SOIL FROM GARDEN OF EXPERIMENT STATION. │ │ Beaker Method. │ ——————————————————————————————————————— Berlin-Schöne,│ Boiled Pestled, not Not boiled boiled │ twenty-three boiled. nor pestled, forty-five │hours, average average of minutes. │ of four three │ analyses. analyses. │ Above 0.25 49.37│ 47.77 48.82 48.82 millimeter │ 0.25–0.05 21.39│ 20.75 22.44 22.37 millimeter │ 0.05–0.01 12.53│ 11.18 12.55 13.70 millimeter │ <0.01 clay 9.38│ 13.47 9.36 8.28 included │ Loss on 6.83│ 6.83 6.83 6.83 ignition │ ───────────────────────────┼─────────────────────────────────────────── 99.50│ 100.00 100.00 100.00 Osborne concludes from the above facts that the Berlin-Schöne method, while showing close agreement with the beaker method, does not give results which are identical with that method. On subjecting portions separated by the Berlin-Schöne method to the beaker analysis additional separations were secured. In the case of heavy loams the inability of the Berlin-Schöne method to effect even a rough or approximate separation of the several grades becomes very conspicuous. =222. Method of Hilgard.=—Two important principles lie at the foundation of this method; _viz._, 1, the use only of separating vessels of true cylindrical shape and 2, the employment of a mechanical stirrer to break up the floccules formed during the process of separation. The points in the apparatus to be considered are uniformity of the cross section of the elutriator at every point, exact perpendicularity of position, careful control of the rate of flow and continuous operation of the mechanical stirrer. According to Hilgard’s observations the stirring due to the current of water alone is not sufficient to break up the floccules unavoidably formed during the separation, while any inclination of the sides of the elutriating vessel from the perpendicular due either to a conical shape or false position favors in the highest degree the formation of floccules due to reflex currents formed in the body of the liquid.