粘性率と表面張力の同時測定

抄録

With a combination of capillary method for measuring viscosity and drop-weight method for measuring surface tension and with a single capillary, viscosity and surface tension of liquids are simultaneously determined. The capillary and a liquid reservoir connected to the top of the capil-lary with a constantflow head device are placed in a thermostat and the rate of flow is controlled. For determination of viscosity, drops that require shorter time to form, and fordetermination of surface tension, drops that require longer time to form, are collected separately and by weighing them the mass of flow per unit time and the mass per drop are obtained. With nineteen capil-laries of different dimensions, measurements. are made on several sorts of pure liquids and aqueous solutions of glyceline. Variations of viscosity and surface tension of water with temperatureare also examined. The obtained results are in good agreement with the values given in authentic tables.