Zhu Fu and Guo Wansan were both looking at the middle-aged man in front of them.

I haven't seen it, I don't know it.

The upper body is strong, the dress is plain, the cuffs and neckline are white, and it can be seen that this dress has been worn for a long time.

"You are?"

Zhu Fu frowned and thought for a long time, but he didn't remember who the holy person in front of him was, but he was born fluent in Nanjing official dialect.

"Mo Cheng, Si Cheng of the Steam R&D Department of the Ministry of Industry."

The middle-aged man reported home, which surprised Zhu Fu and Guo Wansan.

The latter was surprised entirely because of the rank of Si Cheng's official position, and there were only a few divisions in the Ministry of Industry, and each Si Cheng was a member of the fourth grade.

And Zhu Fu's surprise lies entirely in the prefix.

If you want to say that it is the Yu Heng Division, the Camp Division, and the Dushui Division, these institutions are not called, and they are in Nanjing, and Zhu Fu has seen too many such officials.

Only the first division of the Ministry of Industry, the Steam R&D Department, is a real mysterious department.

According to legend, all the things that were needed in the development of the Steam Division had to make way for the whole country.

Ask people to give people, ask for money to give money.

And the person in front of him turned out to be the Si Cheng of the Steam Division?

"Disrespectful, disrespectful."

At this time, even Zhu Fu didn't dare to grasp his identity, and he was courteous, although he was the manager of the Liao Palace, he had no official status, and the one in front of him was the most mysterious official in the Ming Dynasty.

People always have a sense of fear of the unfamiliar.

And Guo Wansan, who was on the side, saw that even Zhu Fu was saluting, and he was so frightened that he hurriedly bowed down to greet him.

This meeting made Mo Cheng a little at a loss, so he also returned a salute to the two of them, scaring the two of them enough to return the salute again.

And so the three of them worshipped heaven and earth.

If Zeng Wenji hadn't come over to interrupt the three of them, the three of them wouldn't know what year or month they would have worshipped.

As soon as he saw Zeng Wenji, Guo Wansan was nervous and hung on the ground.

This is a provincial domain!

"Three, what's wrong?"

Zeng Wenji didn't understand a little, but he knew Mo Cheng, because on the day Mo Cheng arrived in Guangzhou with Nan Zhili's study group earlier, the Guangdong political envoy was inevitably received as the host.

Mo Chengcheng relayed the scene just now, causing Zeng Wenji to shake his head and smile bitterly, facing Zhu Fu and the others: "This Mo Sicheng is a pure master, staying in the workshop for several months, your set of rules for courtesy and exchange is too cumbersome, there is no need to be like this." ”

After introducing Mo Cheng, Zeng Wenji was also interested in Mo Cheng's speech: "Mo Sicheng said that it can be done with a machine, how to do it?" ”

Because of Zeng Wenji's identity, the remote area where Mo Cheng and the three of them were originally located has become the core circle of this conference, and almost everyone looks at Mo Cheng, although they actually focus more on Zeng Wenji.

"The two of them were researching how to pump water from the mine, and it was difficult to push it with a manual pump, so I thought of using steam to push it."

Mo Cheng took out a large number of manuscripts like a trick, and his upper limbs, which were originally quite strong, suddenly became a lot thinner.

Take it with you, it's all a treasure.

Before leaving Beijing, in addition to rubbing a copy, Mo Cheng knew that the emperor had sent two hundred Jinyi guards and Xichang Fanzi to follow him south.

The number is several times more than when Zhu Wenkui left Beijing.

"This is a flowchart that took more than ten years for hundreds of people to become thousands of people studying the so-called initial 'steam'."

Mo Cheng spread out the first one and introduced it in detail: "In fact, it is wrong to only blindly study steam, and we have proved through countless experiments that the reason for making steam powerful requires a precise storage space, and I named it the cylinder."

We must first convert heat energy into kinetic energy, and in our current technical terms, the relationship between air pressure and heat must be understood before it can be extended, and after our experiments..."

A large number of professional ancestral halls and technical terms were in a daze for everyone, but fortunately, Zeng Wenji interrupted: "Mo Sicheng, you are too professional and we can't understand it, so you can just say how to operate." ”

Mo Cheng smiled embarrassedly, he was used to teaching students in the Steam Division, and as soon as he said it, he unconsciously started the teaching mode.

"First of all, we need a large-capacity precision container, absolutely no air leakage problem, at this point, after so many years of hard work, we have already been skilled in the ability to build precision cylinders by hand.

The next step is to need a piston mouth, we selected two kinds of objects to make the plug, the former is relatively easier to manufacture, and the latter took us more than five years, this is still the Ministry of Industry in order to make artillery everywhere to experiment with novel minerals, so we discovered this material, I named him fish scale ink.

All the preparations were perfect, the bearings, cranks, piston rods, linkages were not any problems, we once tried to use the piston rods to lift two stones of grain, but the efficiency was very slow, I think, this should be related to the size of the cylinder to the boiler size ratio affected the source of power.

We can try to build a large precision cylinder, plus a huge boiler, and burn more coal, so that we can generate more power, because there is no practice to prove it, so I just said that this is only a theoretical job that can be achieved to drain the machine. ”

Zhu Fu looked at Zeng Wenji, and then turned his head to look at Guo Wansan.

The two of them also turned their heads in confusion to look at the large circle of onlookers around them, and came to a conclusion, that is, the big guys didn't understand.

You've got a lot of balabala, who knows what it means.

It's air pressure and power.

What else do you say about the exponential transformation relationship, as long as I can understand a word, I will not be able to become this leftist political envoy.

Fortunately, Mo Cheng had already prepared for this, he spread out a set of drawings, called everyone, and pointed.

"I marked it above, A1 is the boiler, A2 is the cylinder, and B1 is the piston port, which is connected by the piston rod.

The boiler converts heat in the cylinder, and after reaching a certain pressure, it pushes the piston to rise, and then the pressure hammer of C 1 at the other end of the piston rod connection descends and squeezes the piston port of B 2 to fall, and when the steam in the cylinder condenses back into a vacuum, the air pressure drives B 1 to fall, and B 1 falls back to drive the piston rod to lift the pressure hammer of C 1 to rise. In this link, we can connect the principle of the hand-cranked water pump, so that the mechanical force can replace the manpower and realize the uninterrupted pumping process. ”

If you know the history of physics, you must know which steam engine Mo Cheng is talking about.

It was the Newcomen steam engine of the early eighteenth century, which was primitive, simple but had one point, that is, it consumed coal.

It wasn't until the well-known Watt improved the steam engine forty years later that the steam age was fully reached.

But this is really the first generation in history to officially quote steam equipment to the work of the people.

There are not many difficulties to overcome with this kind of prop, mainly in two points.

In the era when there were no CNC machine tools and computers, craftsmen had to build precision cylinders by hand, and there was no rubber to make piston ports.

Later pistons were mostly made of aluminum alloy or higher grade packing (expanded graphite wire was braided).

As for the theoretical knowledge such as understanding the functional relationship between air pressure and heat, it is still the same sentence, which is a little bit of practice.

If you burn three catties of coal today and find that the heat is not enough, then burn ten catties.

The seal is not good enough, the hot spot is not high, and the furnace is more precise.

The nine forging steels of the Han Dynasty could reach a high temperature of three or four hundred degrees, and the charcoal steelmaking of the Song Dynasty could reach one thousand degrees.

For Chinese craftsmen, this difficulty was solved in a few experiments.

What is really rare is the precision cylinder and plug.

It has been used by the Ministry of Engineering for many years to build a precision cylinder and a matching mold by hand, and to manufacture a piston mouth, in this era when there is no rubber tree, it is good to suffocate thousands of people from the Steam Division of the Ministry of Labor.

Animal casings, fish gelatin, gum and steel were tried one by one.

In the early years, in order to make cannons, the Ministry of Industry experimented with rare mines in Tiannan and Haibei, and dug out an object that resembled fish scales from the desert court, which was named fish scale ink.

In fact, it is flake graphite.

As for the substances required in a series of chemical treatment methods such as sulfuric acid, nitric acid, and hydrogen peroxide required to convert flake graphite into expanded graphite, in addition to the extraction of hydrogen peroxide after long-term unremitting efforts, the other two were discovered as early as the Tang Dynasty Fangshi in the process of alchemy for the emperor.

Including hydrogen peroxide is not called hydrogen peroxide, to be precise, it has been named Lan Gong by Mo Cheng.

Taken from the color tint bluish.

Including sulfuric acid and nitric acid, it is not called the modern scientific name, and it is used here for the convenience of cognition, otherwise all of them are self-named, and there may be a sense of jumping.

This large section of the inherent professional content, let Mo Cheng spit around, the big guy was still confused, only a group of water supply and drainage craftsmen who participated in the construction of the Yueshang Building listened with bright eyes.

"Good!"

This uncontrollable praise resounded in the silent venue, startling the big guys.

The crowd was squeezed out, and several local craftsmen in Guangdong gathered around Mo Cheng, looking at the drawings and their eyes lit up: "Once this method is feasible, not to mention the realization of underground drainage, the underground can also be used to supply water, we only need to build a similar pump near an aqueduct, install a two-way connector between pumping and water supply, and completely realize that the valve is opened, and the water naturally gushes out of the water spray head." ”

With a bosom friend, Mo Chengcheng was even happier, and he took the drawings on the spot and talked to a few people about the feasibility of cooperation, but he snubbed a group of people, including Zeng Wenji.

Maybe even they themselves can't imagine how important this day is.

A completely strange and immature, but infinite magical technology is about to come out, which will change the Ming Dynasty, and it will change the whole world.

Countless people have benefited from it, and countless people have died because of it.

Anyway.

Welcome, Steam!