In the school, everyone looked at Xiao Ming, including Luo Xin, who was also full of expectations. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Now Qingzhou's artillery belongs to smoothbore guns, that is, direct-fire guns, in ancient times firearms are a miniature version of artillery, and because of this, the principle of three points and one line is also applicable to firearms.

However, these three points and one line do not mean that it is enough to install a crosshair and a light door, the front sight and light door of different guns are different, this needs to be tested, after all, the power of different guns, the weight of the shells is not the same.

Therefore, his artillery also needs to be tested and then get data in order to install accurate crosshairs and illuminators.

"That's why it's a parabolic principle, and when a cannonball is fired, it's affected by gravity." Xiao Ming said.

When he said this, the entire academy looked confused.

Looking at the confused faces, Xiao Ming suddenly felt a little tired, this is the purpose of his opening a school, this matter is not something that can teach Luo Xin in three or two days.

First of all, he had to teach them addition, subtraction, multiplication and division, and then start from basic physics, and reach the level of physics in the second year of junior high school, he estimated that even with the high quality of his scientific and technological spar, it would take nearly a month for Luo Xin and others to learn how to calculate the impact point and complete the test of the front sight and the door.

Of course, he will not sell this crosshair and the cannon with the light gate, but keep it for his own use, once he has the front sight and the light door, this is equivalent to a technological upgrade.

When the two armies face each other, the superiority of this artillery will immediately become apparent.

"Your Highness, we don't understand what you're saying." Luo Xin is a military general after all, and he also has a headache with this knowledge.

"You'll understand when you learn it." Xiao Ming ignored Luo Xin, he was not going to tell Luo Xin about this round world, anyway, this guy walked on land, and it was useless to learn it, but he had to say this to Yue Yun, fortunately, Yue Yun was teachable, much better than Luo Xin.

Then he began to talk about basic mathematics, writing the basic Arabic numerals on the blackboard, in the future voyage, Yue Yun also needs to perform mathematical calculations to determine the direction, so he also has to learn this knowledge.

For the rest of the day, Xiao Ming basically spent time in the academy, from simple Arabic counts to addition and subtraction within ten, to more complex calculations.

Because they are all adults and have the initiative to learn, this afternoon's lesson is quite good, and because of the effect of the technology spar, they have memorized most of the content.

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

At this time, the sky was already a little hazy, and he was about to go back at this time, when he suddenly saw a person hurrying towards him from the gate of Bowen College.

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

The person who came was Qian Dafu, as soon as 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 have finally found it." Qian Dafu used to be a fat man, but now he is dark and thin, and his face is excited at this time.

Xiao Ming was also excited, and he said, "Great, Dafu, you have made a great contribution." ”

"As long as His Highness's affairs are not delayed, the old slave will be happy, and as for this credit, the old slave really doesn't care." Qian Dafu said with a smile.

Xiao Ming was moved in his heart, this Qian Dafu was a person he completely believed, so he handed over the heavy task of prospecting to him.

What he lacks now is resources.

"Go back to the palace, I'll let the kitchen prepare a big meal for you." Xiao Ming laughed.

After returning to the palace, Xiao Ming asked the kitchen to prepare food, and at the same time went to the main hall with Qian Dafu to inquire about the saltpeter mine.

"Your Highness, this mine is really hard to find, we have been looking for a whole month in the place that Your Highness roughly said, and we haven't found anything, does Your Highness know how we found it later?" Qian Dafu said.

Xiao Ming shook his head.

"At that time, we were too far away from the nearest village to go back, and there was no food, and several soldiers discussed going into the mountains to hunt, but when they were chasing a hare, the hare suddenly got into a cave in the woods, and several soldiers went in and found that there was saltpeter in this cave." Qian Dafu's eyebrows danced.

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

At this time, the saltpeter mine has made progress, and neither the King of Shu nor the imperial court can use this to blackmail him.

"It seems that the king has to thank this rabbit for a long time." Xiao Ming's expression was happy, and he said, "Where is this lead mine?" ”

Qian Dafu drank water and said: "The lead mine is a little far away from Qingzhou, near Yizhou. ”

Yizhou is about 200 miles away from Qingzhou, which is indeed a little far, he said: "Far away is far away, better than nothing, but this tungsten mine still has no progress?" ”

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

"Because the smelting of tungsten ore and wrought iron can make the material harder, if there is tungsten ore, this king can try to produce tungsten alloy, so that the manual lathe has qualified tools, and then this king can make a magical machine." Xiao Ming said that the mysterious machinery in his mouth was naturally the steam engine.

Qingzhou's population was too small, and once the steam engine was available, he could replace the lack of manpower with steam engine power.

What's more, this can greatly increase the amount of steel produced in the steel mill.

Qian Dafu didn't seem to understand, he smiled and said: "Since this is the case, the old slave will focus on looking for tungsten ore below." ”

The saltpeter mine solves the problem of gunpowder, and the lead mine solves the problem of artillery shells and future firearm bullets, Xiao Ming has a big chunk in his heart, but now he has to think about preparing for the next technological upgrade.

And that's what makes the lathe really work.

"Don't worry, this time you rest for a while before leaving, this king doesn't want to tire you out." Xiao Ming said.

The two talked for a while, when the pothos walked in and said, "Your Highness, the meal is ready." ”

"Let's go, let's eat, this king has asked Ku Ding to prepare your favorite smoked pig's trotters for you." Xiao Ming said with a smile.

As soon as he mentioned this, Qian Dafu suddenly laughed, "Your Highness, the old slave is just like this, no matter how tired you are after eating this pig's trotters, it is worth it." ”

Xiao Ming laughed when he heard this, and the pothos also covered her mouth and smiled, after returning to Qingzhou, this girl gradually recovered.

Speaking of which, Xiao Ming also likes to eat smoked pig's trotters, but there is no such dish in Dayu, this is what he taught to cook Ding to make them carefully, this Qian Dafu has been addicted to it since the first time he ate it, and he drooled when he saw smoked pig's trotters.

(To be continued.) )