Apeil 17, 189G.] 



SCIENCE. 



581 



May 

 Jan. 

 Apr. 

 Nov. 

 May 

 Jan. 

 Aug. 

 Feb. 

 Mar. 



Apr. 



May 

 Apr. 

 Mar. 

 Feb. 

 Apr. 

 Mar. 



1850 20.8 



1851 14.5 



1852 23.1 



1853 20.5 



1854 29.8 



1855 15.0 



1856 23.3 



1857 19.5 



1858 12.3 



1859 26.4 



1860 16.0 



1861 21.5 



1862 28.7 



1863 15.0 



1864 17.3 



1865 24.8 



1866 20.5 



1867 20.0 



1868 21.5 



Mar. 

 Dec. 

 May 

 Apr. 



Apr. 



May 

 Apr. 

 May 

 Nov. 

 Oct. 

 Apr. 

 Jan. 

 May 

 Apr. 



1877 22.6 



1878 23.7 



1879 21.4 



1880 14.9 



1881 16.3 



1882 14.8 



1883 20.5 



1884 21.5 



1885 18.2 



1886 21.8 



1887 22.1 



1888 23.1 



1889 15.7 



1890 16.3 



1891 19.5 



1892 18.3 



1893 24.0 



1894 13.8 



1895 25.7 



Fre^iet.irelQht3 in, CoTiTieeltcuZ River T^ffart/brd. Gauge. * 



Averaged for successive periods these 

 give : 

 1841-49 Average height 20.6 (1842 missing. ) 



An examination of these figures and of a 

 graphical representation of the yearly- 

 freshet heights discloses, it seems to me, no 

 permanent change. The highest freshet 

 was in 1854, the lowest in 1858, and only 

 iwice has the height of 27.7 feet attained 

 in 1801 been exceeded. Apparently there 

 was a gradual increase in the average height 

 down to 1880, while at the same time there 

 was a marked and steady decrease from 

 1854 to 1880 in the heights of the more ex- 

 treme freshets. 



In considering the dry weather discharge 

 of the river I have taken as a basis for com- 

 parison the average flow for the lowest con- 

 secutive period of four weeks in each year, 

 for which I find the following figures, which 

 have also been plotted to scale : 



Il€irt/brrd.\-'_ Hotydke^. 



^ ow Water Klow in, OynnecltcutJltyer . 



