"The Book of Chemical Refrigerators"

In ancient times, the goodness was used to refrigerate, and there was a device made by a strange technique, called "Chemical Refrigerator". The wonder of this device can make the summer moon cool, just like the cool autumn environment.

This device is based on the principle of chemistry and is made of all kinds of wonderful things. All things are in harmony, and their properties are mutually controlled, so cold air is generated. When placed in various rooms, the cool air will overflow, and the heat will disappear.

Or: "Why did this device do it?" Cover with several kinds of medicinal stones and prepare them in a delicate way. When one thing encounters water, the temperature drops, and when it merges with other things, it can condense water into ice. Although the sun is scorching in the sky, the ice does not melt quickly.

The craftsman made this device with good intentions. Observe the nature of various things, examine the change of yin and yang, and then make the device exquisite. The Chemical Refrigerator made by different sizes can make the whole room cool, and the small one can also protect the treasures in the cold.

And the use of this device does not stop the heat. For doctors, good medicine can be stored to prevent it from being damaged by heat; for Fangjia, it can hide rare materials and keep its taste unchanged.

Sad! The wisdom of the ancients was able to use chemical methods to create this refrigeration artifact, which is really beneficial to the world and amazed future generations.