============================================== | | |Per cent MONTHS. | Rain. |Filtration.| | | |filtered. -------------+---------+-----------+---------- |_Inches._| _Inches._ | | | | January | 1.84 | 1.30 | 70.7 February | 1.79 | 1.54 | 78.4 March | 1.61 | 1.08 | 66.6 April | 1.45 | 0.30 | 21.0 May | 1.85 | 0.11 | 5.8 June | 2.21 | 0.04 | 1.7 July | 2.28 | 0.04 | 1.8 August | 2.42 | 0.03 | 1.4 September | 2.64 | 0.37 | 13.9 October | 2.82 | 1.40 | 49.5 November | 3.83 | 3.26 | 84.9 December | 1.64 | 1.80 | 110.0 ============================================== "The filtration from April to September is very small--practically nothing; but during those months we have 12.67 inches of rain--that is, we have two inches a month for evaporation besides the quantity in the earth on the first day of April. From October to March we have 10.39 inches filtered out of 13.95 inches, the whole fall. 'Of this Winter portion of 10.39, we must allow at least six inches for floods running away at the time of the rain, and then we have only 4.39 inches left for the supply of rivers and wells.' (Breadmore, p. 34.)