96 



ON THE PERIODICITY OF THE AURORA BOREALIS. 



Dec. 7. Keswick. Dalton. 



" 12. Padua. Toaldo and Chiminello. 



" 13. Moscow. Stritter. 



" 15. Salem. Holyoke. Lovering. 



" 30. Sagan. Freus. 



1793. 



Jan. 11. 



" 12. 



" 13. 



" 14. 



" 14. 

 Feb. 8. 



» 12. 



" 15. 

 Mar. 5. 



« 6. 



" 13. 



" 13. 



" 30. 



Apr. 5. 



9. 



" 14. 

 June 9. 

 Aug. 6. 



" 26. 



" 28. 



" 28. 

 Sept. 2. 



" 2. 



" 4. 

 Oct 20. 

 Nov. 8. 



Jan. 7. 



" 22. 

 Mar. 8. 



" 29. 

 Apr. 2. 



■ 3. 



" 30. 



" 30. 

 Nov. 11. 

 Dec. 8. 



Kendal. Dalton. 



Salem. Holyoke. Lovering. Kendal. Dalton. 



Salem. Holyoke. Lovering. Kendal. Dalton. 



New Haven. Stiles. Loomis. 



Pyschminsk, Mt. Oural, Siberia 



Kendal. Dalton. 



Hermann. 1 



Kendal. 

 Kendal. 

 Kendal. 



Kendal. 



Dalton. 

 Dalton. 

 Dalton. 

 Dalton. 



Thompson. 



Cambridge. Wigglesworth. Lovering. 



Salem. Holyoke. Lovering. Kendal. Dalton, 



Kendal. Dalton. 



Kendal. Dalton. 



Kendal. Dalton. 



Kendal. Dalton. 



Montmorenci. Cotte. 2 



Salem. Holyoke. Lovering. 



Montmorenci. Cotte. 



Salem. Holyoke. Lovering. 



St. Petersburg. Euler. 8 



Salem. Holyoke. Lovering. 



New Haven. Stiles. Loomis. 



Cambridge. Wigglesworth. Lovering. 



St. Petersburg. Euler. 



Isserstadt. Zeissing. 



1794. 



G. Britain or Ireland. Dalton.* 

 G. Britain or Ireland. Dalton. 

 G. Britain or Ireland. Dalton. 

 G. Britain or Ireland. Dalton. 

 St. Petersburg. Euler. 6 

 St. Petersburg. Euler. 

 Salem. Holyoke. Lovering. 

 Montmorenci. Cotte. 6 

 New Haven. Stiles. Loomis. 

 G. Britain or Ireland. Dalton. 



1 Nova Acta Sci. Acad. Petrop. XI. 562. 



2 Journ. de Phys. XLIII. 46, &c. 



8 Nova Acta Sci. Acad. Petrop. XI. 562. 

 * Met. Observ. and Essays, p. 218. 

 6 Nova Acta Sci. Acad. Petrop. XII. 524. 

 6 Journ. de Phys. XLIV. 297. 



Dec. 19. G. Britain or Ireland. Dalton. 

 1795. 



Mar. 11. St. Petersburg. Euler. 1 



May 24. Salem. Holyoke. Lovering. 



Sept. 8. G. Britain or Ireland. Dalton. 



" 14. G. Britain or Ireland. Dalton. 



Oct. 3. St. Petersburg. Euler. 



" 14. Salem. Holyoke. Lovering. 



" 18. G. Britain or Ireland. Dalton. 



1796. 2 



Feb. 6. St. Petersburg. Euler. 

 Apr. 6. Isserstadt. Zeissing. 



1797. 



1 Nova Acta Sci. Acad. Petrop. XIII. 582. 



2 None in England or the United States of America this year. 

 8 Nova Acta Sci. Acad. Petrop. XIV. 795. 



* Gilbert Annal. XVIII. 74. 



6 Nova Acta Sci. Acad. Petrop. XV. 563. 



8 Trans. Roy. Soc. Edinb. V. 25. 



' Gilbert Annal. XXIV. 363. 



8 Journ. de Phys. 



