Lead acetate, the boiling point of this thing in ancient times, has been studied by many people. In the past, all the sages went to the alchemy workshop to study it carefully.

At that time, all the craftsmen used pottery kettles to hold lead acetate, and the next one was charcoal fire. The fire is urgent, and everyone is measured, watching the change of its physical state. At the beginning, the kettle was quiet, and soon, it gradually became warm, and the lead acetate moved slightly.

And the fire was slightly blazing, and the bubbles in the kettle were looming, looming, like fish spitting on the bottom of the water. Suddenly, the bubbles gradually increased, and the boiling sound gradually rose, like a stream hitting a stone, and the char can be heard.

Everyone is paying close attention to observe the sign of its boiling point. Or remember the strength of the fire, or record the circulation of the hour, and get an accurate number of time.

After repeated trials, the approximate boiling point of lead acetate is finally obtained. This number is also beneficial for all kinds of usage, and can be used for the refining of Dan sand and the smelting of utensils. Later scholars can also follow this and explore it in detail, in order to seek the best state.