(1) The change of height of the capillary wave by the oil film has been measured, “the constant surface area method” being used. The substances tested are palmitic acid, stearic acid, myristic acid, oleic acid, tetradecyl alcohol, and palmitonitrile. (2) The area per molecule of oil has been calculated for which the capillary wave subsides, and this has been compared with the cross sectional area of molecules obtained by other authors. (3) The effect of the change of vibrational number on the subsiding action of wave has been studied. (4) The mechanisms of the subsiding action of oil film on the capillary wave and the breaker have been described.
(1) The change of height of the capillary wave by the oil film has been measured, “the constant oil quantity method” being used. The substances tested are oleic acid, palmitic acid, myristic acid, tetradecyl alcohol, palmitonitrile, lauric acid, tripalmitin, triolein, ricinoleic acid, and ethyl palmitate. (2) It has been found that there occurs some hysteresis phenomena in the subsiding action of the capillary wave by compression and expansion of the film. (3) The areas per molecule of oils have been calculated from the kink point in the expansion curve of the film. (4) Experiments have been done on mastic, the molecular weight of which being estimated at about 3600.