ON THE PERIODICITY OF THE AURORA BOREALIS. 



Ill--, 



Nov. 23. Aberdeenshire. 



Dec. 7. Bos/on. Hale. 



" 7. Fort Frankh'n. 



" 8. Fort Franklin. 



Farquharson. 

 Lovering. 

 Franklin. 

 Franklin. 



Arago. 1 



Jan. 4. 



« 5. 



" 5. 



" 8. 



« 16. 



" 16. 



" 17. 



" 21. 



" 21. 



" 29. 

 Feb. 3. 



« 8. 



" 9. 



" 10. 



" 11. 



" 11. 



" 19. 

 Mar. 2. 



" 7. 



« 8. 



" 9. 



" 10. 



" 11. 



" 13. 



« 14. 



« 15. 



" 26. 



" 28. 



" 29. 



" 29. 



" 29. 



" 29. 

 Apr. 3. 



" 6. 



" 13. 



" 23. 



1826. 



Fort Franklin. Franklin. 



Kbnigsberg. Muncke. 2 



Leith. Coldstream, &c. Arago. Quetelet. 8 



Fort Franklin. Franklin. 



Leith. Coldstream and Foggo. 4 



Muncke, Arago, and Quetelet. 



Leith. Hough. 



G. Britain or Lreland. Dalton. Quete'et. 



Edinburgh. Coldstream. 6 Quetelet. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Leith. Coldstream and Foggo. Arago. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



G. Britain or Ireland. Manchester. Dalton. 



Edinburgh. 6 Coldstream. Dublin. 



Fort Franklin. Franklin. 



Muncke, Arago, and Quetelet. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



1 Phil. Trans. 1829, p. 106. 



2 Gilbert. Ann. LXXXVI. 560. 

 8 Edin. Journ. Sci. "V. 190. 



* Edin. Journ. Sci. V. 190. 

 6 Edin. Journ. Sci. IX. 129. 

 6 Phil. Mag. IV. 419, and y. 154. 

 Phil. Trans. 18.38, Pt. I. p. 293. 



VOL. X. 



Edin. Journ. Sci. V. 190. 



14 



Jan. 



o. 



9. 



9. 

 16. 

 16. 

 18. 

 IS. 

 18. 

 19. 

 21. 

 30. 

 31. 



Carlisle and Roxburghshire. Muncke. 1 

 Arago and Quetelet. 

 Behring's Sea. Beechey. 



Quetelet and Bone. 



Canonmills. Quetelet. 2 

 Near Edinburgh? 



Behring's Sea. Beechey. 4 Force. 



Beh ring's Sea. Beechey. Force. 



New Tork Slate. Dough. 6 



New Tork. Hough. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



Fort Franklin. Franklin. 



1827. 



Fort Franklin. Franklin. 



Kendal. Marshall. 6 



Muncke, Arago, and Quetelet. 



G. Britain or Ireland. Dalton. 



Edinburgh. Blackadder. Muncke. Quetelet. 



New Haven. Derrick. Loomis. 



G. Britain or Lreland. Dalton. Arago. 



Gosport. Burney. Muncke and Quetelet. 



New York. Hough, 



Edinburgh. Hough. 



Arago. 



Fort Franklin. Franklin. 



i Quart. Journ. Sci. 1827, p. 229. Ann. Chcm. ct Phys. 

 XXXIII. 421. 



2 Fcrussac. Bull. Univ. XI. 33. 



8 Edin. Journ. Sci. IX. 129. 



4 Narrative of a Voyage, &C. I. p. 329. 



6 All the auroras of Hough are to be understood as for the 

 Stair of New York, unless otherwise specified. See " Results of .i 

 series of Meter. Observ. &c. in the State of New Y'ork, &c, coin- 

 piled by Franklin B. Hough." 



6 Edin. Journ. Sci. VI. 377. 



• Edin. New Phil. Journ. HI. 342. 



