ON THE PERIODICITY OF THE AURORA BOREALIS. 



163 



Sept.10. 

 " 11. 

 " 12. 

 " 12. 

 " 13. 

 " 16. 

 " 16. 

 " 16. 

 " 16. 

 " 17. 

 " 17. 

 " 17. 

 " 17. 

 " 18. 

 " 18. 

 " 19. 

 " 19. 

 " 20. 

 " 21. 

 " 21. 

 " 22. 

 " 23. 

 " 29. 

 " 29. 

 Oct. 5. 



5. 



5. 



6. 



7. 



7. 



9. 

 " 10. 

 " 13. 

 " 13. 

 " 18. 

 " 18. 

 " 19. 

 " 19. 

 " 20. 

 " 20. 

 " 21. 

 Nov. 10. 

 " 10. 

 " 10. 

 " 10. 

 " 11. 

 " 11. 



Christiania. 

 Ghristiania. 

 Cambridge. 

 Christiania. 



Hansteen. 

 Hansteen. 

 Bond. Lovering. 

 Hansteen. Jalin. 



Jahn. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



Newberry. Johnson. Providence. Caswell. 



Christiania. Hansteen. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



Burlington. Thompson. Newberry. Johnson. 



Christiania. Hansteen. Jahn. 



Cambridge. Bond. Lovering. 



Burlington. Thompson. Newberry. Johnson. 



New Haven. Herrick. Newton and Loomis. 



Christiania. Hansteen. 



Christiania. Hansteen. 



New Haven. Herrick. Newton and Loomis. 



Baffin's Bay. Inglefield. Jahn. 



Lake Superior. Wagner. Boue. 



Christiania. Hansteen. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



Burlington. Thompson. 



Burlington. Thompson. 



Christiania. Hansteen. 



Catharinebourg. Kupffer. 



Cambridge. Bond. Lovering. 



Verden. Jahn. 



Cambridge. Bond. Lovering. 



Verden. Jahn. 



Christiania. Hansteen. Verden. Jahn. 



Wurtemberg. Jahn. Barnaoul. Kupffer. 



New Haven. Herrick. Newton and Loomis. 



Newberry. Johnson. Providence. Caswell. 



New Haven. Herrick. Newton and Loomis. 



Newberry. Johnson. 



Off Cape Farewell} Inglefield. 3 



Cambridge. Bond. Lovering. 



Providence, R. 1. Caswell. 



New Haven. Herrick. Newton and Loomis. 



Verden. Pape. Jahn. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



i Proceedings of Capt. E. A. Inglefield, p. 205. 

 s Inglefield adds, that the aurora was frequently very brilliant. 

 Force's Record of Auroral Phenomena, p. 7. 



Burlington. Thompson. Providence. Caswell. 

 Newberry. Johnson. 1 

 Dunse. Stevenson. Christiania. Hansteen. 

 Wurtemberg and Verden. Pape. Jahn. 

 New Haven. Herrick. Newton and Loomis. 

 Hansteen. 

 Hansteen. 



Herrick. Newton and Loomis. 

 Noodt. 

 Bond. Lovering. 

 Bond. Lovering. 



Christiania. 



Christiania. 



New Haven. 



Hammerfest. 



Cambridge. 



Cambridge. 



Sitka. Kupffer. 



Hammerfest. Noodt. 



Takoutsk. Kupffer. 



Burlington. Thompson. 



Christiania. Hansteen. 



Cambridge. Bond. Lovering. 



Northumberland Sound. Belcher. 2 



Christiania. Hansteen. 



Christiania. Hansteen. 



Cambridge. Bond. Lovering. 



Worcester. Chandler. 



Northumberland Sound. Belcher. 



New Haven. Herrick. Newton and Loomis- 



Christiania. Hansteen. 



Northumberland Sound. Belcher. 



Hammerfest. Noodt. 



Cambridge. Bond. Lovering. 



Burlington. Thompson. Hammerfest. Noodt. 



Northumberland Sound. Belcher. 



Sitka. Kupffer. 



Northumberland Sound. Belcher. 



Neunkirchen. Lichtenherger. Jahn. 



Sitka. Kupffer. 



Northumberlaiid Sound. Belcher. 



New Haven ? Herrick. Newton and Loomis. 



Christiania. Hansteen. 



Cambridge. Bond. Lovering. 



Bogoslowski. Kupffer. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



Christiunia. Hansteen. Sitka. Kupffer. 



Sitka Kupffer. 



Cambridge. Bond. Lovering. 



Worcester. Chandler. 



Christiania. Hansteen. 



NearHartford. Herrick. Newton and Loomis. 



1 Regents' Reports of the Univ. New York, 1853, p. 249. 



2 The last of the Arctic Voyages, &c. I. 1 73. 



