186 



ON THE PERIODICITY OF THE AURORA BOh KALIS. 



ST. PETERSBURG, Continued. 



T== 



Year 



177:; 

 177-1 

 1775 

 1 7 7 < ; 



1777 

 1778 



177'.> 

 17.su 

 I7.S1 



17.S2 



1783 

 1784 

 1 785 



178ii 



17s7 



1 788 



1789 



1790 



17'.)1 



1792 



1793 



L794 



1795 



1796 



1797 



1798 



1799 



1802 



1 804 



1805 



1806 



1808 



1809-23 



1 82 1 



1825 



1826 



1827 



1828 



1830 



1831 



1832 



1833 



1834 



1836 



1837 



1838 



1841 



1842 



1843 



1844 



1845-6 



•_> 

 3 

 1 



1 

 4 



1 



2 



2 



4 



1 

 7 



4 

 2 



6 

 •> 



Mar. 



4 

 4 

 4 

 1 

 6 

 5 

 5 

 2 

 3 

 3 

 3 

 1 

 2 



12 

 3 

 1 

 2 



Apr. 



May 



3 

 11 

 5 

 1 

 8 

 4 

 6 

 1 

 8 

 4 

 5 

 1 

 2 

 8 

 3 



3 

 4 



1 



July 



32 

 46 



23 



12 



26 



31 



37 



19 



29 



30 



17 



7 



14 



40 



10 



10 



15 



4 







2 



2 



2 



2 



1 



1 







1 



1 



3 



1 



1 



1 







2 



1 





 2 

 1 

 12 

 5 

 1 

 4 

 2 

 1 

 2 

 2 

 4 

 40 

 10 

 9 

 



