Yan Ming asked people to take the little worker down.

And two stones were repeatedly observed in his hands.

"Let's throw away these two stones. It's too dangerous to put it here. Wei Qing said.

Yan Ming nodded and said, "This stone is indeed dangerous. This reminds me that the warehouse still needs to be remodeled. In the future, all storage warehouses should be spaced at a certain distance. Also, the surrounding residents are going to move away. ”

Normally, a factory for the manufacture of this kind of gunpowder would not have been able to exist in the city. But this is a border city, if it is placed outside, it will not take a month, and this factory will be served by the Huns.

The situation at the border can only be the mode of factories driving out residents.

Even if Yan Ming doesn't say so, the surrounding residents are also going to relocate. In their opinion, this place was too dangerous.

"Let the county do a good job in the resettlement of the surrounding residents, and don't stop production." Yan Ming said as he asked the old man Lu to come.

Now that the gunpowder maker is dead, an old man is needed to take charge of it. In Yan Ming's opinion, it is the old man Lu who is the most suitable.

Hearing that Ya supervised the construction of this extremely confidential factory, Old Man Lu's hands trembled a little. He didn't think he was scared, but more excited.

Old man Lu, who has struggled all his life, never dreamed that one day, he would be able to become an official in the court.

Although the superintendent is not in the formal establishment, it is always appointed by the imperial court.

He and Old Man Lu carefully explained the details of gunpowder manufacturing. told him to pay attention to safe production and learn lessons.

Old man Lu told Yan Ming to rest assured. As a veteran carpenter, if you want to build a taller shelf for gunpowder, you don't necessarily have to use stone, wouldn't it be better to make a wooden shelf?

That's where carpenters come in.

Yan Ming left the gunpowder factory in Dongcheng with two stones and a baby.

Wei Qing followed Yan Ming and said, "What are you doing with these two troublesome stones?" ”

Yan Ming said with a smile: "This thing is not an ordinary stone, an ordinary stone, have you ever seen a spark with a slight knock?" ”

Wei Qing shook his head.

"If I'm not mistaken, this thing might be called flint." Yan Ming said.

"Flint? You mean the stone that the Fusiliers drilled wood for fire? Wei Qing laughed after speaking. The Suiren clan drilled wood to make fire, and they also used wood, how could it be stone!

Yan Ming said: "Flint, as long as it collides, it will produce high-heat sparks. This spark can ignite gunpowder. This accident was caused by these two pieces of flint. ”

"What's the use of this stone?" Wei Qing looked at Yan Ming holding two stones like a baby, and couldn't help asking.

"Ignite the fire, such a good thing to ignite!" Yan Ming raised his hand.

Wei Qing glanced at him, this brother of his would never be so superficial to take two stones to start a fire.

Sure enough, Yan Ming continued: "Third brother, you send a few people to the vicinity to see if there is such a stone mine." If so, that's interesting! ”

Wei Qing nodded and said, "I'll send out a few teams of people and horses later, and look for them." ”

"Also, the dead Du Jian, his wife and children must be helpless. Counting on the imperial court, I'm afraid it's not bad if you don't punish him. Why don't I write a letter and let their orphans and widows go to school in Hongyan Hall, and there will be a place to eat. Yan Ming said.

In fact, he just talked to Wei Qing about it, and he had to do it. After all, it is not easy to be alive.

returned to the county guard's mansion, and Yan Ming locked himself in the study.

He set the two stones aside.

"Chengxin, go and call me Elder Chen." Yan Ming said.

"No!" Chengxin agreed, and was about to leave.

"Forget it, you should accompany me to find Elder Chen." After Yan Ming finished speaking, he got up and walked out of the study.

Originally, he wanted to draw a drawing for Da Lao Chen, but after thinking about it, it was better to see what he was going to build with his own eyes.

and Chengxin came to the iron smelting village of Da Lao Chen.

Yan Ming directly explained the intention, that is, let Da Lao Chen use the means of building a swallow knife to give him a piece of iron sheet with excellent toughness and hardness. Then the iron sheet is rolled into an iron pipe.

This kind of work is extremely simple in the later generations. But if the Han Dynasty wanted to build seamless steel pipes and iron pipes, it was even more difficult.

Elder Chen pondered for a moment and said, "Master Hou, it's too difficult to build an iron pipe. Why don't we cast an iron pipe, what do you think? ”

Yan Ming shook his head and said: "Cast iron pipes, the hardness is enough, but the toughness is not good. Hard and brittle, not what I wanted. You still build. ”

Elder Chen nodded.

"By the way, there's nothing sharper here that can carve a mark into the iron." Yan Ming asked.

Elder Chen turned around and took a small disc and said, "This is a small cone that I have carefully refined, which can carve lines on iron. ”

Yan Ming took it, looked at it, and experimented on the iron tool on the side. With a little force, it left a mark on the iron.

"This little thing is good, can it make other shapes?" Yan Ming weighed it and said.

Elder Chen frowned slightly and said, "It's not easy to refine, but it's not difficult to make it." ”

Yan Ming was overjoyed and said, "In this way, I'll draw you a drawing later." You follow what I drew and polish it out first. I'm of great use. Remember, if you succeed, I'll give you a marquis. ”

Elder Chen was slightly stunned, he never dreamed that he could get a marquis by creating something that could be engraved on iron. Two big eyes flickered as they looked at Yan Ming.

I saw Yan Ming's serious face, it didn't seem to be a joke.

The elder Chen's mouth was a little dry, and he said, "Master Hou, are you really not making fun of me?" ”

Yan Ming looked up at Elder Chen and said, "Do you look like me?" ”

"Not like that!"

"It's useless to talk less, it's not easy to polish this thing, you first follow the method of building a swallow knife and create an iron sheet for me." Yan Ming said.

"It's easy, with a manpower piledriver, it's much easier to make iron. Otherwise, we wouldn't have the time to study this kind of small change. Elder Chen laughed.

That night, Yan Ming stayed in the iron smelting village of Da Lao Chen.

Looking at the manpower pile driver, a piece of iron has been continuously quenched, and after thousands of tempering, it has gradually become what he wants.

"I'm done, I'm going to roll this thing into an iron pipe." Yan Ming said

Elder Chen didn't know what Yan Ming was going to do, but the matter of rolling the iron sheet into an iron pipe was still simple.

"The inside should be smooth and not angular." Yan Ming commanded while watching the eldest elder Chen and them work.

Under his command, a smooth iron pipe was rolled out. In order to make the iron pipe more like a seamless steel pipe. Da Lao Chen also poured a circle of molten iron outside. In this way, an iron pipe that is tough on the inside and rough on the outside is made.