笔者对九年义务教育三年制初级中学教科书《物理》第一册中，阿基米德原理演示实验略加改进，效果很好．１实验仪器（如图１）２实验过程 （１）按图１放好仪器，并记录石块未浸入水前两秤的示数Ｇ石和Ｇ桶． （２）观察将石块从开始浸入水中至完全浸没的过程中，Ｆ浮和Ｇ排的? The author of the nine-year compulsory education three-year junior high school textbook “Physics” in the first book, the Archimedes principle demonstration experiment has slightly improved, the effect is very good. 1 experimental equipment (Figure 1) 2 experimental process (1) according to Figure 1 placed the instrument, and record the stone is not immersed in the water before the two scales of the number of G stone and G barrel. (2) Observe the process of immersing the stones in the water until they are completely immersed. F float and G row?