308 



DISCUSSION OF THE SECULAR VARIATION 



173° 

 1731 

 173- 

 1733 

 1734 

 1735 

 1736 

 1737 

 1738 

 1739 

 1740 

 1741 

 1742 

 1743 

 1744 

 1745 

 1746 



1747 

 1748 

 1749 

 1750 

 1751 

 1752 



1753 

 1754 

 1755 

 1756 

 1757 

 1758 

 1759 

 1760 

 1761 

 1762 



1763 

 1764 

 176s 

 1766 

 1767 

 176S 

 1769 

 1770 



•771 

 1772 



1773 

 1774 

 1775 

 1776 



1777 

 1778 

 1779 

 1780 

 1781 

 17S2 

 17S3 

 17S4 

 1785 

 17S6 

 17S7 

 1788 

 17S9 

 1790 

 1791 

 1792 

 1793 

 1794 

 1795 



Charleston, 

 S. C. 



C. III. 4th or. 



63-9 

 64.7 



64-6 

 66.3 

 66.9 

 66.4 

 67.4 

 63.2 

 66.6 

 65-3 

 63-9 

 64.7 



64.9 



S.-ivcinnah, Ga 

 C. IV. 4th or 



Fort Brooke, 

 Fla. 



C. I. 4th or. 



Cincinnati, 

 Ohio. 



C. IV. 4th or. 



Fort Snelling 

 Minn. 



C. II. 4th or 



66.0 

 66.5 

 66.S 

 65. o 

 65.5 

 65-3 

 65.1 

 64.5 



Muscatine, 

 Iowa. 



C. II. 4th or. 



St. Louis, Mo. 



C. II. 4th or. 



1797 



