158 



ON THE PEKIODICITY OF THE AURORA BOREALIS. 



Sept. 3. 



" 3. 



* 3. 



« 4. 



" 4. 



- 5. 



« 6. 



" 7. 



« 8. 



" 8. 



" 9. 



« 10. 



" 10. 



" 10. 



« 11. 



" 12. 

 " 12. 



" 13. 

 " 13. 

 " 14. 

 " 15. 

 " 15. 

 " 18. 

 " 28. 

 " 29. 

 " 29. 

 « 30. 

 " 30. 



1. 



1. 



1. 



1. 



1. 



1. 



2. 



2. 



2. 



2. 



3. 



3. 



5. 



6. 



7. 



8. 



9. 

 12. 

 14. 

 15. 



Oct. 

 « 



New Haven. Herrick. Newton and Loomis. 

 Litchfield. Hough. New York. Hough. 

 Providence. Caswell. Chrisliania. Hansteen. 

 New Haven. Herrick. Newton and Loomis. 

 New York. Hough. Chrisliania. Hansteen. 



New York. 

 New York. 

 New York. 

 New Haven. 

 New York. 



Hough. 

 Hough. 

 Hough. 



Sitka. Kupffer. 

 Bradley. Newton and Loomis. 

 Hough. 

 Sitka. Kupffer. 



New Haven. Herrick. Newton and Loomis. 

 Litchfield. Hough. Providence. Caswell. 

 Christiania. Hansteen. 

 Litchfield. Hough. 

 New York. Hough. 



Barrow Strait. Kane. Christiania. Hansteen. 

 New York. Hough. 

 Hamburg. Schmidt. Christiania. 

 New York. Hough. Christiania. 

 Newport. Herrick. Newton and Loomis. 

 New York. Hough. Barrow Strait. Kane. 

 Rudolph. 

 Hough. 



Hough. Litchfield. Hough. 

 Rudolph. 

 Herrick. Newton and Loomis. 



Hansteen. 

 Hansteen. 



Jakobshavn. 

 New York. 

 New York. 

 Jakobshavn. 

 New Haven ? 



New York. Hough. 



Worcester. Chandler. Providence. Caswell. 



New Haven. Herrick. Newton and Loomis. 



Litchfield. Hough. Neio York. Hough. 



Hamburg. Schmidt. Christiania. Hansteen. 



Sitka. Kupffer. St. Lves, Hunts. Watts. 1 



Jakobshavn. Rudolph. 



New Haven. Herrick. Newton and Loomis. 



Litchfield. Hough. Providence. Caswell. 



Hamburg. Schmidt. Bonn. Jahn. 



Aix-la- Chapelle. Heis. 



New York. Hough. Litchfield. Hough. 



Hamburg. Schmidt. 



Christiania. Hansteen. 



Litchfield. Hough. New York. Hough. 



Worcester. Chandler. New York. Hough. 



New York. Hough. 



New York. Hough. 



Jakobshavn. Rudolph. 



Yakoutsk. Kupffer. Jakobshavn. Rudolph. 



Christiania. Hansteen. 



» Proc. Brit. Assoc. XX. 41. 



Oct 17. 



" 21. 



" 22. 



« 2G. 



" 27. 



" 27. 



« 27. 



" 27. 



" 28. 



" 29. 



" 29. 



" 29. 



" 31. 

 Nov. 7. 



" 8. 



" 8. 



" 10. 



" 10. 



" 10. 



" 11. 



" 25. 



" 30. 

 Dec, 1. 



" 1. 

 1. 

 1. 



» 3. 

 4. 



" 5. 



" 5. 



" 5. 

 6. 



" 7. 



" 8. 



" 10. 



" 11. 



" 15. 



" 17. 



" 20. 



" 23. 



" 26. 



" 26. 



" 27. 



« 27. 



" 27. 



« 28. 



Wellington Channel. Kane. 

 Wellington Channel. Kane. 

 Wellington Cliannel. Kane. 

 Wellington Channel. Kane. 

 New Haven. Herrick. Newton and Loomis. 

 Litchfield. Hough. New York. Hough. 

 Wellington Channel. Kane. 

 Christiania. Hansteen. 

 Litchfield. Hough. Christiania. Hansteen. 

 New Haven. Herrick. Newton and Loomis. 

 Litchfield. Hough. Nero York. Hough. 

 Kane. 

 Kane. 



Hough. Jakobshavn. Rudolph. 



Hough. 



W. Kane. 



Wellington Channel. 



Wellington Channel. 



New York. 



New York. 



Lot. 74° N Long. 92 



New Haven. Bradley. Newton and Loomis. 



Litchfield. Hough. New York. Hough. 



Jakobshavn. Rudolph. 



New York. Hough. 



Jakobshavn. Rudolph. 



Jakobshavn. Rudolph. 



New Haven f Bradley. Newton and Loomis. 



Lat. 74° N. Long. 94° W. Austin. 1 



Lancaster Sound. Kane. 



Griffith's Island. Markham. 2 



Lancaster Sound. Kane. 



New York. Hough. 



New York. Hough. 



Lancaster Sound. Kane. 



Griffith's Island. Markham. 



New York. Hough. Lancaster Sound. Kane. 



Jakobshavn. Rudolph. 



Lancaster Sound. Kane. 



Jakobshavn. Rudolph. 



New York. Hough. Lancaster Sound. Kane. 



Sitka. Kupffer. Jakobshavn. Rudolph. 



Sitka. Kupffer. 



New York. Hough. 



Jakobshavn. Rudolph. 



New Haven. Bradley. Newton and Loomis. 



Lancaster Sound. Kane. 8 



Cambridge. Bond. Lovering. 



Lancaster Sound. Kane. 



Christiania. Hansteen. 



New York. Hough. Lancaster Sound. Kane. 



1 Arctic Miscellanies, p. 113. 



2 Franklin's Footsteps, &c. p. 70. 



s The U. S. Grinnell Expedition, First, p. 523. 



