本刊1980年第1辑《关于萘熔解曲线的实验》一文的[编者按]指出:“这些演示实验的可见度较差,希望能在提高这类实验的可见度方面进行交流.”我们认为,这类演示实验的可见度之所以较差,主要在于温度计上的刻度太小.由于正对温度计刻度的后面有一个不透明的白色底板,这就造成了利用透射式幻灯机对 The Editor’s Note of the article “Experiment on the Naphthalene Melting Curve” in the first issue of the 1980 issue of the journal pointed out: “These demonstrations have poor visibility and we hope to exchange ideas for improving the visibility of these experiments.” The poor visibility of such demonstration experiments is mainly due to the fact that the scale on the thermometer is too small. Due to the opaque white floor behind the thermometer scale, this results in the use of transmissive slide projectors.