 10. 



« 11. 



" 12. 



" 13. 



" 13. 



" 14. 



" 17. 



« 18. 



« 18. 



« 19. 



" 19. 



" 21. 



" 23. 



" 23. 



« 30. 



" 31. 

 June 8. 



" 10. 



" 14. 



" 14. 



July 12. 



« 15. 



" 20. 



« 24. 



" 25. 



« 27. 



" 31. 

 Aug. 2. 



" 6. 



" 10. 



" 11. 



" 11. 



" 12. 



" 13. 



" 14. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Looniis. 



New York. Hough. Providence. Caswell. 



Christiania. Hansteen. Makerstoun. Broun. 



Toronto. Sabine. 



Toronto. Sabine. 



Christiania. Hansteen. 



New York. Hough. 



New York. Hough. 



New York. Hough. 



New Haven ? Herrick. Newton and Loomis. 1 



Cambridge. Bond. Lovering. 



New York. Hough. Christiania. Hansteen. 



New Haven ? Herrick. Newton and Loomis. 



Toronto. Sabine. 



Neio Haven. Herrick. Newton and Loomis. 



Hough. 

 Herrick. Newton and Loomis. 



Hough. 



Hough. 



Hough. 



Herrick. Newton and Loomis. 

 Herrick. Newton and Loomis. 



Hough. Providence. Caswell. 



Hough. 



Hough. 



New York. 



New Haven. 



New York. 



New York. 



New York. 



New Haven. 



New Haven. 



New York. 



New York. 



New York. 



Toronto. Sabine. 



New York. Hough. 



Toronto. Sabine. 



At Sea. Lyell. Hough. 



New York. Hough. 



New Haven. Herrick. Newton and Loomis. 



New York. Hough. 



Cambridge. Bond. Lovering. 



New Haven ? Herrick. Newton and Loomis. 



New York. Hough. 



Toronto. Sabine. 



New Haven ? Herrick. Newton and Loomis. 



New York. Hough. 



Hough. 



Hough. 



Hough. 



Hough. 



Bond. Lovering. 

 Herrick. Newton and Loomis. 

 Herrick. Newton and Loomis. 



New York. 



New York. 



New York. 



New York. 



Cambridge. 



New Haven. 



New Haven. 



Toronto. Sabine. 



New York. Hough. 



l Bull, de l'Acad. Brux. XIV. Pt. I. p. 420. 



Aug. 15. 



" 16. 



" 18. 



" 21. 



" 22. 



" 24. 



" 24. 



" 24. 



" 24. 



" 25. 



" 27. 



" 27. 



" 28. 



" 28. 



" 29. 



" 29. 



" 29. 



" 30. 



" 31. 



Sept. 1. 



9. 



" 10. 



" 10. 



" 10. 



" 11. 



" 11. 



" 11. 



" 11. 



" 12. 



" 13. 



" 14. 



" 16. 



" 17. 



" 19. 



" 20. 



" 21. 



" 21. 



" 21. 



" 21. 



" 21. 



" 21. 



" 21. 



" 22. 



" 22. 



' 22. 



' 22. 



' 22. 



New York. Hough. Repidse Bay. Rae. 

 Toronto. Sabine. 



New Haven? Herrick. Newton and Loomis. 

 Christiania. Hansteen. 

 Hansteen. 

 Bond. Lovering. 

 Herrick. Newton and Loomis. 

 Hough. Providence. Caswell. 

 Hansteen. Makerstoun. Broun. 



Christiania. 



Cambridge. 



New Haven. 



New York. 



Christiania. 



Christiania. Hansteen. 



Comrie, Perthshire. M'Farlane. 1 



Christiania. Hansteen. Makerstoun. Broun. 



Bonn. Schmidt. Christiania. Hansteen. 



Toronto. Sabine. 



New Haven ? Herrick. Newton and Loomis. 



Pidgejield, Conn. Bradley. 



Christiania. Hansteen. 



New Haven ? Herrick. Newton and Loomis. 



Christiania. Hansteen. 



New York. Hough. Christiania. Hansteen. 



New York. Hough. 



Cambridge. Bond. Lovering. 



New York. Hough. Makerstoun. Broun. 



Christiania. Hansteen. 



Cambridge. Bond. Lovering. 



New York. Hough. Toronto. Sabine. 



Christiania. Hansteen. 



Makerstoun. Broun. Jakobshavn. Rudolph. 



Toronto. Sabine. Christiania. Hansteen. 



Toronto. Sabine. Christiania. Hansteen. 



Toronto. Sabine. Christiania. Hansteen. 



Jakobshavn. Rudolph. 



Christiania. Hansteen. 



Christiania. Hansteen. 



Christiania. Hansteen. 



Ashfeld, Mass. Herrick. Newton and Loomis. 



New Haven. Herrick. Newton and Loomis. 



New York. Hough. 



Providence. Caswell. Toronto. Sabine. 



Durham. Chevallier. Norwich. Marshall. 2 



Christiania. Hansteen. Comrie. M'Farlane. 



Makerstoun. Broun. 



Cambridge. Bond. Lovering. 



Ashjie/d, Mass. Herrick. Newton and Loomis. 



New Haven. Herrick. Newton and Loomis. 



Repulse Bay. Rae. 8 Toronto. Sabine. 



New York. Hough. Christiania. Hansteen. 



1 Athenaeum, 1846, p. 917. 



2 Proc. Brit. Assoc. XVI. 7. 



8 Narrative of an Expedition, &c. 



