ON THE PERIODICITY OF THE AURORA BOREAL1S. 



191 



XXXII. AUKCJIi S OBSERVED AT MONTMORENCI, FRANCE, AKRANGED BY YEARS AND MONTHS. 



War 



1771 



1772 



1773 



1774 



1775 



1776 



1777 



1778 



1779 



1780 



1781 



1782 



1783 



1784 



1785 



1786 



1787 



1788 



1789 



1790-1 



1792 



1793 



1794 



179.3 



1796 



1797 



1798 



1799 



1800-2 



1803 



1804 



1805 



Total 



July 



1 

 1 

 1? 



1 



Aug. 



11 



Sept 



1 



3 

 1 

 3 

 2 

 3 

 1 

 2 

 4 



Dec. 



27 



20 11 



4 

 4 

 3 

 6 

 4 

 7 



16 



12 



17 



8 



16 



7 



13 



5 



■2 



8 



11 



8 



5 







2 



2 



1 



4 







3 



1 



2 







1 



o 



5 I 175 



XXXIII. AURORAS OBSERVED AT FRAXEKER, HOLLAND, ARRANGED BY YEARS AND MONTHS. 



1 



3 



4 



10 



8 

 1 

 6 

 4 

 3 



41 



Apr. 



2 

 2 

 1 

 7 

 2 

 5 



■23 



14 



10 



14 

 23 

 34 

 39 

 21 

 36 

 22 

 27 

 4 

 1 



231 



