Semi-Centennial Volume. 



121 



Trans. Kansas Acad. Sci., Vol. XXIX. 



PLATE VI. 



p /O 'S 20 2S 30 /9I7 



Fic. 5. Evaporation curve for Mnrch, 1917. 



PLATE VII. 



loo 



200 



4br i 5 10 IS AO -tr jO i<in 



Fig. 6. Evaporalion curve for .\pril, 101' 



