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NEW YORK STATE MUSEUM 



We may consider the following data from the Hudson and 

 Genesee rivers : 



Rainfall, runoff, evaporation and variation from the mean on 

 hudson and genesee rivers 



Hudson river 



Variation Variation Evapo- Variation 



Y«ar Rainfall from mean Runoff from mean ration from mean 



1888 43.92 —1.02 23.64 —0.34 20.28 —0.68 



1889 42.96 —1.98 21.71 —2.27 21.25 +0.20 



1890 50.35 +5.41 28.56 +4.58 21.79 +0.83 



1891 42.96 —1.98 20.56 —3.42 22.40 +1.44 



1892 r 53.87 +8.93 33.08 +9.10 20.79 —0.17 



1893 42.18 —2.76 21.91 —2.07 20.27 —0.60 



1894 41.37 —3.57 19.37 —4.61 22.00 +1.04 



1895 : 36.67 —8.27 17.46 —6.52 19.21 —1.75 



1896 45.21 +0.27 23.63 —0.35 21.58 +0.62 



1897 46.51 +1.57 26.19 +2.21 20.32 —0.64 



1898 48.30 +3.36 27.65 +3.67 20.65 —0.31 



Mean 44.94 —19.58 23.98 —19.58 20.96 —4.24 



+19.54 +19.56 +4.22 



—0.04 —0.02 —0.02 



Genesee river 



Variation Variation Evapo- Variation 



Year Rainfall from mean Runoff from mean ration from mean 



1890 47.54 +7.21 21.22 +7.06 26.32 +0.14 



1891 38.12 —2.21 14.05 —0.11 24.07 —2.11 



1892 41.69 +1.36 15.42 +1.26 26.27 +0.00 



1893 39.30 —1.03 13.35 —0.81 25.95 —0.23 



1894 47.79 +7.46 19.38 +5.22 28.41 +2.23 



1895 31.00 —9.33 6.67 —7.49 24.33 —1.85 



1896 40.68 +0.35 12.80 —1.36 27.88 41.70 



1897 34.39 —5.94 9.38 —4.78 25.01 —1.17 



1898 42.50 +2.17 15.13 +0.97 27.37 +1.19 



Mean .... 40.33 +18.55 14.16 —14.55 26.18 —5.36 



—18.51 +14.51 +5.35 



+0.04 —0.04 —0.01 



