The principle and structure of the DC generator are very simple, Roland dismantled more than a dozen four-wheel drive motors when he was a child, from the ordinary whiteboard motor to the legendary Jin Chaoma, and also wound the rotor copper wire by himself. These motors are typical DC motors.

There is no structural difference between a DC generator and a DC motor, in essence, they are the same thing, and the functions are interchangeable. As long as other machines drive the motor rotor to rotate, and let the wire continuously cut the magnetic inductance line, the energy source will continuously generate induced current.

With the help of Mystery Moon and Anna, it only took Roland half a day to assemble a simple DC motor, and the stator part was all made of wood, and then handed over to Mystery Moon to give it magnetism. The commutator at the end of the rotor is embedded in a log with a hole in the center of the log that can be connected to the shaft of the steam engine. This structure is not only convenient for fabrication, but also ensures that the commutator pieces are insulated from each other.

As for the new steam engine, it became him and Mitsuki watching Anna perform their amazing machining skills. When it came time to make large parts, she would open up a black fire, wrap a pile of iron ingots in it like a cloth, melt it, shrink it, press it into a plate that meets the required size, and finally cut it into shape.

The next day, when Roland was about to go to the backyard of the calcination room to test the effect of the generator, the guards brought him the good news that the chief alchemist from the Alchemy Workshop in Chishui City had arrived in the border town, and there was more than one person with him.

Kemo Stoll was so decisive that he boarded a merchant ship bound for the border town with his family and more than a dozen disciples that afternoon. Unfortunately, Chamez hesitated and declined his invitation.

He didn't reveal the contents of the letter to the other alchemists, and the more people who knew, the later he would set off. Cammo feared that the news of the successful firing of the crystal glass would soon reach the Duke's ears, and that it would not be so easy to leave when the time came—the Duke would definitely want to hold on to such a lucrative luxury.

He had already written down the glass recipe and firing method on parchment and stored it in the formula cabinet in the refining room, which was also a reward for the duke's investment in building an alchemy workshop. It's just that in the face of the truth of alchemy, whether it is crystal glass or alchemy workshop, it is not worth mentioning.

Five days later, Cammo finally met the owner who had written the letter, Lord of Frontiertown, Roland Wimbleton.

In the castle parlor, he had just finished saluting, and before he could sit down, he couldn't wait to speak: "Your Highness, I want to have a good talk with your alchemist. ”

"My alchemist?" the other party smiled, "Before you came, there wasn't a single alchemist in Frontier Town. But now, you're my alchemist. ”

"You mean...... Those alchemy formulas, you wrote them yourself?" Kaimo directly ignored the second half of his sentence, and his face became a little pale. He suddenly thought of another possibility, the other party was a prince, and all the knowledge he received came from the teachings of the palace master, if he could know all this, wouldn't it be that the Royal Alchemy Association had already mastered the essence of alchemy changes? And he still wanted to be above them, it was ridiculous to say it.

"Not exactly," said Roland, "these formulas come from ancient books dating back more than four hundred years, and I discovered them by chance. It seems that hundreds of years ago, they called alchemy "chemistry". ”

"Transform ...... Learn?" Kaimo felt a lot better when he heard that the formula did not come from the Royal Capital Alchemy Association, but the answer given by the prince still surprised him. Alchemy books more than 400 years ago? You must know that the history of the Wangdu Alchemy Association is less than 200 years, is it not as good as the predecessors?

Yes, in the book, the scholars mention a hypothesis, which is the theory of the immortality of matter. The matter that makes up everything in the world does not disappear or increase, they only change from one form to another, such as this pastry," Roland pointed to the cake on the long table, "after you eat it, some of it is absorbed by you, and some part is excreted from your body, and if you add up the absorbed part and the part that is excreted from the body, they should be of equal mass. ”

"Wait...... Your Highness," thought Kemosi, "if I burn a piece of wood into powder, no matter how I weigh it, the weight of the fired powder will be lighter than that of wood. If the substance is not destroyed, then where is the missing part of the matter?"

"These are also explained in the book," laughs Roland, "and they become gas and water." And the water is evaporated by the flame, so in the end you can only see the residue that remains. ”

"Gas?" said Kemo felt something come out of his mind, "Does air have weight?"

"Of course, everything has mass. The prince nodded, "It's easy to verify this, fill the bottle with a pile of wood chips, cover the bottle and place it on the scale, and wait until it is balanced to ignite the wood chips." Eventually, you'll notice that the weight of the bottle doesn't change. Because the gas released by combustion cannot escape, it remains in the bottle. ”

"This ...... It's also written in ancient books?" asked Kemo eagerly, "Can you show me the book?"

"If you can promise me a few conditions," Roland said.

"Speak, please. ”

"First of all, you have to work for me, and the salary is calculated according to the remuneration when you were in the Alchemy Workshop in Chishui City. Second, once you accept the job, you must abide by confidentiality regulations. In other words, the content of the work must not be revealed to other alchemists. Third, if you agree, we sign the contract. This contract lasts for five years, and after five years, you are free to choose to stay, and the results of alchemy are no longer restricted by secrecy regulations, and can be displayed to other alchemists or alchemist guilds. Correspondingly, if you accept these three conditions, the border town will provide housing and a chemistry laboratory. At the same time, I will also lend you the book "Elementary Chemistry" to read, if you have any questions, you can come and ask me. ”

It didn't sound like a harsh condition, and Kaimo thought to himself, although words like secrecy regulations, chemical laboratories, etc., were really difficult to say, but he could still understand the general meaning. A five-year contract wasn't too long, and he had expected the lord to ask him to stay in the Frontier forever.

And...... Even if the conditions were harsh, he wanted to see with his own eyes the book that recorded the essence of alchemy.

Thinking of this, Kaimo got up and bent down slightly: "I am willing to serve you, Your Royal Highness." ”

"Very well, then it is settled," the prince didn't seem to care much about etiquette, "your place of work is by the Chishui River, and after signing the contract, I will take you to familiarize yourself with the laboratory, and by the way, introduce the purpose and operation rules of those glassware." ”

What made the chief alchemist feel that something was wrong, why did His Royal Highness the Prince talk about alchemy so skillfully, and even make people feel confident? He was just an ordinary nobleman who had accidentally come into contact with the ancient alchemy books? But these were all minutiae, he suppressed his doubts and asked, "I don't know what His Highness needs me to refine?"

"The more acid, the better. The prince replied. (To be continued.) )