In the school, everyone looked at Xiao Ming, including Luo Xin, and was also full of expectations.

The artillery in Qingzhou now belongs to smooth-bore cannons, that is, direct-fired cannons. In ancient times, guns were a reduced version of artillery. Because of this, the principle of three points and one line is also applicable to guns.

However, these three points and one line do not mean that you can just install a sight line and a sight line. The sight line and sight line of different guns are different, and this requires testing. After all, the power of different artillery and the weight of shells are also different.

Therefore, his artillery also needs to be tested before obtaining data to install accurate sight and gate.

"The reason is the parabola principle. When the shells are shot out, they will be affected by gravity." Xiao Ming said.

He said this and the whole school showed a confused look.

Looking at the confused faces, Xiao Ming suddenly felt a little tired. This was his purpose of opening a school. This matter could not be taught to Luo Xin in just a few days.

First of all, he had to teach them addition, subtraction, multiplication and division, and then start with basic physics and reach the level of physics in the second grade of junior high school. He estimated that even with the quality of his technological crystal, it would take nearly a month to let Luo Xin and others learn how to calculate the bounce point and complete the test of sight and sight.

Of course, he will not sell these sights and cannons with sights, but will leave them for himself. Once he has sights and sights, it is equivalent to a technological upgrade.

When the two armies confront each other, the advantages of the artillery will be immediately highlighted.

"We don't understand what you said, Your Highness." Luo Xin was a general after all, and he was also very troubled by this knowledge.

"You will understand after learning." Xiao Ming ignored Luo Xin. He was not going to tell Luo Xin about the saying that the sky was perfect and the place was better. Anyway, this guy was on land and it was not very useful to learn it. He had to say this to Yue Yun. Fortunately, Yue Yun was taught and much better than Luo Xin.

Then he began to talk about basic mathematics and wrote basic Arabic numerals on the blackboard. In the future, Yue Yun also needed to perform mathematical calculations to determine the direction, so he also had to learn this knowledge.

Xiao Ming basically spent the rest of the day in school, from simple Arabic several times to addition and subtraction within ten, to more complex calculation methods.

Because they are all adults and have the initiative to learn, the courses this afternoon were effective, and because of the role of technology crystals, they remembered most of the content.

In the evening, Xiao Ming asked Lu Tong to arrange food and accommodation for Yue Yun and others, and told Luo Xin to come over to listen every afternoon before returning to the palace.

At this time, the sky was already dark. He was about to go back when he suddenly saw a man walking hurriedly from the entrance of the Bowen Academy.

"Great rich!" Xiao Ming saw this person clearly and said in surprise.

The person who came was Qian Dafu. When he saw Xiao Ming, Qian Dafu immediately said: "Your Highness, the saltpeter mine has finally been found, and we have also found the lead mine!"

"What, really?" Xiao Ming was overjoyed.

"Yes, Your Highness, we finally found it." Qian Dafu used to be a fat man, but now he is dark and thin. At this time, his face was excited.

Xiao Ming was also excited, and he said, "It's great, you have made great contributions."

"As long as you don't delay your highness's affairs, I will be happy. As for this credit, I really don't care." Qian Dafu said with a smile.

Xiao Ming was moved in his heart. Qian Dafu was the one he believed in completely, so he handed over the heavy responsibility of mining search to him.

What he lacks now is resources.

"Let's talk about it when you go back to the palace. I'll ask the kitchen to prepare a big meal for you." Xiao Ming laughed.

After returning to the palace, Xiao Ming asked the kitchen to prepare food, while going to the main hall with Qian Dafu to inquire about the saltpeter mine.

"Your Highness, this mine is really hard to find. We searched the place where Your Highness roughly mentioned for a whole month, but nothing was found. Does Your Highness know how he found it later?" Qian Dafu said.

Xiao Ming shook his head.

"At that time, we were too far from the nearest village to go back, and we had no food. Several soldiers discussed going into the mountains to hunt. Unexpectedly, when chasing a hare, the hare suddenly got into a cave in the woods. When several soldiers entered, they immediately found that there was saltpeter in the cave." Qian Dafu was furious.

Qian Dafu said it very simply, but Xiao Ming could understand the hardships of mining search.

At this time, the saltpeter mine had made progress, and neither the King of Shu nor the court could threaten him with this.

"It seems that I want to thank this rabbit." Xiao Ming looked happy and said, "Where is this lead mine?"

Qian Dafu drank the water and said, "The lead mine is a bit far from Qingzhou, and is near Yizhou."

Yizhou is about 200 miles away from Qingzhou, which is indeed a bit far away. He said: "It's better to be far away than nothing, but has this tungsten ore still made no progress?"

Qian Dafu shook his head and said regretfully: "The tungsten ore has not been discovered yet, but Your Highness, why do you have to look for this tungsten ore?"

"Because the smelting of tungsten ore and ferrous iron can make the material harder, if there is tungsten ore, I can try to produce tungsten alloys, so that the manual lathes will have qualified tools, and then I will be able to create a magical machine." Xiao Ming said, the mysterious machine he said was naturally a steam engine.

Qingzhou has too few populations. Once the steam engine is released, it can replace the lack of manpower with the steam engine power.

More importantly, this can greatly increase the amount of steelmaking in the steel workshop.

Qian Dafu seemed to understand or not, and he smiled and said, "Since that's the case, I will focus on finding tungsten ore."

The saltpeter mine solved the problem of gunpowder, and the lead mine solved the problem of artillery shells and future gun bullets. Xiao Ming was very worried, but he had to think about preparing for the next technological upgrade.

And that's what makes the lathe really work.

"No hurry, you can rest for a while before leaving this time. I don't want to exhaust you from the least." Xiao Ming said.

The two of them talked for a while, and then Luluo walked in and said, "Your Highness, the food is ready."

"Let's go and have a meal. I asked the cook Ding to prepare your favorite smoked pig's trotters." Xiao Ming smiled.

As soon as he mentioned this, Qian Dafu immediately laughed, "Your Highness, I'm just fine with this bite. It's worth it even if I've eaten this pig's trotter."

Xiao Ming laughed loudly when he heard this, and Luluo also covered her mouth and laughed lightly. After returning to Qingzhou, the girl gradually recovered.

Speaking of which, Xiao Ming also likes to eat smoked pig's trotters, but the country of Yu does not have this dish. This is what he taught the chef Ding to make carefully. Qian Dafu has become addicted since he first ate it and drools when he sees smoked pig's trotters.
Chapter completed!