FLUCTUATIONS OF LEVEL 



TABLE OF WATER LEVELS 



All the measuremeuts reduced to one expression, which is the depth 



MONTHLY AVERAGE. 



Jan. Feb. March. April. May. June. July. Augr Sept. Oct. Nov. Deo, 



1788 to 

 1790 

 1796 

 1797 



1798 

 1800 

 1801 

 1802 

 1806 

 1809 

 1810 

 1811 



1812 



1813 



1814 

 1815 

 1816 

 1819 



1820 

 1821 

 1822 

 1823 

 1824 

 1825 

 1826 

 1827 

 1828 

 1829 

 1830 

 1831 

 1832 

 1833 

 1834 

 1835 

 1836 

 1837 

 1838 



1839 

 1840 



1842 

 1843 

 1844 



1845 

 1846 



1847 



1848 

 1849 



1850 



1851 



1852 

 1853 



1856 

 1857 



Mean 



7.74 

 6.92 



6.68 

 8.99 



7.88 

 7.49 

 8.35 

 9.56 



7.86 



8.07 

 9.40 



8.42 

 9.49 



8.33 



7.04 



7.30 



9.47 

 10.07 



8.78 



9.50 



8.37 



10.33 



6.95 

 {9..50) 

 9.50 

 8.96 

 9.21 



(9.30) 

 8.26 



8.80 

 8.46 

 8.07 

 9.40 

 8.96 



10.07 

 10.15 



6.30 



7.30 



8.82 

 8.57 

 9.82 

 8.S2 

 11.40) 



9.83 



8.42 



(10.90) 



7.15 

 9.24 



(8.57) 



9.34 



(9.49) 



(10.30) 



10.08 

 (8.60) 

 10.33 



(8.57 



(9.46) 



9.46 



10.20 



(10.15) 



9.40 



6.30 

 6.30 



9.82 

 (10.07) 

 10.64 

 (11.40) 



10.13 



(7.99) 

 8.30 



8.71 

 8.34 



9.34 

 (9.49) 

 9.97 



10.10 

 11.16 



9.33 

 8.11 

 9.30 



9.07 

 9.15 

 9.61 



9.89 

 10.41 



(10.30) 

 8.04 

 9.10 



6.86 

 6.87 



8..50 

 8.94 



0.13 

 8.99 

 9.35 



9.31 

 7.84 



0.85 



9.21 

 8.74 

 9.10 



8.30 

 9.32 



9.46 

 9.40 



7.61 

 6.97 



8.50 

 9.07 



7.90 

 9.32 



of 

 level. 



1.94 

 2.09 



2.56 

 1.68 



1.34 

 1.66 



1..58 

 2.00 

 2.23 



