“虹吸比重瓶” 测定粘性土粒度成份的方法,是我院已故副教授张忠胤于1959年,将移液管法测定粘性土粘度成份的原理,与比重瓶蒸馏水法测定土粒比重的原理相结合,创立了本法的原理与方法。我们在原有基础上作了改进设计。文中叙述了该法的原理和优点,通过17组试样的对比试验资料,用相关分析与回归分析,论证了该法的精确性。 “Siphon Gravity Bottle” The method for determining the clay particle size was based on the principle of the pipette method for determining the viscous soil viscosity and the principle of measuring the specific gravity of the clay with distilled water method. The principles and methods of this Law were created. We have made improvements on the original basis. The principle and advantages of the method are described in this paper. The accuracy of the method is demonstrated by the comparative analysis and regression analysis of the 17 sets of samples.