OX THE PERIODICITY OF THE AURORA BOREALIS. 



129 



Feb. 12. 



" 15. 



" 16. 



" 17. 



" 18. 



" 19. 



« 20. 



« 21. 



" 22. 



" 22. 



« 22. 



" 23. 



" 23. 



" 23. 



" 24. 



« 24. 



« 25. 



" 26. 

 Mar. 1. 



" 11. 



" 11. 



" 11. 



« 12. 



" 14. 



" 14. 



« 14. 



" 14. 



" 15. 



" 15. 



" 15. 



" 16. 



" 16. 



" 17. 



" 17. 



" 19. 



" 20. 



" 20. 



" 21. 



" 21. 



« 22. 



« 22. 



" 22. 



" 23. 



" 23. 



" 24. 



New Haven. Herrick. Newton and Loomis. 



Worcester. Woodward. Newberry. Johnson. 



New York. Hough. Jakobshavn. Rudolph. 



New York. Hough. 



New Haven. Herrick. Newton and Loomis. 



Washington, D. C. Gilliss. 



New York. Hough. 



Hough. 

 Bond. Boston. Hale. Lovering. 

 Herrick. Newton and Loomis. 



Hough. Providence. Caswell. 



Bond. Lovering. 

 Boston. Hale. Lovering. Toronto. Sabine. 

 Newberry. Johnson. New York. Hough. 

 New Haven. Herrick. Newton and Loomis. 



Hough. Brussels. Quetelet. 



Hough. 

 Rudolph. 



Hough. 

 Herrick. Newton and Loomis. 



Hough. Newberry. Johnson. 

 Rudolph. 



Bond. Lovering. 



Bond. Lovering. 

 Worcester, Mass. Woodward. 1 

 New York. Hough. Newberry. Johnson. 

 Christiania. Hansteen. Canada. Sabine. 

 Cambridge. Bond. Lovering. 

 New York. Hough. Newberry. Johnson. 

 Worcester. "Woodward. Christiania. Hansteen. 

 Cambridge. Bond. Lovering. 

 New York. Hough. 



New York. Hough. Newberry. Johnson. 

 Hobarton, Van Dieman's Land. Sabine. 2 

 New Haven. Herrick. Newton and Loomis. 

 Cambridge. Bond. Lovering. 

 New York. Hough. 

 Cambridge. Bond. Lovering. 

 New Haven. Herrick. Newton and Loomis. 

 Newberry. Johnson. 

 Dunse. Stevenson. York. Phillips. 8 

 Durham. Chevalier. Belfast. Stevelly. 4 

 New Haven. Herrick. Newton and Loomis. 

 New York. Hough. Hobarton. Sabine. 

 Cambridge. Bond. Lovering. 



New York. 

 Cambridge. 

 New Haven. 

 New York. 

 Cambridge. 



New York. 

 New York. 

 Jahobshavn. 

 New York. 

 Neio Haven. 

 New York. 

 Jakobshavn. 

 Cambridge. 

 Cambridge. 



1 Med. and Surg. Jouni. Boston, XXIV. 83, 148 and 383. 



2 Magnet, and Meteor. Observ. Hobarton, I. 130. 

 8 Proc. Brit. Assoc. XVI. 7. 



4 Athenamm, 1841, pp. 266 and 340. 



Mar. 24. 



" 24. 



" 24. 



« 24. 



" 25. 

 Apr. 7. 



" 8. 



" 11. 



" 11. 



" 11. 



" 14. 



« 16. 



•' 16. 



" 16. 



" 18. 



" 18. 



" 18. 



" 19. 



" 19. 



" 19. 



" 20. 



" 21. 



" 22. 



" 25. 



" 27. 

 May 3. 



" 7. 



" 8. 



" 8. 



" 9. 



" 18. 



" 20. 



" 26. 

 June 11. 



" 15. 



" 15. 



" 16. 



" 17. 



" 21. 

 July 6. 



" 11. 



" 18. 



" 19. 



" 19. 



" 19. 



" 19. 



Neto Haven. Herrick. Newton and Loomis. 



New York. Hough. Providence. Caswell. 



Newberry. Johnson. Worcester. Woodward. 



Philadelphia. Bache. 1 



Cambridge. Bond. Lovering. 



Christiania. Hansteen. 



Christiania. Hansteen. 



Cambridge. Bond. Loverinir. 



New Haven. Herrick. Newton and Loomis. 



New York. Hough. Christiania. Hansteen. 



Cambridge. Bond. Lovering. 



Bond. Lovering. 

 Herrick. Newton and Loomis. 



Hough. 



Bond. Lovering. 

 Herrick. Newton and Loomis. 



Hough. 



Bond. Lovering. 

 Herrick. Newton and Loomis. 



Caswell. Toronto. Sabine. 



Cambridge. 

 New Haven. 

 Neto York. 

 Cambridge. 

 New Haven. 

 New York. 

 Cambridge. 

 New Haven. 

 Providence. 

 Neio York. Hough. 

 New York. Hough. 

 Toronto. Sabine. 



New York. Hough. Bogosloicski. Kupffer.'- 

 Toronto. Sabine. 

 Cambridge. Bond. Lovering. 



Hough. 

 Herrick. Newton and Loomis. 



Hough. 



Hough. 

 Sabine. 



Hough. 



Hough. 



Hough. 

 Herrick. Newton and Loomis. 



Hough. Brussels. Quetelet. 



New York. 



New Haven 



New York. 



New York. 



Hobarton. 



New York. 



New York. 



New York. 



Neto Haven. 



New York. 



Brussels. Quetelet. 



Worcester. Woodward. 



Worcester, Mass. Woodward. 



New York. Hough. 



Cambridge. Bond. Lovering. 



New York. Hough. 



Cambridge. Bond. Lovering. 



New Haven. Herrick. Newton and Loomis. 



Worcester. Woodward. 8 Washington. Gilliss. 



Neio York. Hough. Toronto. Sabine. 



1 Magnet, and Meteor. Observ. Girard College, I. 266 and 938. 



2 Annuaire Magnet, et Meteor. deRussie, 1841, pp. 373 et404. 



3 Med. and Surg. Joiun. Boston, XXV. 20, 103 and 231. 



VOL. X. 



17 



