164 



ON THE PERIODICITY OF THE AURORA BOREALIS. 



Jan. 4. 

 " 6. 



6. 

 " 8. 

 « 9. 

 " 10. 

 " 12. 

 " 13. 

 " 14. 

 " 18. 

 « 27. 

 " 28. 

 " 29. 

 " 30. 

 " 30. 

 " 31. 



1. 



1. 



4. 



Feb 



" 8. 

 " 13. 

 " 14. 

 « 14. 

 " 14. 

 " 14. 

 " 20. 

 " 21. 

 " 28. 

 Mar. 1. 

 " 7. 

 " 8. 

 " 8. 

 " 8. 



9. 



9. 

 « 10. 

 « 10. 



" 11. 



1853. 1 



Burlington, Vermont. Thompson. 3 



New Haven. Herrick. Newton and Loomis. 



Burlington. Thompson. 



Burlington. Thompson. Newberry. Johnson. 



Cambridge. Bond. Lovering. 



Christiania. Hansteen. 



St. Martin, Canada. Smallwood. 3 



St. Martin, Canada. Smalhvood. 4 



Christiania. Hansteen. 



Noodt. 



Hansteen. 



Hansteen. 



Noodt. 

 Bond. Lovering. 

 Chandler. 5 



Hammerfest. 



Christiania. 



Christiania. 



Hammerfest 



Cambridge. 



Worcester. 



Newberry. Johnson. 



Cambridge. Bond. Lovering. 



Newberry. Johnson. St. Martin. Smallwood. 



Tobolsk. Kupffer. 



Burlington. Thompson. 



St. Martin. Smallwood. 



Hammerfest. Noodt. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



Burlington. Thompson.' 



St. Martin. Smallwood. 



St. Martin. Smallwood. 



Newberry. Johnson. 



Hammerfest. Noodt. 



Hammerfest. Noodt. 



Burlington. Thompson. Neicberry. Johnson. 



Cambridge. Bond. Lovering. 



Burlington. Thompson. Newberry. Johnson. 



St. Martin. Smallwood. 



Cambridge. Bond. Lovering. 



New Haven. Bradley. Newton and Loomis. 



New Haven ? Bradley. Newton and Loomis. 



Burlington. Thompson. 



Takoutsk. Kupffer. 



1 Maguire refers to a frequent display of the aurora during the 

 winter of 182.3-4, at Moore's Harbor, in Lat. 71° N. and Long. 

 156° W. Proceedings of Capt. Maguire, &c. 



2 Amer. Jour. Sci. Second Series, XVII. 446. 

 8 Amer. Journ. Sci. Second Series, XVII. 288. 



4 Smallwood observed traces of the aurora in thirty-nine nights 

 in 1853; in fifty nights in 1854, and in thirty-seven nights in 

 1855. Amer. Journ. Sci. Second Series, XXI. 288. 



6 Twenty-First Report of the Lunatic Asylum, p. 77. 



