ON THE PERIODICITY OF THE AURORA BOREALIS. 



145 



Aug. 4. 



4. 



" 16. 



" 21. 



" 21. 

 " 22. 

 " 23. 

 " 24. 

 " 25. 

 Sept.10. 

 " 12. 

 " 13. 

 " 13. 

 " 15. 

 " 16. 

 " 16. 

 " 24. 

 " 24. 

 " 25. 

 " 26. 

 '• 26. 

 " 27. 

 " 28. 

 " 29. 

 " 29. 

 " 29. 

 " 29. 

 " 29. 

 " 29. 

 " 29. 

 " 30. 

 1. 

 3. 

 5. 

 6. 

 7. 

 8. 



12. 



13. 



13. 



14. 



1.5. 



16. 



19. 



19. 



Oct. 



Sitka. Kupffer. 

 Newton and Loomis. 



New York. Plough. Toronto. Sabine. 



Sitka. Kupffer. 



Toronto. Sabine. 



Cambridge. Bond. Lovering. Toronto. Sabine. 



Christiania. Hansteen. Sitka. Kupffer. 



Near Rankin s Inlet. Rae. Sitka. Kupffer. 



Makersloun. Broun. 



Sitka. Kupffer. 



New York. Hough. 



New York. Hough. 



Christiania. Hansteen. 



New Haven. Herrick. 



Sitka. Kupffer. 



England. Germany. Irkutsk. Kupffer. 1 Bone. 



New Haven. Herrick. Newton and Loomis. 



Neio York. Hough. Providence. Caswell. 



England. Hough. Christiania. Hansteen. 



Hobarton. Sabine. 



Hobarton. Sabine. 



England. Hough. Christiania. Hansteen, 



Malcerstoun. Broun. Hobarton. Sabine. 



Inverness, Scotland. Hough. 



Near Louviers. 2 



Cambridge. Bond. Lovering. » 



Worcester. 3 Chandler. 



Neiv Haven. Herrick. Newton and Loomis. 



New York. Hough. Providence. Caswell. 



Westmoreland. Sturgeon.* Swansea. Hough. 



Christiania. Hansteen. Carlisle. Hough. 



Makerstoun. Broun. Jakobshavn. Rudolph. 



Westmoreland. Sturgeon. 



Christiania. 



Carlisle? 



Christiania. 



Christiania. 



Jakobshavn. 



Makersloun. 



Hansteen. Borsley. ■ Havre. 1 



Hansteen. 



Hansteen. 



Rudolph. 



Broun. 



Carlisle. 



Toronto. Sabine. 

 Christiania. Hansteen. Toronto. Sabine. 

 New York. Hough. Christiania. Hansteen. 

 Westmoreland. Sturgeon. 

 Bonn. Schmidt. Toronto. Sabine. 

 Christiania. Hansteen. Toronto. Sabine. 

 Makerstoun. Broun. 



Peru, N. Y. Herrick. Newton and Loomis. 

 Malcerstoun. Broun. 



1 Annuaire Magnet, et Meteor, tie Russie, 1844. 



2 Compt. Rend. XXV. 765. 



3 Fifteenth Report of the Lunatic Asylum, p. 77, &c. 



4 Mem. Lit. anil Phil. Soc. Manthest. VIII. 381. 

 6 Atbenreum, 1847, p. 1034 and 1058. 



VOL. X. 



Oct. 22. 

 " 23. 

 " 23. 

 " 24. 

 " 24. 

 " 24. 

 " 24. 

 " 24. 

 " 24. 

 " 24. 

 " 24. 

 " 25. 

 " 25. 

 " 26. 

 " 27. 

 " 29. 

 " 31. 

 Nov. 1. 



1. 

 " 1. 

 " 1. 



1. 



2. 

 " 3. 

 " 5. 



6. 



7. 



8. 



9. 

 " 10. 

 " 10. 

 " 11. 

 " 11. 

 « 12. 

 " 12. 

 " 13. 

 " 14. 

 " 17. 

 " 17. 

 " 18. 

 " 19. 

 " 19. 

 " 22. 

 " 22. 



Hobarton. Sabine. 

 New York. Hough. 



Toronto. Sabine. 

 Hobarton. Sabine. 

 Barnaoul. Kupffer. Christiania. Hansteen. 

 New York. Hough. Hobarton. Sabine. 

 Durham. Chevallier. Cambridge. Challis. 1 

 Westmoreland. Sturgeon. York. Phillip.-. 

 Oxford. Rowell. Blackheath. Glaisher. 2 

 France. Brussels. Quetelct. Arago. 

 Germany. Jahn. 8 Spain. Rico. 

 Ireland. Christiania. Hansteen. 

 Barnaoul and Bogosfowski. Kupffer. 

 Paris. Hough. Christiania. Hansteen. 

 Makerstoun. Broun. Barnaoul. Kupffer. 4 

 Jakobshavn. Rudolph. 

 Cambridge, Oxford, fyc. England. Hough. 

 Makerstoun. Broun. 



Christiania. Hansteen. Jakobshavn. Rudolph. 

 New Haven. Herrick. Newton and Loomis. 

 New York. Hough. Toronto. Sabine. 

 France. Coulvier-Gravier. Arago. 

 Makerstoun. Broun. 



Sitka. Kupffer. Westmoreland. Sturgeon. 

 Bonn. Schmidt. 



New York. Hough. Christiania. Hansteen. 

 Toronto. Sabine. 

 Sitka. Kupffer. 



New York. Hough. Sitka. Kupffer. 

 Sitka. Kupffer. 

 Toronto. Sabine. 



New Haven. Herrick. Newton and Loomis. 

 Christiania. Hansteen. 

 New Haven. Herrick. Newton and Loomis. 

 Jakobshavn. Rudolph. 

 New Haven. Herrick. Newton and Loomis. 

 Providence, E. I? Caswell. 

 Christiania. Hansteen. 

 New York. Hough. 

 Ne%v York. Hough. 

 Christiania. Hansteen. 

 Brussels. Quetelet. 



Schmidt. Jahn. 



Makerstoun. Broun. Dunse. Stevenson. 

 New York. Hough. 

 Catharinebourg. Kupffer. 5 



19 



1 Athenaeum, 1847, p. 1152. 



2 Edin. New Phil. Journ. XLIV. 91. Phil. Mag. XXXI. 369. 

 8 Sitzangsbericht. derKfliaerl. Akademie, &c.Wien. XXIII. 262. 

 4 Annal. de l'Observ. Phys. Centrale de Russie, 1847, pp. 233 



et 353. 



6 Annal. de l'Observ. Phys. Centrale de Russie, 1847, p. 147 . 



