108 



OS THE PERIODICITY OF THE AURORA BOREALIS. 



Nov. 13. Finmark. Keilhau. 



' 19. Finmarh Keilhau. 



" 22. Finmarh Keilhau. 



Dec. 1. New York. Hough. 



" 1. Sharon, Conn. Smith. Loomis. 



" 1. St. Petersburg. Wisniewsky. Kupffer. 



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



" 1. Manchester. Blackwall. London." 



" 1. Finmark. Keilhau. 



" 1. Russia. Erman. 3 Muncke. 



' 1. Arago and Quetelet. 



" 7. Finmark. Keilhau. 



" 9. Finmark. Keilhau. 



" 10. Finmark. Keilhau. 



" 13. Finmark. Keilhau. 



" 21. Finmark. Keilhau. 



'• 22. G. Britain or Ireland. Dalton. 



" 24. Finmark. Keilhau. 



" 26. G. Britain or Ireland. Dalton. 



" 26. Manchester. Blackwall. Gosport. Eurney. 



" 26. Muncke, Arago, and Quetelet. 



" 28. G. Britain or Ireland. Dalton. 



" 28. Arago and Quetelet. 



29. Finmark. Keilhau. 



" 31. Finmark. Keilhau. 



1829.* 



Jan. 1. Fin murk. Keilhau. 



" 2. Kendal. Marshall. Muncke. 



" 2. Arago and Quetelet. 



" 3. Finmark. Keilhau. 



" 4. Finmark. Keilhau. 



" 27. New Turk. Hough. Arago. 



" 28. Wilmington. Gibbon. 



" 30. New York. Hough. Arago. 



" 31. New York. Hough. Arago. 



Feb. 11. Berlin. Humboldt. Muncke. 



" 11. Arago and Quetelet. 



Mar. 4. G. Britain or Ireland. Dalton. 



" 6. G. Britain or Ireland. Dalton. 



" 18. Wilmington. Gibbon. 



" 21. Christian's Sound. Graah. 



1 Quart. Journ. Sci. 1828, p. 449. 



2 Phil. Mag. V. 77 and 153. 

 s Travels iu Siberia, I. 351. 



4 Southern Greenland, Winter of 1828-9. "The northern 

 lights (Aurora Borealis),aremarkableand beautiful phenomenon 

 of which the inhabitants of the greater part of Europe can form 

 no adequate conception, are in Greenland and Iceland a thing of 

 every -day occurrence, &c." Graah's Narrative of an Expedition 

 &c. p. 52. Force's record of Auroral Phenomena, p. 50. 



Mar. 22. G. Britain or Ireland. Dalton. 



" 23. England. Maclear. Muncke. 



" 23. Arago and Quetelet. 



" 27. Greenland. Graah. • 



Apr. 4. Neiv York. Hough. 



" 4. Dieppe. Arago, Muncke, and Quetelet. 1 



" 5. New York. Hough. Arago. 



" 8. New York. Hough. Arago. 



" 12. Greenland. Graah. 



May 2. Paris. Arago. 



" 4. G. Britain or Ireland. Dalton. 



" 29. New York. Hough. Arago. 



" 31. New York. Hough. Arago. 



June 1. New York. Hough. Arago. 



" 2. New York. Hough. Arago. 



" 7. New York. Hough. Arago. 



" 14. New York. Hough. Arago. 



" 17. G. Britain or Ireland. Dalton. 



" 21. New York. Hough. Arago. 



" 25. Kendal. Marshall. 



" 25. Muncke and Quetelet. 



July 25. G. Britain or Ireland. 



" 25. Arago and Muncke. 



Aug .23. Greenland. Graah. 



" 25. New York. Hough 



" 26. New York. Hough, 



" 29. Berwickshire, England. Hough. 



Septl3. New York. Feuchtwanger. 2 



" 18. New York. Hough. Arago. 



" 19. G. Britain or Ireland. Dalton. 



" 19. New York. Feuchtwanger. 



" 19. Muncke, Arago, and Quetelet. 



" 21. G. Britain or Ireland. Dalton. 



" 21. Alford. Farquharson. 



" 21. Muncke, Arago, and Quetelet. 



" 22. Aberdeenshire. Muncke. 



" 22. Muncke, Arago, and Quetelet. 



" 26. New York. Hough. Arago. 



Oct. I. 8 Aberdeenshire. Farquharson. 



" 1. Arago, Muncke, and Quetelet. 



" 3. G. Britain or Ireland. Dalton. 



" 3. Muncke, Arago, and Quetelet. 



" 6. Kendal. Muncke and Quetelet. 



" 11. G. Britain or Ireland. Dalton. 



1 Compt. Eend. XLII. 357. 



* Amer. Journ. Sei. XVIII. 393. 



8 Graah was at Nakarbik, in Lat. 63° N. and Long. 41° W. from 



October 1, 1829 to April 5, 1830 ; but he does not mention a sin- 

 gle appearance of the aurora. Force's Record of Auroral Phe- 

 nomena, p. 54. 



Dalton. 



Arago. 

 Arago. 



