ON THE PERIODICITY OF THE AURORA BOREALIS. 



159 



Dec. 28. Christiania. Hansteen. 



" 20. Lancaster Sound. Kane. 



" 30. Jakobshavn. Rudolph. 



" 31. Lancaster Sound. Kane. 



Jan. 



Feb. 2 



l. 1 



2. 



3. 



4. 



4. 



8. 

 15. 

 19. 

 20. 

 20. 

 21. 

 21. 

 21. 

 23. 

 23. 

 25. 

 26. 

 27. 

 28. 

 29. 



2. 



5. 



5. 



6. 



7. 



9. 

 12. 

 13. 

 18. 

 18. 

 18. 

 18. 

 19. 

 19. 

 19. 



1851. 



Lancaster S'd. Kane. Jakobshavn. Rudolph. 



Lancaster S'd. Kane. Jakobshavn. Rudolph. 



Lancaster Sound. Kane. 



Lancaster Sound. Kane. 



Hammerfest. Noodt. 



Newberry. Johnson. 



Lancaster S'd. Kane. Jakobshavn. Rudolph. 



Litchfield, Conn. Hendrick. 3 



Catharinebourg and Tobolsk. Kupffer. 8 



Zlatoouste. Kupffer. 8 



Newberry. Johnson. 



New Haven. Herrick. Newton and Loomis. 



Litchfield. Hendrick. 



New Haven. Herrick. Newton and Loomis. 



Christiania. Hansteen. Lancaster S'd. Kane. 



Jakobshavn. Rudolph. 



Baffin's Bay. Kane. 



Kane. 

 Kane. 

 Kane. 

 Kane. 



Hammerfest. Noodt. 



Baffin's Bay. 



Baffin's Bay. 



Baffin's Bay. 



Baffin's Bay. Kane. Bonn. Schmidt. 



Cambridge. Bond. Lovering. 



Newberry. Johnson. Baffin's Bay. Kane. 



New York. Hough. 4 Baffin's Bay. Kane. 



Baffin's Bay. Kane. 



Jakobshavn. Rudolph. 



Providence, R. I. Caswell. 



Baffin's Bay. Kane. 



Cambridge. Bond. Lovering. 



New York. Hough. Providence. Caswell. 



New Haven. Herrick. Newton and Loomis. 



Newberry. Johnson. Litchfield. Hendrick. 



New York. Hough. Christiania. Hansteen. 



Newberry. Johnson. Litchfield. Hendrick. 



Biffin's Bay. Kane. Jakobshavn. Rudolph. 



1 The anrora was seen eleven times in January ; twelve times in 

 February ; mid four times in March, 1851, by Capt Austin, in Eat. 

 74° N. and Long. 94° W. Arctic Miscellanies, p. 197, &c. 



1 Regents' Reports of the Univ. New York, 1851, p. 524. 



3 Annal. de l'Observ. Phys. Centrale de Russie, 1851, p. 127 

 and p. 549. 



* Regents' Reports of the Univ. New York, 1851. 



Feb. 20. 1 Lat. 74° N. Long. 94° W. Austin. 



" 20. Christiania. Hansteen. 



" 21. Baffin's Bay. Kane. 



" 23. Litchfield. Hendrick. Christiania. Hansteen. 



" 24. Baffin's Bay. Kane. 



" 25. Baffin's Buy. Kane. Christiania. Hansteen. 



" 26. Baffin's Bay. Kane. Barnaoul. Kupff.r. 



" 27. Baffin's Bay. Kane. Hammerfest. Noodt. 



" 28. Newberry. Johnson. 



Mar. 1. New York. Hough. 



" 22. New York. Hough. Newberry. Johnson. 



" 22. New Haven f Herrick. Newton and Loomis. 



" 22. Litchfield. Hendrick. Christiania. Hansteen. 



" 25. Lat. 74° N 94° W. Austin. 3 



" 26. Baffin's Bay. Kane. 



" 26. St. Ives, Hunts. Watts. 



" 28. New Haven. Herrick. Newton and Loomis. 



" 28. Worcester. Chandler. 8 New York. Hough. 



" 28. Baffin's Bay. Kane. 



" 29. Cambridge. Bond. Lovering. 



" 29. New York. Hough. Newberry. Johnson. 



" 29. New Haven. Herrick. Newton and Loomis. 



" 29. Litchfield. Hendrick. Jakobshavn. Rudolph. 



" 31. New York. Hough. 



Apr. 1. New York. Hough. 



" 3. New York. Hough. 



" 5. New York. Hough. 



" 6. Baffin's Bay. Kane. 



" 17. New York. Hough. 



" 19. New York. Hough. 



" 22. New York. Hough. 



" 30. New York. Hough. 



May 1. Providence. Caswell. New York. Hough. 



" 1. New Haven. Herrick. Newton and Loomis. 



" 1. Worcester. Chandler. Litchfield. Hendrick. 



" 2. New York. Hough. 



" 4. New York. Hough. 



" 12. New York. Hough. 



" 16. Litchfield. Hendrick. 



" 20. New York. Hough. 



" 24. Cambridge. Bond. Lovering. 



" 26. Litchfield. Hendrick. 



" 30. New York. Hough. 



June 5. Cambridge. Bond. Lovering. 



1 In regard to the winter of 1850-1, in Lat. 74° N. and Long. 

 95° W., Osborne says : " With one portion of the phenomena of 

 the North Sea we were particularly disappointed; and this was the 

 aurora." Stray Leaves from an Arctic Journal. 



2 Arctic Miscellanies, p. 291. 



8 Nineteenth Report of the Lunatic Asylum, p. 65. 



