144 
fall is thus less than 6%. So far, then, as the table goes, it 
indicates that there has been a moderate increase in the 
rapidity with which floods rise and a slight increase in the rate 
of their fall, as compared with the rate of their movements in 
a corresponding period thirteen years ago. 
It is impossible from data at hand to determine whether or — 
not the general drainage of the basin has shortened the period 
of high water and extended that of low water with a consider- 
able diminution of volume at low-water stage. The decade prior 
to 1896 seems to have witnessed such a change, as hydrographs 
on Plate VII.show. This diminution is the more marked when 
allowance is made at low-water stages for the 2 feet which the 
dam at LaGrange (completed October 12, 1889) is estimated to 
raise the water on the lower gage at Copperas Creek. The fact 
that the rainfall was deficient during this decade doubtless 
MONTHLY MEANS OF GAGE-READINGS (IN FEET) BELOW COPPERAS CREEK DAM 
1879-1899. 
(Basis of reference, low water of 1873 and 1879.) 
Year | Jan. | Feb.| Mar.'April |May | June| July | Aug./Sept.|Oct.| Nov.| Dec. Vesey 
1879... 2.76 6.20) 8.66 10.80} 5.52] 2.66} 4.53) 2.09] .30|1.03] 2.19] 5.24) 4.33 
1880...| 9.88] 9.83] 9.65/10.15]12.39] 9.90] 7.48] 2.83] 2.90/2.32| 1.69] 1.58) 6.72 
1881...| 1.48] 7.88]14.69'14.72]11.41| 9.01) 4.89] 2.04) 1.22/4.74/10.69/13.88) 8.05 
1882...|12.47| 9.61|13.87/12.43/12.91|14.65|11.64] 6.10] 4.06/3.29] 4.221 5.08] 9.19 
1883...| 6.58/10.01|14.95}12.60/11.85/11.57| 9.43; 5.83] 1.94|2.91] 8.48] 9.63) 8.82 
1884...) 6.58]12.23]13.54]13.55|10.57| 7.57| 6.41] 3.49] 2.82]7.89] 6.22} 6.91) 8.15 
1885... .|13. 12|10. 31/12. 33|13.69]11.12| 7.34] 4.90] 5.04] 6.06/6.68}10.30] 9.07} 9.16 
1886, . .|12.28]/12.67]13.24]12.85]12.37| 8.87| 2.85] 1.78] 2.24/3.13] 2.91| 2.67] 7.32 
1887...| 4.29]13.05|12.48] 7.77] 3.86] 2.40] 1.62] 1.40] 1.83/2.38] 2.09] 3.49] 4.72 
1888...) 6.48] 7.47/12.87|11.75| 7.81|10.18) 8.31] 4.05! 1.86]1.91] 2.85) 2.59! 6.51 
1889...| 4.52] 3.84] 7.18] 6.24| 3.88] 8.81| 8.80) 4.44] 1.30]2.47] 4.10] 6.03) 5.30 
1890... 9.56] 9.31| 8.98]11.24/10.07|10.46] 7.86] 3.17| 2.66)3.16! 3.32] 3.52) 6.92 
1891...| 3.67] 4.08] 8.00]11.94| 9.23|.6.85] 4.73] 3.13] 2.41|1.93| 2.47| 4.24] 5.22 
1892...| 4.58] 5.53} 6.88]11.44/16.46]14.52/13.41| 7.14] 3.31/2.83] 2.90] 3.77) 7-74 
1893...| 3.87] 7.69/14.90/12.60/13.74]10.37| 4.93] I-73] 1.67|/2.42] 2.54] 3.33] 6.63 
1894...| 3.92] 4.29] 9.24] 7.40] 7.29] 4.63] 2.32] 1.99] 4.43/2.96| 2.97] 3.41/ 4.63 
1895...| 3.30] 3.51] 6.28! 5.41] 3.68] 1.88] 3.17] 2.43] 3.42/1.93] 2.20] 6.16) 3.61 
1896... .;10.65| 9.23] 9.79| 7.66] 7.35] 7.73] 4.38] 7-70] 4.66/6.37| 6.10] 5.64] 7.26 
1897... |11.39|11.04]14.09]13.34] 9.52] 5.71| 6.19] 2.36] 1.81/1.76] 2.42] 3.06] 6.86 
1898...] 5.10] 9.31/13.25]14.69|11.49|11.49| 5.50] 3.52] 4.29/4.28] 7.79] 6.92] 8.11 
1899...| 8.47] 7-28]13.07|11.24] 7.86]'7.58] 4.05] 2.71] 2.24]2.54) 3.64] 4.56) 6.27 
Means 
for 21 
years! 6.90| 8.29|11.34]11.11| 9.59] 8.29] 6.06] 3.57! 2.82/3.271 4.38] 5.271 6.74 
