Xu Yue eased her tense nerves for a while, and then continued to answer Zheng Sanhao's question.

"Extracting nitric acid is not simple, where do your raw materials come from? What tools are used for purification? Xu Yue asked.

Zheng Sanhao replied: "Part of it is nitrate ore, part of it is extracted from horse urine and pig dung, and the utensils in the laboratory are too precious, so I thought about it later, so I replaced it with an iron pot and a clay pot, and the effect is just as good!" ”

Xu Yue was taken aback again, "So, you've already tried successfully?" ”

Zheng San nodded embarrassedly, she had indeed succeeded, but because there were not many raw materials for nitrate, there was only a little bit.

Xu Yue looked at Xu Fubao again, if it was before, she would never have thought that this mathematical genius would be involved in the production of explosives.

And, in this small team, she seems to be the same core figure as Zheng Sanhao.

"Chief, I have drawn the kinetic energy image of the explosion of the black powder powder, and I found that the black powder only has two simple directions of the explosion point, but the formula I learned in class before told me that there are actually multiple points on the coordinate axis......."

Fu Bao began to talk to Xu Yue about her discovery with great interest.

Facts have proved that she used the mathematical formulas she had learned to reverse that there was a more powerful explosion method than black medicine powder, thus giving Zheng Sanhao the correct research direction.

This is beyond the scope that ordinary people can understand, even the top genius of the era like Sima Yi, because he has not systematically studied Xu Jiajun's mathematics, his eyes gradually reveal confusion.

In the end, only Xu Yue could keep up with Fu Bao's thinking and know what she was trying to say.

Fu Bao said seriously: "The leader always says that we are stepping on the shoulders of giants to see the world, and wants us to combine what we have learned with all aspects of the real world. ”

"But now I've found that after using the formula to reverse deduce, what we have learned is actually partially incomplete, is this not there in the first place, or is it hidden?"

Hearing this, Xu Yue's mind was already full of screens: hastily and hastily!

Of course, she hid a lot of things, such as electricity, such as steam, chemical formulas that could make thermal weapons, and many, many things that were too far ahead of her time.

But now, looking at the appearance of black powder, Xu Yue felt that she might really have to change the textbook again.

That dangerous and mysterious part, it is precisely because it is extremely dangerous that she deliberately hides it.

But now that they have been dug up by the students themselves, it is impossible for her to make the students take another risk and make the same sacrifice as the giants, since she has the right formula.

But before that, she needs to be quiet!

"Let's go eat first, your group has suspended the research on black medicine powder in the past few days, this thing is even more dangerous than you imagined!"

After leaving this warning, ignoring the lost gaze of Fu Bao and the others, Xu Yue decisively slipped away.

She feared that if she stayed any longer, she would expose the cruel reality that she could not cope with the students' questioning.

Xu Dalang beckoned to the guards in the village and took away all the messy utensils of the students.

took people to Zheng Sanhao's house and sealed the iron pots and jars in her backyard.

The students looked anxious and wanted to explain something, but they were frightened away by Xu Dalang's cold eyes.

At this time, they didn't know that the reason why Xu Dalang did this was just to obey Xu Yue's orders and protect their fragile little life.

No one knows explosives better than Xu Dalang.

He is a dignified zombie king, but he was blown up by this thing and there is not even scum left!

The group of students Fu Bao and Zheng Sanhao are really just lucky, after all, a small amount of black powder will only blow people up, not kill people.

But if the number is doubled, it will be difficult to say.......

Xu Yue locked herself in a small black house, and it wasn't until Xu Erniang took the twins back to Yuyang in a carriage that she opened a crack in the door and let her sister in.

"I've heard about black powder."

As soon as Xu Erniang entered the door, she went straight to the point.

"You don't know if you want the students to keep doing it, do you?"

Xu Erniang sat down cross-legged opposite Xu Yue, and stretched out her hand to let Xu Yue take out a can of Coke and give herself a taste.

Xu Yue took out the coke, poured half a can for her sister, kept half a can for herself, took a big sip first, and burped contentedly.

The worries of the past few days have also been dissipated with this hiccups.

The tech tree doesn't let her break the balance, but this balance is not broken by her, and it can't be counted on her head!

"Sister, what do you think?"

Xu Erniang said with a smile: "I think you are too worried, explosives are not so easy to make, if you want to use them on a large scale, how many raw materials do you need?" ”

"Don't say anything else, it's just saltpeter that is hard to find, this amount, let them toss it."

Xu Erniang looked very open, "Get it out for our own use, coal mining, limestone mining or something, if there is explosives blasting, the output can be increased several times compared to now." ”

Xu Yue stayed in the small black house for a few days, and of course she also thought about these benefits.

But......

"Zheng Sanhao said that she wanted to engage in nitric acid, I'm really afraid that she will get nitroglycerin out, not to mention anything else, if she blows herself up, then we will lose a talent who has been carefully cultivated for many years!"

The curiosity of young people is what makes Xu Yue feel the most headache.

If you don't do it, you won't die, but they won't remember that advice.

"And cotton, which is also one of the important raw materials for making bombs, and I'm really panicking right now......"

Xu Yue shook her head and calmed herself down, "How can they be so smart?" Especially Xu Fubao, how did I not know that mathematics was so good before? ”

Xu Erniang rolled her eyes speechlessly and told the truth, "It's not that you teach too much?" ”

"But this is a predictable fact, don't be too nervous, let's implement safety education first."

Xu Yue asked tentatively: "What does Sister mean by letting them develop naturally?" ”

Xu Erniang nodded and smiled playfully, "I can't help but use the electric light that you often hang on my lips in my lifetime, it is as bright as day, and it seems to be more powerful than my holy light~"

Xu Yue thought to herself, this is really possible.

"To be on the safe side, let's ask Daddy, Auntie and Big Brother what they think." Xu Yue took out the walkie-talkie.

Xu Erniang had no opinion, got up and called Xu Dalang in, a family of five, and held a small family meeting through the walkie-talkie.

The theme of the conference was whether or not to intervene in the natural development of the students.

After a brief ten-minute meeting, the family of five came to a common conclusion:

Do a good job of safety education, supplement the vacancy of teaching materials, and leave the rest, to time.

So, Xu Yue's three brothers and sisters reinstalled the part of the content that they had removed from the textbook overnight.

After that, all the students were gathered and a safety education meeting was held seriously to make the students realize that engaging in science is a matter of life!

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