No. 1. Water absorbed after twenty days 106.44 per cent „ 2. „ „ „ „ „ 105.98 „ „ „ 3. „ „ „ „ „ 106.56 „ „ „ 4. „ „ „ „ „ 106.52 „ „ „ 5. „ „ „ „ „ 106.38 „ „ —————— Mean 106.38 „ „ No. 1. Water absorbed after thirty days 108.35 per cent „ 2. „ „ „ „ „ 107.60 „ „ „ 3. „ „ „ „ „ 108.32 „ „ „ 4. „ „ „ „ „ 107.86 „ „ „ 5. „ „ „ „ „ 107.87 „ „ —————— Mean 108.00 „ „ The data obtained show that there was a very slight increase in the amount of moisture absorbed after the tenth day. As will be seen, however, from the following data, the soil within the cylinder does not contain in all parts the same percentage of moisture, the lower portions of the cylinder containing notably larger proportions than the upper parts. The cylindrical soil column was divided into four equal parts and the moisture determined in each part. Beginning with the top quarter the percentages of moisture were as follows: First quarter 97.52 per cent Second „ 105.91 „ „ Third „ 112.83 „ „ Fourth „ 116.48 „ „ =146. Method of Petermann.=[103]—The method of Wolff as practiced by the Belgian Experiment Station, at Gembloux, is essentially the same as described above. Petermann recommends the use of tared cylinders twenty to twenty-five centimeters long and six to eight centimeters in diameter. The cylinder is to be filled with the fine earth, little by little, with gentle tapping after each addition. The bottom of the cylinder is closed with a perforated rubber stopper on which is spread a moistened disk of linen. The cylinder, thus prepared and filled, is weighed and afterwards placed in a vessel containing distilled water, to such a depth as to secure a water level about two centimeters above the lower surface of the soil in the cylinder. The level of the water is kept constant as the contents of the cylinder are moistened by capillarity. When the earth appears to be thoroughly moistened, as can be told by the appearance of the upper surface, maintain the contact with water for about five or six hours. The cylinder is then removed, the upper surface covered to avoid evaporation, allowed to drain for a few hours, wiped and weighed. The cylinder is again placed in water to see if any increase in weight takes place. The weight of the fine earth and of the absorbed water being known, the percentage of absorption is easily calculated.