Is this the Duke's Mansion?

Old Frederick, who was helped out of the carriage by the manservant of the Duke's Mansion, took a deep breath to calm down the nervousness in his heart. Having already received the news, the butler who was waiting in front of the big i smiled and nodded to him: "Please follow me, sir.

Old Frederick walked tremblingly to the gate of the Duke's Mansion, and bowed awkwardly to the butler.

The butler nodded, and walked forward smoothly and lightly with his hands behind his back.

Old Frederick followed closely behind the butler, not daring to say more.

In the past, he was considered a well-known craftsman in Teutonic, but he was just a craftsman. Even though the old Frederick had technology, he did not own his own company or business—because of the corporate franchise in Teutonic, most of the people who were able to list and establish formal "companies" were rich and wealthy nobles.

Therefore, although he is the inventor of a new type of steelmaking furnace, although this steelmaking furnace has begun to produce military steel, this does not mean that the status of old Frederick will rise because of this. Although the technology of the steel-making furnace was sold for some money, he bought a manor with the money, but he usually still goes to work on a steam locomotive, and only gets a salary of a master craftsman-he is sixty-eight this year It's age, it's time to retire. But he can't retire yet.

Because it was only three years since he invented the open-hearth steelmaking method. It is precisely because of his invention of the open hearth that he was able to jump from a fifth-level craftsman to a master craftsman three times in a row, and the new water was raised to a high of thirty pounds a month. An ordinary Teutonic bank executive, only An income of around £5 to £6. This level of income is enough for them to be a decent person, hire several servants, even hire cooks and tutors, and accumulate a fortune. In addition, before that, he sold the patent of the open-hearth steelmaking method in exchange for a manor. As long as they rent it to a few honest and willing farmers, at least his children will have at least a small amount of rent every year to make ends meet, and they will not starve to death.

Old Frederick was not long to live. Not only he knew about it, but also the leaders of his factory, his family, and even the Ministry of Industry. That's why they didn't hire him to work in the Ministry of Industry in Gaoxin, but directly bought out his patent. Because of old Frerick's physical condition and age, he has no extra value.

But he thought. At least before I die, I can leave more money for my children. Let them no longer live in such a difficult situation, and now he took a special trip to ask for leave to meet the well-known "curiosity hunter" Duke Galeazzo, precisely because he wanted to leave a way for his children to survive.

Old Frederick followed humbly behind the butler of the duke's mansion, stepped on the white velvet carpet with brown patterns, felt like he was in heaven, and stepped on soft clouds, his footsteps were vacant, as if the center of gravity shifted slightly Decorate where it falls and hits. He felt novelty at first, and then panic. He was worried that if he didn't change his shoes at the door, he would step on the carpet of the Duke's house; he didn't dare to suddenly ask the housekeeper of the Duke's house, for fear of offending the lord—even the housekeeper of the Duke's house would be too much for him. It is far from being an unattainable "big man". Sweat dripped from his gray temples, and he looked around in fear. On both sides of the corridor, there are some extremely gorgeous picture frames. From one end to the other, there are more than a dozen paintings on each corridor.

Each of these paintings should be worth at least a few hundred pounds.

Old Frederick thought about it, and felt a little awed and timid again. At this moment, the housekeeper suddenly stopped. Old Frederick missed the brakes and almost ran into him.

"This is the master's study.

But the butler didn't say anything, he just turned around and replied briefly: "Master Leonardo is inside. The butler opened the door and said respectfully: "My lord. His Excellency Siemens brought it. "

"Thank you, let him come in.

A young and gentle voice came from the house.

The butler responded, then looked back at Fendrek, and made a "please" gesture.

Old Frederick was taken aback for a moment, then came to his senses and entered the door in a panic.

For a moment doubts arose in his mind

Is the Duke's name Leonardo?

But when he looked into the room, he only saw a boy with black hair and green eyes, wearing a slim dress, sitting on the seat like a little adult, smiling gently, and looking at himself.

"Hello, His Excellency Frederick Siemens. Let me introduce myself, my name is Leonardo da Vinci.

His gentle and humble voice sounded, but old Frederick was in a trance, as if he saw a shining golden giant sitting there, looking down at him with cold eyes, and his voice was full of majestic echoes." I'm the friend and partner of Monsieur Galeazzo, you can call me Leonardo. Old Frederick couldn't help blinking.

The next moment, the scene in front of him shattered like a bubble. Where are the golden giants and majestic echoes?

"As a matter of fact, it was I who asked Monsieur Galeazzo to invite you. I have something to ask you about the open-hearth method, Monsieur."

Hearing this, even though he felt uneasy and panicked, Old Frederick couldn't help but said, "I have already sold the patent of the open hearth furnace to the Ministry of Industry, isn't that not too bad?" Ah, you misunderstood. "

Leonardo smiled brilliantly $"I don't want drawings and design plans. I'm just researching this aspect recently, and I just want to ask about your thinking in the creative process. Hearing this, old Frederick heaved a sigh of relief. , asked in a low voice.

When he wants to come. Such a child in his early teens is nothing more than asking some simple industrial knowledge. He claimed to be the Duke's partner, and it is estimated that he is probably the Duke's relative's family. It is because of these trivial matters that he is invited to come over, which is a bit overkill. But this can be regarded as the Duke's respect and trust in him, and it can also be regarded as a favor. And it would be great to be able to fool the past so easily, but just as old Frederick was thinking this way, the child's words made him stunned in place.

"What I want to ask is

Leonardo said, and opened the notebook in his hand: "I heard that your open-hearth steelmaking method works on the principle of cyanide heat. On the way of blowing into the open-hearth furnace, the air passes through a cell made of refractory bricks. And these refractory bricks are heated by the exhaust gas of the same open hearth furnace. Through repeated heating, the temperature in the furnace can exceed 1600 degrees, which is enough to melt cheap scrap steel and carry out steel reproduction. "Then how do you To prevent the solid particles in the exhaust gas from being deposited in the brick grid? Also, how did you switch the direction of the gas outlet and the flame? "Leonardo asked calmly and very methodically. Old Frederick looked at Leonardo blankly, almost thinking that he had returned to the Ministry of Industry. The day he explained his major.

As if in front of his eyes. Not a fourteen or fifteen-year-old boy. It was a sharp-tongued, experienced craftsman in his forties or fifties.

"I adopted the design of the sedimentation chamber here. The exported exhaust gas enters the sedimentation chamber of the second open hearth furnace from top to bottom. The direction of the airflow changes, and the volume suddenly expands, which reduces the flow rate of the exhaust gas, so that most of the coarse grains it entrains The **** and dust settled down. At the same time, next to the investigation room was the heat room, which directly brought the heat of the exhaust gas to the second furnace. He was a little nervous, but he seemed to have let go of some burden, and began to explain his invention. Leonardo also He was just keeping records, asking additional questions from time to time, and seriously discussing something. Old Frederick gradually became less nervous. After entering his field of expertise, old Frederick's stuttering language style immediately disappeared. Disappeared, and instead, the whole person was filled with the brilliance of self-confidence