ON THE PERIODICITY OF THE AURORA BOREALIS. 



97 



Oct. 25. 



Nov. 2. 



7. 



Dec. 10. 



Jan. 4. 



" 25. 

 Feb. 22. 

 Oct. 6. 



" 11. 



" 12. 



" 15. 

 Dec. 5. 



Jan. 13. 

 Mai-. 19. 



" 19. 



« 19. 

 Apr. 12. 



« 13. 

 Aug. 23. 

 Sept.ll. 



G. Britain or Ireland. Dalton. 

 1800. 



G. Britain or Ireland. Dalton. 

 G. Britain or Ireland. Dalton. 

 G. Britain or Ireland. Dalton. 



1801. 



G. Britain or Ireland. Dalton. 



G. Britain or Ireland. Dalton. 



G. Britain or Ireland. Dalton. 



G. Britain or Ireland. Dalton. 



Abo. Hallstrom. 1 Muncke 2 and Quetelet. 8 



Abo. Hallstrom. Muncke and Quetelet. 



Abo. Hallstrom. Boue. 



Edinburgh. Brewster. 4 Muncke and Quetelet. 



1802. 



Sweden. Hallstrom. Muncke and Quetelet. 



G. Britain or Ireland. Dalton. 



Sweden. Hallstrom. Muncke and Quetelet. 



G. Britain or Ireland. Dalton. 



Sweden. Hallstrom. Muncke and Quetelet. 



St. Petersburg. Euler. 6 



Sweden. Hallstrom. Boue\ 



Sweden. Hallstrom. Muncke and Quetelet. 



Sweden. Hallstrom. Muncke and Quetelet. 



Salem. Holyoke. Lovering. 



New Haven. Dwight. Loomis. 



Schaageragt. Lat. 57.° Long. 8.° Horner. 



Muncke and Quetelet. 



G. Britain or Ireland. Dalton. 



G. Britain or Ireland. Dalton. 



1803. 



New Haven. Dwight. Loomis. 

 Salem. Holyoke. Lovering. 

 Paris. Bouvard. 



New Haven. Leffingwell. Loomis. 

 G. Britain or Ireland. Dalton. 

 G. Britain or Ireland. Dalton. 

 Salem. Holyoke. Lovering. 

 G. Britain or Ireland. Dalton. 



1 Gilbert. Ann. XVIII. 75. 



2 Gehler. Physikal. Wdrterbuch. VII. 138 



8 Nouveaux Mem. de l'Acad. Brux. XII. 61. 



» Edin. Jonrn. Sci. V. 74. 



6 Mem. de l'Acad. St. Petcrsb. III. 346. 



VOL. X. 



Sept. 17. Salem. Holyoke. Lovering. 



" 17. G. Britain or Ireland. Dalton. 



" 19. Salem. Holyoke. Lovering. 



" 19. Nero Haven. Leffingwell. Loomis. 



Oct. 12. G. Britain or Ireland. Dalton. 



Dec. 3. G. Britain or Ireland. Dalton. 



1804. 



Feb. 2. G. Britain or Ireland. Dalton. 



Mar. 29. Paris. Bouvard. 



Apr. 1. Salem. Holyoke. Lovering. 



" 1. New Haven. Day. Loomis. 



" 1. G. Britain or Ireland. Dalton. 



" 4. G. Britain or Ireland. Dalton. 



May 2. Salem. Holyoke. Lovering. 



" 2. New Haven. Day. Loomis. 



" 2. G. Britain or Ireland. Dalton. 



" 12. Salem. Holyoke. Lovering. 



Sept. 7. St. Petersburg. Inochodzow. 1 



Oct. 12. Schnepfenthal? Ausfeld. 



" 22. Muncke and Quetelet. 



" 22. St. Petersburg. Inochodzow. 



" 22. Paris. Bouvard. 



" 22. Berlin. Wrede. Halle. Gilbert. 3 



" 22. Leipsic. Mollweide. London. 4 



" 22. Paris. Lamark. Quetelet. 



" 22. Dorpat. Parrot. 6 



" 22. Petersburg, Konigsberg, Brugge, §c. Muncke. 



Nov. 5. Salem. Holyoke. Lovering. 



" 22. G. Britain or Ireland. Dalton. 



" 25. G. Britain or Ireland. Dalton. 



1805. 



Jan. 1. St. Petersburg. Inochodzow. 



" 1. Carlisle. Pitt. Muncke. 



" 1. G. Britain or Ireland. Dalton. Quetelet. 



" 4. Salem. Holyoke. Lovering. 



Feb. 23. G. Britain or Ireland. Dalton. 



" 23. Manchester. Muncke and Quetelet/' 



Mar. 26. Carlisle. Pitt. Quetelet. 7 



Apr. 30. G. Britain or Ireland. Dalton. 



May 27. Muncke. 8 Quetelet. 



i Me'm. de l'Acad. St. Petcrsb. III. 436. 



a Gilbert. Ann. XIX. 108. 



8 Gilbert. Ann. XVIII. 252. XIX. 106. 



4 Phil. Trans. 1805, Pt. I. Meteor. Journ. p. 21. 



6 Edin. New Phil. Journ. I. 157. 



6 Nicholson's Journ. &c. X. 303. 



I Gilbert. Ann. XIX. 219. 



8 Gehler. Physikal. Wuiterbuch, VII. 138. 



13 



