The medical concubine said: Evil king, please go to bed

As for Gu Yan, it is impossible not to feel the curiosity in their eyes at all, but obviously she does not intend to explain it to the two of them, not to mention how troublesome it is to explain the purification, even if it is not troublesome, she will not It was necessary to explain this to two people.

This is where Gu Yan is more satisfied with this world. At least here, except for Chu Yu, she doesn't have to explain anything to anyone. Otherwise, if everyone explains these things to them, she doesn't have to do other things directly. I don't know how long it will take to explain these things one by one.

As for the matter of purification and even the glass in the future, Gu Yan never thought of hiding it from Chu Yu. She knew very well that without Chu Yu's help in this matter, no matter how capable she was, she would not be able to make a microscope.

The water in the pot was still bubbling. Gu Yan used an iron spoon to stir the pot from time to time. Zhu Yunjuanbi wanted to come forward to help, but she refused. Evaporating at high temperature is something she can do in this era. There is no guarantee that it will be successful, let alone a native who doesn't know anything, at least she knows about the temperature at which the residual sodium chloride in the salt can evaporate.

Seeing Zhuyun, she could only give up. She offered to help because of her duty. She is Gu Yan's servant, and serving her is what she should do. What the hell is the princess doing.

It's just that the princess refused. Couldn't outsiders know what the princess made?Zhu Yun couldn't help guessing, and soon had a plan in mind.

Compared with Zhu Yun's quick-witted mind, Juan Bi is obviously much slower. Although Gu Yan also rejected her request for help, she didn't think much about it at all. She still looked at Gu Yan's movements curiously, with a look of As if she wanted to see something, Gu Yan let her do it, she didn't think Juan Bi could see anything, not to mention that even if she really saw something, it was her ability.

With the passage of time, several piles of firewood have been burned, and the water in the pot has become less and less, and it has become more and more chaotic. Gu Yan then asked Juanbi to lower the fire, but continued to stir in the pot. Her expression also became more and more cautious, and her attitude also affected the two maids beside her. They couldn't help holding their breath, watching her stir wholeheartedly.

After a long time, Zhu Yunjuanbi's neck became sore, and finally there was no water in the pot, but a white particle appeared in front of their eyes.

Obviously what was put in was salt, but now something else appeared!

Zhu Yunjuanbi looked at the particles in the pot with surprise, but couldn't figure out how Gu Yan did it.

"Princess, what is this?" Finally, Zhu Yun couldn't help but asked Gu Yan beside her. Although she didn't intend that Gu Yan would tell her about it, she was really curious. After living for so many years, she still This is the first time I have seen this strange phenomenon.

"Some useless things" Compared to the curiosity and surprise of the two, Gu Yan seemed a little disappointed.

Sodium carbonate is a white crystal. Even if it needs to be cooled at a low temperature later, it is obviously not like this. This thing is not soda ash.

Obviously - the high temperature evaporation method failed this time.

Although she could have predicted this situation from the beginning, and without professional equipment, it was impossible for her to purify it successfully in one go, but when it actually happened, Gu Yan found herself still disappointed.

This was the first time she failed an experiment. It turned out that when she was in the military academy, she could easily handle no matter how difficult the experiment was, and never failed, let alone such a simple experiment as high-temperature purification.

So at this moment, the loss can't be concealed. This is the first time that Gu Yan truly feels that she is no longer the former Hua Guo poison doctor Gu Yan, but a boudoir lady without any power in Donglin Country.

Weak enough to be stumped by an experiment she once scoffed at.

But Gu Yan is not an ordinary person after all, no matter how lost she is, she quickly adjusts her mentality and develops a new fighting spirit.

Who is she? She is Gu Yan. Even if she is trapped in this era, she can still live her own life. She doesn't believe that she can't do this well.

At that moment, Zhu Yun saw her princess's misty eyes became abnormally bright, shining so brightly in the dark kitchen.

Only then did I let go of my uneasy heart.

She just thought that the princess was angry because of what she said just now.

After sorting out her mood, Gu Yan turned around and ordered Zhuyun to get out the white particles in the pot, and asked Juanbi to fetch water, and started her experiment again.

If you don't do it once, you can do it twice.Regardless, she believes she can succeed.

So when she failed again for the second time, Gu Yan was able to calmly face her own failure, at least this time it was better than the last time, and the particles were also more crystal clear than last time.

I don't know how long it has passed, but all I know is that there is only a thin layer of firewood left in the kitchen, the water in the water tank has also disappeared, candle tears are all over the counter, and Gu Yan is still stirring in the pot with.

The water vapor gradually dries up, and in the slowly diminishing fire, the salt evaporated by the high temperature finally ushers in its new appearance.

The light white lens is so dazzling under the light.

That is the prototype of soda ash. As long as this thing is cooled to a low temperature later, real soda ash can be produced.As for low-temperature cooling, there is an ice room in the palace, just put things in it.

Soda ash, the academic name is sodium carbonate, and sodium carbonate has a very strong washing function. It can wash out the turbidity in the glass liquid fired at high temperature, so that the manufactured glass is more transparent. Without the presence of soda ash, the glass will It's just ordinary glass without any other use, so for Gu Yan who wants to use glass to make lenses, ordinary glass is obviously impossible.

This is why she must create soda ash.

"Successful! I succeeded!" At that moment, even a small oval face was flushed red due to the high temperature, and crystal sweat dripped down its cheeks from time to time, and the whole person looked a little embarrassed, but it was not enough The eyes, like a rainbow blooming, revealed endless streams of light, and joy was about to overflow the eye sockets.

Huang Tian paid off, she finally succeeded in extracting the sodium chloride from the salt at high temperature.

The joy of success made Gu Yan ready to fight again, and Zhu Yun's heart skipped a beat when she saw this, the princess must continue!

Thinking of this, she couldn't help but stepped forward and said, "Princess, it's getting so late, you should rest first, since this thing has been successful, it won't be too late to continue tomorrow."

It was only now that Gu Yan saw that the darkness outside the window was about to fall, and because of the time, it was quiet, only the occasional animal cry, it was indeed a bit late, but she had just succeeded, and it shouldn't cost much to practice her hands again It's time.

"What's more, there are no materials now, and new firewood will be brought in from the house tomorrow morning." Just as she was about to speak, Gu Yan realized this after hearing this sentence. The kitchen was indeed out of water and firewood.

So Gu Yan could only give up the idea of ​​doing it again, and went back to the bedroom.

Waiting for the arrival of the next day.

……