The Release That Witch
Chapters 19's

After entering winter, it finally rains first. The rain had been going on for two days without stopping.

Roland leaned over his desk and looked out the window. The rain was blown upwards by the wind, hitting the glass repeatedly, creating bursts of ripples. Under the refraction of the ripples, the image of the small town became distorted. The houses and streets were bent in deformation, without the usual shape. Due to the lack of effective drainage gauges, the cobblestone streets are interlocked with flowing water flows, from afar resembling many clear and clear water streams.

The mountains and forests in the distance were covered in mist, and faintly visible, like a border with the human world.

If such a landscape was placed in modern times, it would definitely be a tourist attraction, but what Roland wanted to see was a forest made of concrete and steel. Because of the rain, the construction of the city wall had to stop. This let his sense of success, which he had gained on the day before yesterday when he "break the spirit" of the fortress envoy, fade away.

"You've just said that the air around us is made up of different types of gases, is that true?"

Anna's clear voice had disturbed Roland's mind, and when she looked towards him, Anna blinked her beautiful blue eyes doubtfully.

"Ahem, Miss Anna, you should greet Your Majesty with respect" Carter warned from the side.

"Don't think about it too much," Roland turned around, "he's now my student." When it rains, he calls Carter and the two witches to attend their own class - yes, he has decided to open a natural science course. He was inspired by Karl's Stonemason college. If a mason can open a school, can a mechanical engineer open it too? Why is there discrimination? Is it not because of ignorance? Universal education at any age is the most effective measure to encourage the development of civilization.

At first he also wanted to call an assistant minister, but because he was preoccupied with other government duties, he refused. Roland did not know why, but from the beginning of winter Roland felt that Barov seemed to be filled with special enthusiasm, almost even watching Border Town alone.

When he heard about the possibility of learning a new science, Anna's eyes immediately sparkled with interest. Nana who did not need to take care of the injured animal during the lesson also became very happy. Carter, who was unemployed at the moment, attended the class to see what new nonsense the prince was thinking.

But not long after the class started, the knight's eyes became weak. Nana's gaze became distant, just staring at the two words 'Natural Science' in a daze. Although it seemed that Anna could not fully understand it, she still tried hard to remember everything. Roland had to stop his lecture for a moment in order for the three people to digest his teachings.

Hearing Anna's question, he smiled and nodded, "Of course, even though they look alike."

"Your Majesty, I don't understand, because every gas looks the same, how can you know that there are different gases?" Carter expressed his doubts.

"I can even prove it to you."

Roland knew that even with these easy-to-understand words, most people would be confused by those theories.

He decided to use a simple experiment to arouse everyone's interest.

Candles, glasses, basins, a bowl of chalk water - these were things he had prepared beforehand. Even though they currently only had pale brown colored glass, much less transparent than glass in the past, it was still transparent enough to use. After all, this simple test did not require one to observe the process of change.

Roland had done this test before, the test results showed that although there was magic in this world, the rules of nature were still the same as on Earth. He asked Anna to light a candle, then he put it in the basin.

"When something burns, it needs to consume gas. This gas is also closely related to every living thing, if we stop breathing, we will be like this candle. Watch out." Roland placed the glass on top of the candle, and after the flame trembled twice, it was immediately extinguished.

"It's exhausting the air, sir, it's no surprise." The chief knight spoke in a disapproving tone, "Of course we will die without air. For example, if we fall into the water."

"So, you think what's in the glass is nothing?" Roland asked, then he poured the chalk water into the basin, the chalk water immediately flooded the glass, but finally stopped when only half of it was filled.

This experiment is so classic that most elementary school teachers like to use it as an experiment to increase children's interest in IPAs. Roland could still recall the shock he felt when his own teacher pointed it out. From then on he embarked on a journey of science and engineering, with no recourse to return.

He gently lifted one corner of the glass, and after a while air bubbles were seen coming out of the chalk water.

Then, the clear limestone water appeared somewhat murky, and a small white cloud slowly spread within the glass.

"If there is nothing in the glass, we will not see any change in the lime water and air bubbles. This suggests that the air contains at least two different types of gases. In fact, burning a candle only takes up a part of the air, while the rest cannot burn. Although it is colorless and odorless, like previous gases, its properties are the opposite. "

"Yes ... It seemed like that was the case," Carter thought for a long time to figure out the relationship between the two, "but to find out this, what's the point?"

"If you can get used gas, you can let the fire burn longer, and when you get other gases, you can quickly extinguish the fire!" Anna suddenly said.

He was only a genius, Roland praised him in his heart. Although there was a small mistake, when hearing the properties of different gases, he could immediately think of several uses. This idea is clearly a genius level. Roland knew that he did not receive any modern education, but even without it, he could quickly think of this, he said, showing his incredible logical ability - at least he was much better than this knight-head.

“True, it can be said that since humans learned to use fire, they were separated from animals, although getting fire was just a coincidence. Maybe the lightning hit the tree and lit it, maybe the rock hit another rock and released a spark. But if no one realizes it, no one can try to use it. We will remain the same as the animals. Roland guided them patiently and systematically in the direction he wanted, "The purpose of this experiment is to show you that curiosity and thought are the driving forces of human progress. There are many similar potential forces in nature, just waiting for us to discover and use them. "

After his speech, Carter still looked doubtful. Nana was one of the unknown types whether they were asleep or awake, and she simply looked at Roland with her eyes open and unfocused. Only Anna lowered her head, as if she was thinking of something.

Well, Roland sighed, indeed, teaching too far away from the ideas they understood would not bring enlightenment; it would only make people feel confused. The height of their knowledge dictates that they cannot understand the powerful forces of nature except physically in front of them. Then they would understand just how amazing the nature of the power hidden in this world was.

Right now, the kettle hanging in the fireplace was making a clanging sound, it was the sound of steam hitting the lid.

"Ah, the water is boiling." Carter walked over to pull out the kettle with a fork, and soon the sound stopped. He took out a piece of cloth and wrapped it in his handle, then filled everyone's cup with water.

For example, when Roland reached out to hold the cup, he could feel the temperature of the cup wall. Since the first day of using fire, the principle of boiling water is well known. "The water is boiling", hundreds of thousands of people have witnessed this and used it but no one thought that the water vapor that coils and rises gently could also contain such great energy.

In a few hundred years, this will be the driving force behind the development of mankind; in a very short time it will change the history of mankind. Although the principle is simple, the problem is not limited technology. No, the problem is that the first option for most people is farming. But Roland was different from them, he thought, this world also has witches. Using magic to fight in battle? It was just a way of barbarians .. With magic that one could create, it could replace some key technology to speed up the process of human development. This is the correct way to use magic.

They talked until the sun went down, and after they had dinner together, Roland went to his bedroom.

There is no nightlife to talk about in this day and age, people don't even have a word for it, and everyone goes to bed early. He also considered exercising his right as a prince to recruit maids to do the sport, but in the end he could not because he was too thin to speak.

As he lit the candle in his room, he could hear behind himself the sound of applause, then someone spoke to Roland, "It was a spectacular lecture, it was a spectacular one, I did not expect that His Highness the 4th Prince was actually a learned man. . "

It was the voice of an unknown woman. Instantly Roland could feel a cold sweat, only god knew how a stranger could enter his room without his knowledge, if not a murderer, what was he ?! He immediately ran towards the door, even before he had time to put his hands on the doorknob, he could feel a cold wind blowing near his ears. He found that the silver dagger was firmly inserted into the door, the distance from the dagger to his cheek was only one finger wide.