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为了使学生们全能看清楚化学反应中的作用物和生成物,特创制了一种轻便、简单的挂式教具。在1954年上海光明中学及位育中学高三都已经试用过,这教具很受同学们的欢迎,收到了较大的教学效果,能完整地配合反应,并且反应前后变化颜色都很显明,由于它可以悬挂在小黑板上,所以,有充分时间让同学们观察和研究,从而获得较深刻的印象。这教具应用范围也很广,只要在化合时能生成沉淀物或有色物质时都可应用,尤其关于定性分析方式检验离子或化合物的存在反应更为有效。现在把这教具的制造及应用的具体情况介绍于后,希读者同志们提出改进意见;
In order to enable students to fully understand the chemical reactions in the role of objects and products, especially created a portable, simple hanging teaching aids. Shanghai Guangming High School and the third year of high school have been tried in 1954, the teaching aids are very popular with students, received a large teaching effect, can fully cooperate with the reaction, and the reaction before and after the change of color are obvious, because it Can hang on a small blackboard, so, have enough time for students to observe and research, which get a deeper impression. The scope of application of this teaching aids is also very wide, as long as the compound can produce precipitates or colored material can be applied, especially for the qualitative analysis of the presence of ions or compounds more effective response. Now introduce the specific conditions of the manufacture and application of this teaching aids, and hope that the readers will put forward suggestions for improvement.