OF THE MAGNETIC FORCE. 



39 



Normals of the Vertical Force for October. | 



Year. 



0" 



1 



2 



8 



4 



5 



6 



7 



' 



9 



10 



ll" 



1841 

 1842 

 1843 

 1844 



579 

 706 

 714 

 775 



578 



698 



710 707 



771 769 



713 

 773 



573 

 702 

 712 

 776 



714 

 779 



568 

 714 

 717 



780 



714 



780 



558 

 695 

 706 

 774 



704 

 773 



556 

 708 

 703 

 773 



701. 

 770 



'Means. 



694 





689 





691 





694 





684 





685 





1 



Noon 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23" 



Min. 



661 

 707 

 702 

 769 



700 

 766 



562 

 706 

 703 

 773 



701 



777 



571 

 706 

 704 

 786 



709 

 788 



677 

 708 

 714 

 791 



717 

 789 



581 

 710 

 719 

 785 



715 



785 



583 

 709 

 714 

 781 



717 

 781 



+17J 

 + 23 J 

 +23i 



685. 





685 





692 





697 





699 





697 





+20.4 



Normals of the Vertical Force for November. 



Year. 



0i> 



1 2 



3 



4 



5 



6 



7 



8 



9 



10 



11" 



1841 

 1842 

 1843 

 1844 



532 

 717 

 742 

 775 



740 

 772 



537 

 713 

 745 

 768 



743 

 769 



538 

 723 

 745 

 772 



744 

 771 



533 



725 

 744 

 770 



748 

 773 



526 

 712 

 742 

 768 



739 



772 



523 

 715 



737 



772 



729 

 767 



Means 



691 





691 





694 





693 





688 





686 





1 



Noon. 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23"' 



Min. 



520 

 711 

 735 

 766 



731 

 763 



521 

 713 

 731 

 762 



738 

 765 



526 

 716 

 746 

 774 



749 

 779 



529 

 712 



749 



777 



751 

 778 



531 

 718 

 749 



774 



747 

 770 



538 

 718 

 746 

 769 



748 

 772 



+ 17 

 +17J 

 +23i 

 +23i 



682 





683 





690 





692 





693 





693 





+20.4 



' Let m equal any reading at an even hour in 1843 or 1844, mp and mf the same for the odd hours preceding 



and following, then mean for the even hour J (m + 



ip + mf. 



) which was substituted for the above value at the 



even hour in 1843 and 1844 before the general mean of the four years was taken. 

 6 



