ON THE PERIODICITY OF THE AURORA BOREALIS. 



109 



Dec. 15. Newberry. Johnson. 



" 10. Sacramento, California. Logan. 1 



" 1G. St. Petersburg. Kupffer. 2 



" 1G. Lat. 74° N. Long. C7° W. M'Clintock. 



" 17. Catharinebourg. Kupffer. 9 



" 17. Rochester, N. Y. Dewey. 



" 17. Hammerfest. Noodt. Brussels. Quetelet.* 



" 17. Lat. 74° N. Long. G7 C W. M'Clintock. 



" 17. Nertchinsk and Barnaoul. Kupffer. 2 



" 20. Cambridge. Bond. Lovering. 



" 20. Newberry. Johnson. 



" 22. Rochester, N. Y. Dewey. 



1858. 



Jan. 1. Hammerfest. Noodt. 



" 8. Cambridge. Bond. Lovering. 



" 8. Worcester. Bemis. 4 Providence. Caswell. 



" 8. Newberry. Johnson. Rochester. Dewey. 5 



" 8. Catharinebourg. Kupffer. 6 



9. Lat. 73° N. Long. 66° W. M'Clintock. 



" 1 1. Lat. 73° N. Long. 64° W. M'Clintock. 



" 1 2. Cambridge ? Bond. Lovering. 



" 12. Rochester, N. T. Dewey. 



" 12. Lat. 73° N. Long. 64° W. M'Clintock. 



" 17. Hammerfest. Noodt. 



" 17. Lat. 73° N. Long. G4° W. M'Clintock. 



Feb. 2. St. Petersburg. Kupffer. 6 Hammerfest. Noodt. 



2. Lat. 72° N. Long. 61° W. M'Clintock. 



" 3. Hammerfest. Noodt. 



" 3. Lat. 72° N Long. 61° W. 



6. Lat. 72° N. Long. 61° W. 



7. Lat. 72° N. Long. 61° W. 

 « 9. Lat. 72° N. Long. 61° W. 

 " 10. Lat. 72° N.Long. 61° W. 

 " 12. Sitka. Kupflfer. 

 " 13. Lat. 72°N. Long. Gr W. 

 " 14. Hammerfest. Noodt. 



" 15. Newberry Johnson. Sitka. Kupffer. 



" 15. Lat. 72° N. Long. 61° W. M'Clintock. 



" 16. Cambridge. Bond. Lovering. Sitka. Kupffer. 



" 16. Lat. 72° N. Long. 61° W. M'Clintock. 



1 Amer. Journ. Sci. Second Series, XXIX. 260. 



2 Annal. de l'Observ. Phys. Centrale de Russie, 1857, pp. 61, 

 147, 229, et 315. 



8 Bull, de l'Acad. Brux. Second Series, IV. 9. 



4 Twenty-Sixth Report of the Lunatic Asylum, p. 67. 



6 Reports of Regents of the Univ. New York, 1859, pp. 230 

 and 242. 



6 Annal. de l'Observ. Rhys. Centrale de Russie, 1858, pp. 41, 

 127, et451. 



vol. x. 22 



M'Clintock. 

 M'Clintock. 

 M'Clintock. 

 M'Clintock. 

 M'Clintock. 



M'Clintock. 



W. M'Clintock. 

 Tobolsk. Kupffer. 



Feb. 17. Rochester, N. T. Dewey. 



" 17. Lat. 71° N. Long. 61° W. M'Clintock. 



" 18. Lat. 7 1° N. Long. 61° W. M'Clintock. 



" 19. Lat. 7 \° N. Long. V>\° W. M'Clintock. 



Mar. 1. St. Petersburg. Bogoslowslci. Kupffer. 1 



2. Lat. 70° N. Long. 60° W. M'Clintock. 



" 3. St. Petersburg. Kupffer. 



" 4. Lat. 70° N. Long. 60° W. M'Clintock. 



" 5. Lat. 70° N. Long. 60° W. M'Clintock. 



" G. Lat. 70° N. Long. C0° W. M'Clintock. 



8. Lat. 70° N. Long. 60° W. M'Clintock. 



" 12. Worcester. Bemis. Sitka. Kupffer. 



" 13. Cambridge. Bond. Lovering. 



" 13. Worcester. Bemis. 



" 13. Newberry. Johnson. Providence. Caswell. 



" 13. Hammerfest. Noodt. 



" 13. Lat. 72° N. Long. CO 



" 14. Armagh. Robinson. 1 



" 14. Hammerfest. Noodt. 



" 15. Lat. 70° N. Long. 60° W. M'Clintock. 



" 10. Lat. 70° N. Long. 59° W. M'Clintock. 



" 17. Lat. 70° N. Long. 59° W. M'Clintock. 



" 18. Lat. 70° N. Long. 59° W. M'Clintock. 



" 28. Sitka. Kupffer. 



" 30. Sitka, Kupffer. 



" 31. Sitka. Kupffer. 



Apr. 1. Lat. 68° N. Long. 59° W. M'Clintock. 



" 2. Newberry. Johnson. 



" 3. Newberry. Johnson. 



" 9. Worcester. Bemis. 



" 9. Tasmania. Abbott. 3 Tobolsk. Kupflfer. 



" 9. Minister. Ileis. Chrisliania. Hansteeu. 4 



" 10. Cambridge. Bond. Lovering. 



" 10. Worcester. Bemis. Providence. Caswell. 



" 10. Newberry. Johnson. Melbourne. Neumaier. 4 



" 11. Cambridge. Bond. Lovering. 



" 11. Newberry. Johnson. Tobolsk. Kupffer. 



" 11. Tasmania. Abbott. 



" 11. Lai .67° N. Long. 59° W. M'Clintock. 



•' 12. Lat. 67° N. Long. 58° W. M'Clintock. 



" 14. Cambridge. Bond. Lovering. 



" 14. Lat. 60° N. Long. 58° W. M'Clintock. 



« 15. Lat. 66° N. Long. 58° W. M'Clintock. 



May 7. Newberry. Johnson. Rochester. Dewey. 



" 8. Sitka. Kupffer. Tasmania. Abbott. 



1 Annal. tie l'( lljserv. Phys. Centrale de Russie, 1859, p. 507. 



2 Phil. Mag. Fourth Series, XV. 326. 



3 Papers and PrOC. Roy. Soc. Tasmania, III. Pt. II. 



4 Bull, de l'Acad. Brux. VI. 365. 



