OF THE MAGNETIC FORCE. 



41 



Normals of the Vertical Force for February. j 



Year. 



0" 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11" 



1841 

 1842 

 1843 

 1844 

 1845 



664 

 706 



734 

 700 



729 

 756 



664 

 701 



725 

 752 



726 

 757 



662 

 713 



729 

 759 



728 

 760 



656 

 721 



729 

 763 



730 

 764 



654 

 699 



723 



756 



724 

 756 



650 

 698 



722 

 752 



717 

 749 



Means 



718 





711 





716 





717 





709 





705 





1 



Noon 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23" 



Min. 



644 

 709 



718 

 747 



716 

 741 



648 

 692 

 (697) 

 716 

 740 



720 

 744 



647 

 698 



727 

 753 



731 



759 



673 

 712 



738 

 761 



739 

 761 



668 

 723 



740 

 758 



737 

 753 



665 

 710 



735 

 752 



733 



756 



+ 17 

 + 17J 

 +17 

 +23^ 

 +23^ 



704 





700 





706 





720 





722 





716 





+20.4 









Normals of the Vertical 



Force for March. 









Year. 



0" 



1 



2 3 



4 



5 



6 



1 



8 



9 



10 



11" 



1841 



670 





661 





661 





655 





651 





645 





1842 



655 





643 





654 





663 





657 





661 





1843 



























1844 



768 



761 



763 



760 



764 



762 



765 



762 



758 



761 



762 



764 



1845 



749 



741 



736 



742 



746 



748 



749 



746 



736 



733 



732 



729 



Means 



709 





701 





705 





707 





701 





700 





Noon 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23" 



Min. 



643 





646 





656 





665 





666 





673 





+17 



651 





650 

 (686) 





657 





668 





673 





665 





+17 



762 



753 



758 



760 



754 



757 



753 



754 



752 



753 



763. 



764 



+23^ 



729 



729 



713 



734 



740 



747 



751 



746 



741 



740 



739 



743 



+23| 



696 





694 





703 





709 





708 





710 





+20.4 



