The figures given in the last column of the table are computed from the absolute dry weights of the upper three feet of soil as determined in a locality some rods from the place of experiment, and are therefore only approximations, but the error due to this cause is certainly small. It will be seen that while only two pounds of water to the square foot were added to the surface, the upper six inches contained 2.87 pounds per square foot more than before the water was added, and the second six inches contained 0.199 pound more, and this too in the face of the fact that the evaporation per square foot from a tray sitting on a pair of scales close by, was 0.428 pound during the interval under consideration. Similar experiments were made by taking the samples of soil at 5.30 P. M. in one-foot sections down to four feet, at four equally distant places along the diagonal of a square, six by six feet, and having the ground sprinkled. At the same time four similar sets of samples were taken on lines vertical to each of the sides of the square but four feet distant from them. The amount of water the soil contained was then determined, and at 11.30 A. M., nineteen hours later, another series of samples was taken at points about four inches distant from the last and the amount of water determined with the result given below. TRANSLATION OF WATER OCCASIONED BY WETTING THE SURFACE. ─────────────┬─────────────────────────────────────────────────────── Depth of │ samples. │ WET AREA. ─────────────┼───────────────────────────╥─────────────────────────── „ │ Before wetting. ║ After wetting. ─────────────┼─────────────┬─────────────╫─────────────┬───────────── „ │ │ Pounds of ║ │ Pounds of │ Per cent of │ water per ║ Per cent of │ water per │ water. │ cubic foot. ║ water. │ cubic foot. ─────────────┼─────────────┼─────────────╫─────────────┼───────────── 0–12 inches │ 16.86│ 11.78║ 20.15│ 14.06 12–24 „ │ 17.76│ 15.79║ 19.71│ 17.52 24–36 „ │ 16.76│ 14.73║ 17.72│ 15.58 36–48 „ │ 15.01│ 14.03║ 16.47│ 15.40 ─────────────┼─────────────┼─────────────╫─────────────┼───────────── Averages │ 16.59│ 14.08║ 18.51│ 15.64 │ │ ║ │ Total amount │ │ ║ │ of water │ │ 56.33║ │ 62.56 Amount of │ │ ║ │ change │ │ ║ │ +6.23 ─────────────┴─────────────┴─────────────╨─────────────┴─────────────