146 



Fluctuations at Copperas Creek. 



♦Minimum levels reached in two different months in 1887 and in 1892, and in three 

 in 1897. 



more than 8 feet above low water — whose duration has aver- 

 aged 132 days, ranging from 11 days in 1895 to 230 in 1883. The 

 average seasonal position of this period is from February to 

 June, inclusive, though portions of it have occurred in every 

 month of the year but September. In some cases it begins with 

 the autumnal rains in October or November and continues 

 throughout the winter, as in 1881 and 1889, though in some in- 

 stances this early autumnal rise is followed by a sharp and con- 



