在高中二年級物理教学中,关于飽和汽性质的实驗,是最困难的实驗之一。利用通常的托里拆利管做这个实驗,需要有大量的水銀,一般学校都难以解决。利用玻意耳管做这个实驗,困难也很多,特別是在水银柱面上加了一种試驗液体(例如酒精)以后,不易把这种液体除淨,再用其他液体(例如水或乙醚)做实驗时,效果就不好了。达对于在同一节課上做几个实驗,特别是接連着在几个班上做实驗,影响是很大的。为了克服上述困难,我们在教学中做了另一种装置,这种装置构造很简单,需要水銀少,实驗操作方便,效果也比較良好。这个装置曾在1958 In high school sophomore physics teaching, experiments on the properties of saturated steam are one of the most difficult experiments. Using the usual Tori Toli tube to do this experiment, need a lot of mercury, the general school are difficult to solve. It is very difficult to do this experiment with Bose tube. Especially after adding a test liquid (such as alcohol) to the mercury cylinder, it is not easy to remove the liquid and then use other liquids (such as water or ether) When doing the experiment, the effect is not good. The impact is great for doing a few experiments in the same class, especially after experimenting in several classes. In order to overcome the above difficulties, we made another device in teaching. The device is simple in structure, requires less mercury, has convenient operation and has good effect. This device was in 1958