ON THE PERIODICITV OF THE AURORA BOREALIS. 



Ill 



Oct. 16. Bedford. White. Gosporl. Burney. 1 



" 17. New York. Hough. 



" 17. G. Britain or Ireland. Dalton. Arago. 



" 17. Bedford. White. Gosport. Burney. Quetelet. 



" 18. St. Petersburg. Wisniewsky. Kupffer. 



" 22. G. Britain or Ireland. Dalton. 



" 22. St. Petersburg." Wisniewsky. Kupffer. 



" 27. New Tori: Hough. 



" 28. New York. Hough. 



Nov. 1. G. Britain or Ireland. Dalton. 



" 1. Arago, Muncke, and Quetelet. 



" 1. Bedford. White. Gosport. Burney. 



" 1. Boston, England. 



" 3. G. Britain or Ireland. Dalton. 



" 4. G. Britain or Ireland. Dalton. 



" 4. Bedford. White. Gosport. Burney. 



" 4. Arago, Muncke, and Quetelet. 



" 7. G. Britain or Ireland. Dalton. 



" 7. Bedford. White. Gosport. Burney. 8 



" 7. Arago, Muncke, and Quetelet. 



" 9. New York. Hough. 



" 10. G. Britain or Ireland. Dalton. 



" 14. Sheriff's Bag. Ross. 



" 19. New York. Hough. 



" 20. New Haven. Olmsted. Loomis. 



" 20. New York. Hough. 



" 21. New York. Hough. 

 Dec. I. 4 



" 6. New York. Hough. 



" 7. New York. Hough. 



" 7. Christiania. Hansteen. Muncke. 



" 7. Marburg. Von Mons. Warsaw* 



" 7. Arago, Muncke, and Quetelet. 



" 8. St. Petersburg. Wisniewsky. Kupffer. 



" 10. New York. Hough. 



" 11. Boston. Hale. Lovering. 



" 11. Newberg, Vt. Johnson. 6 New York. Hough. 



" 11. Sharon, Conn. Smith. Loomis. 



" 11. Wilmington. Gibbon. 



" 11. G. Britain or Ireland. Dalton. Ara^o. 



" 11. Bedford. White. Gosport. Burney. 



" 11. Arago, Muncke, and Quetelet. 



" 12. New York. Hough. Wilmington. Gibbon. 



> Phil. Mag. VIII. 465. 



2 The observations at St. Petersburgh from 1824 to 1834 were 

 made by Wisniewsky and published by Kupffer. 

 » Phil. Mag. IX. 79. 

 * Kastn. Arcliiv. XX. 376. 

 6 Kastn. Archiv. XX. 375-6. 

 e Reports of Regents of New York, &c. 



Jan. 



Feb. 



Sharon, Conn. Smith. Loomis. 



G. Britain or Ireland. Dalton. 



Bedford. White. Gosport. Burney. 



Arago, Muncke, and Quetelet. 



G. Britain or Ireland. Dalton. 



Bedford. White. Gosport. Burney. Quetelet. 



G. Britain or Ireland. Dalton. 



Gosport. Burney. Bedford. White. 



Warsaw. Kastner. Quetelet. 



St. Petersburg. Wisniewsky. Kupffer. 



Sheriff's Bay. Ross. 



G. Britain or Ireland. Dalton. 



G. Britain or Ireland. Dalton. 



Arago, Muncke, and Quetelet. 



Gosport. Burney. Kendal. Hough. 



Kendal. Hough. 



1831. 



o. 1 



6. 



6. 



6. 



7. 



7. 



7. 



7. 



7. 



7. 



8. 



8 



8. 

 10. 

 10. 

 11. 

 11. 

 14. 

 14. 

 15. 

 16. 

 21. 



6. 



Gibbon. 



Gibbon. 



G. Britain or Ireland. Dalton. 



New York. Hough. Wilmington. 



G. Britain or Ireland. Dalton. 



Gosport. Burney. 



New York. Hough. Wilmington. 



Bedford. White. Gosport. Burney. Brussels. 1 



G. Britain or Ireland. Dalton. 8 



Geneva. Wartman. Paris. Arago. 4 



Spain. Eyero. Rico. Woolwich. Sturgeon. 5 



Utrecht. Moll. Krankfurt. Kastner. Quetelet. 6 



G. Britain or Ireland. Dalton. 



Gosport. Burney. Quetelet. 



Woolwich. Sturgeon. Bedford. White. 



G. Britain or Ireland. Dalton. 



Gosport. Burney. 



G. Britain or Ireland. Dalton. 



Gosport. Burney. Bedford. 



New York. Hough. 



At Sea. Quetelet. 7 



At Sea. Quetelet. 



At Sea. Quetelet. 



G. Britain or Ireland. 



New York. Hough. 



Quetelet. 

 White. 



Dalton. 



Wilmington. 



Gibbon. 



1 Ross remarks that he had scarcely noticed an aurora duriDg 

 the whole winter. Force's Record, &c. p. 86. 



2 Fenissac. Bull. Univ. XVX 148. 

 8 Phil. Mag. IX. 233. 



♦ Bib. Univ. XLVI. 



5 Phil. Mag. IX. J27. 



6 Femssac. Bull. Univ. XVI. 

 and Kastn. Archiv. XXI. 



7 Compt. Rend. II. 329. 



89. Schweigg. Jahr. LXI. 



