用华氏平衡锥来测定土壤的液限(流限),是目前各试验单位普遍采用的一种方法。因为华氏仪构造简单,易于达到标准化。但是,对于一个操作不熟练的人来说,这种仪器仍然有某些缺点,因为按操作规程的要求是手执平衡锥,当锥尖接触土面时,松开手指,借其自重沉入土体内1公分时,测定这时候的含水量为液性限度。根据我们的观察和体会,操作时手指放开的快慢或有抖动,都会影响到锥体沉入土中的深 Fahrenheit balance cone to determine the liquid limit (flow limit), is now a commonly used test units a method. Because of the simple structure of the Fahrenheit, it is easy to achieve standardization. However, this instrument still has some drawbacks for an unskilled person, as it is the practice to balance the cone by hand and when the cone tip touches the soil, it releases its finger and sinks by its own weight Soil 1 cm, the measured water content at this time for the liquid limit. According to our observation and experience, the speed of finger release during operation or jitter, will affect the depth of the cone sinking into the earth