10G 



OX THE PERIODICITY OF THE AURORA BOREALIS. 



Feb. 3. 



4. 



6. 

 " 7. 

 " 13. 

 " 17. 

 « 17. 

 " 17. 

 " 23. 

 " 25. 

 Mar. 9. 

 " 29. 

 Apr. 6. 

 " 16. 

 Aug. 25. 

 " 25. 

 " 2G. 

 « 27. 

 « 27. 

 » 27. 

 " 27. 

 " 28. 

 •• 28. 

 •• 28. 

 " 28. 

 " 28. 

 ■• 28. 

 •' 29. 

 « 29. 

 « 29. 

 •• 29. 

 « 30. 

 « 31. 

 Sept. 8. 

 " 8. 



8. 



8. 

 « 8. 

 " 8. 



Fort Franklin. 

 Fort Franklin. 

 Fort Franklin. 

 Fort Franklin. 



Franklin. 

 Franklin. 

 Franklin. 

 Franklin. 



Gosport. Burney. 1 



G. Britain or Ireland. Dalton. 2 



St. Petersburg. Wisniewsky. Kupffer. 



Arago. Muncke, and Quetelet. 



Fori Franklin. Franklin. 



Fort Franklin. Franklin. 



Baumhauer. 



Edinburgh. Hough. 

 New York. Hough. 

 New Tork. Hough. 

 Be firing's Sea. Beechey. Force. 

 Paris. Boue 8 and Hough. 

 Copenhagen. Dau. Boue. 

 New Tork. Hough. 

 New Haven. Herriek. Loomis. 

 Perth, Scotland. Muncke. 4 

 Arago and Quetelet. 

 New York. Gale and Hough. 5 

 X tr Haven. Loomis. 6 

 Wilmington, Delaware. Gibbon. 7 

 Schenectady, X. T. Joslin. Canada? 

 Roxburghshire, Scotland. Muncke.* 

 Arago and Quetelet. 

 New Tork. Gale and Hough. 

 Schenectady, X. T. Joslin. 

 G. Britain or Ireland. Dalton. 

 AKlnegraden. Arago, Muncke, and Quetelet. 10 

 Neic Tork. Gale. 

 jVi ir Turk. Hough. Arago. 

 Boston. Hale. Lovering. 

 New Turk. Hough. 

 New Haven. Herriek. Loomis. 

 Wilmington. Gibbon. 

 Augusta, Maine. Bowdoin. u 

 Berlin. Humboldt. Finland, Sweden, fyc. 1 - 



i Phil. Mag. and Annals. 1.239 and 317. 

 2 Phil. Mag. and Annals. I. 



8 Not in Arago's Catalogue, though Boue" quotes him. 

 * Edin. Journ. Sci. VII. 377. Ferussac Bull. Univ. XII. "0. 

 6 Amer. Journ. Sci. XV. 

 6 Amer. Journ. Sci. XIV. 91. 

 ' Amer. Journ. Sci. XXXIII. 299. 



8 Amer. Journ. Sci. XIV. and Reports of Regents, &c. 1836, p. 

 196. 



Edin. Journ. Sci. VII. 77. Ferussac. Bull. Univ. XII. 70. 

 M Edin. New Journ. Sci. III. 379. 

 11 Amer. Journ Sci. XVIII. 72. 

 li Pogg. Ann. X. 511. Ferussac. Bull. Univ. IX. 191. _ 



Sept. 8. 



Denmark. Arago, Muncke, and Quetelet. 



New Haven. Herriek. Loomis. 



New Tork. Hough. Schenectady. Joslin. 



Canandaigua, N. Y. Hayes. 1 



Wilmington. Gibbon. 



G. Britain or Ireland. Dalton. Arago. 



Canonmills and Roslin. Muncke. 2 



Alford. Farquharson. Quetelet. 8 



Boston. Hale. Lovering. 



New Tork. Hough. Wilmington. Gibbon. 



New Haven. Herriek. Loomis. 



G. Britain or Ireland. Dalton. 4 



London. Kendall. 5 Gosport. Burney. 



Paris and Havre. Arago. Quetelet. 



St. Petersburg. Wisniewsky. Kupffer. 



Fussen {Inset), Sweden, fyc. Muncke. 6 



Copenhagen. Dau. 7 



Boreham. Forster. Gosport. Burney. 8 



Leipsic. Poggendorf. Stettin? Quetelet. 



Fussen and Kasan. Kupffer. 10 



.JWen.Quetelet. Canandaigua,X. T? Haves. 11 



Paris. Fussen. Quetelet. 



Finmark. Keilhau. Muncke. 12 



Chamisso Island. Beechey. 18 



Finmark. Keilhau. Quetelet and Muncke. 



G. Britain or Ireland. Dalton. .Manchester. 



Roxburghshire. Arago. Muncke. Quetelet. 



New Tork. Hough. 



Finmark. Keilhau. Quetelet and Muncke. 



Gosport. Burney. Muncke. 



Arago and Quetelet. 



Finmark. Keilhau. Muncke. 



Roxburghshire. Muncke. Quetelet. 14 



Roxburghshire. Muncke. Quetelet. 



Finmark. Keilhau. Quetelet and Muncke. 



New Tork. Hough. 



1 Amer. Journ. Sci. XIV. 



2 Quart. Journ. Sci. 1827, p. 489. Edin. New Journ. Sci. III. 

 378, and XVII. 138. 



8 Phil. Trans. 1829, p. 103. 

 * Annals of Phil. II. 395. 



5 Quart. Journ. Sci. 1827, p. 385. 



6 Kastn. Archiv. XIV. 



' Ferussac. Bull. Univ. XI. 295. 



8 Phil. Mag. III. 75. 



9 Ferussac. Bib. Univ. IX. 191. Pogg. Ann. X. 512. 

 w Kastn. Archiv. XIII. 166. 



11 Amer. Journ. Sci. XIV. 



12 Pogg. Ann. XIV. 621. 



13 A Narrative of a Voyage, p. 560. 



» Ferussac. Bull. Univ. XII. 70. 'Edin. Jour. Sci. XV. 171. 



