Methods Croton tigiium liquor and rhubarb liquor and mixed liquor of croton tigiium and rhubarb are injected into the rabbit gut to observe the change of the volume depletion of gut.

• 方法：将大黄、巴豆、巴豆和大黄混合液分别注入家兔肠中，观察其肠容量的变化。