The Making of Ammonium Crystals
In the past, there were wise men who lived in the mountains and forests. In the hot summer, the heat was unbearable, and the wise man wanted a way to relieve the heat and make useful things.

One day, the wise man dug fertile soil next to his house, inspected it carefully, and found that it contained alkali. He took the sour fruits from the garden, juiced them and kept them.

The wise man set up a kettle on the stove, poured water into it, poured the fertile soil into it, stirred it well, boiled for a while, and then let it stand. Wait for it to settle, take the supernatant. Then slowly drip the juice of the sour fruits into the clear liquid, stirring while dripping, and see a slight foam.

A few days later, the wise man moved the kettle to a cool place to slowly cool it down. In Russia, there were fine crystals at the bottom of the kettle, shining brightly. The Magi knew that this was Ammonium Acetate Crystals.

This crystal was ready, and the Magi was very happy. Put it on the desk, and the heat was slightly reduced; try it as medicine, and it has a moderate effect. From then on, the Magi often made this ammonium crystal, and the neighbors praised its ability.