136 



ON THE PERIODICITY OF THE AURORA BOREALIS. 



Oct. 19. 



" 20. 



" 20. 



" 21. 



« 24. 



" 25. 



" 26. 



" 26. 



•" 26. 



" 28. 



" 31. 



" 31. 

 Nov. 1. 



" 2. 



" 2. 



" 4. 



" 8. 

 9. 



" 10. 



" 13. 



" 13. 



" 14. 



" 15. 



" 15. 



" 16. 



" 17. 



" 18. 



" 20. 



" 21. 



" 22. 



" 23. 



« 24. 



" 25. 



" 26. 



" 27. 



" 27. 



" 28. 



" 29. 

 Dec. 6? 



" 8. 



" 9. 



" 9. 



" 11. 



" 11. 



" 12. 



" 12. 



" 13. 



Toronto and Lake Athabasca. Lefroy. 

 New York. Hough. 

 Lake Athabasca. Lefroy. 

 New York. Hough. 



Christiania. Hansteen. Gothaab. Block. 

 Lake Athabasca. Lefroy. Gothaab. Block. 

 Christiania. Hansteen. 

 Lake Athabasca. Lefroy. 

 Makerstoun. Broun. Gothaab. Block. 

 Lake Athabasca. Lefroy. 

 Lake Athabasca. Lefroy. 

 Jakobshavn. Rudolph. 

 Lake Athabasca. Lefroy. Gothaab. Block. 

 Lake Athabasca. Lefroy. Gothaab. Block. 

 3Iakerstoun. Broun. 

 Gothaab. Block. 

 Gothaab. Block. 

 Lake Athabasca. Lefroy. 

 Gothaab. Block. 

 Lake Athabasca. Lefroy. 

 Makerstoun. Broun. 

 Makerstoun. Broun. Gothaab. Block. 

 Cambridge. Bond. Lovering. 

 Gothaab. Block. 

 Gothaab. Block. 

 Lake Athabasca. 

 Gothaab. Block. 

 Gothaab. Block. 

 Gothaab. Block. 

 Lake Athabasca. 

 Gothaab. Block. 

 Gothaab. Block. 

 Gothaab. Block. 



Gothaab. Block. Jakobshavn. Rudolph. 

 New Haven ? Herrick. Newton and Loomis. 

 Lake Athabasca. Lefroy. 

 Lake Athabasca. Lefroy. Gothaab. Block. 

 Lake Athabasca. Lefroy. 

 Edinburgh. Paul. 1 

 Parma. Colla. Arago. 2 

 Lake Athabasca. Lefroy. 

 Christiania. Hansteen. 

 Toronto. Sabine. Makerstoun. Broun. 

 Gothaab. Block. Jakobshavn. Rudolph. 

 New Haven. Herrick. Newton and Loomis. 

 Makerslouti. Broun. Jakobshavn. Rudolph. 

 Lake Athabasca. Lefroy. 



Jakobshavn. Rudolph. 

 Lefroy. Gothaab. Block. 



Lefroy. Gothaab. Block. 



Dec. 15. 



" 17. 



" 21. 



" 22. 



" 22. 



" 24. 



" 26. 



" 27. 



" 28. 



" 29. 



" 29. 



" 30. 



" 31. 



Jan. 



1 Edin. Phil. Journ. 1844, p. 378. 



2 L'Institut. Sci. Math. Phys. &c. XII. 9. 



8. 



9. 



9. 

 10. 

 11. 



12. 



13. 



13. 



15. 



16. 



16. 



17. 



17. 



18. 



19. 



21. 



22. 



22. 



23. 



24. 



24. 



24. 



24. 



25. 



26. 



27 



28. 



30. 



Lake Athabasca. Lefroy. 



Gothaab. Block. Jakobshavn. Rudolph. 



Gothaab. Block. 



Lake Athabasca. Lefroy. 



Jakobshavn. Rudolph. 



Gothaab. Block. 



Lake Athabasca. Lefroy. 



3Iakerstoun. Broun. Gothaab. Block. 



Gothaab. Block. 



Paris. Coulvier-Gravier. Arago. 



Gothaab. Block. 



Gothaab. Block. 



Gothaab. Block. 



1844. 

 Gothaab. Block. 

 Gothaab. Block. 

 Makerstoun. Broun. 



Gothaab. Block. Jakobshavn. Rudolph. 

 New Haven ? Herrick. Newton and Loomis. 

 Lake Athabasca. Lefroy. Gothaab. Block. 

 Christiania. Hansteen. 

 Lake Athabasca. Lefroy. Gothaab. Block. 

 Jakobshavn. Rudolph. 

 Makerstoun. Broun. Gothaab. Block. 

 Gothaab. Block. 

 Hamburg. Schmidt. 



New Haven. Herrick. Newton and Loomis. 

 Hamburg. Schmidt. 



Lake Athabasca. Lefroy. Gothaab. Block. 

 Lake Athabasca. Lefroy. 

 Christiania. Hansteen. 

 Lake Athabasca. Lefroy. 

 Jakobshavn. Rudolph. 

 Lake Athabasca. Lefroy. 

 Hamburg. Schmidt. Lake Athabasca. Lefroy. 

 Lake Athabasca. Lefroy. 

 Lake Athabasca. Lefroy. 

 Christiania. Hansteen. 

 Gothaab. Block. 



New Haven. Herrick. Newton and Loomis. 

 Philadelphia. Bache. 1 

 New York. Hough. Toronto. Hough. 

 Lake Athabasca. Lefroy. Gothaab. Block. 

 Gothaab. Block. 

 Lake Athabasca. Lefroy. 

 New Haven ? Herrick. Newton and Loomis 

 Lake Athabasca. Lefroy. 

 Lake Athabasca. Lefroy. 



i Magnet, and Meteor. Observ. Girard College. III. 2204. 



