Release that Witch

19. Chapter 19 lectures

    The first rain after entering the winter finally fell, and it was two days.

    Roland leaned back at his desk and looked out at the small town outside the window. The rain was rolled up by the wind, and one by one was shot on the glass, causing ripples. Under the refraction of the ripples, the outline of the small town becomes distorted. The extension of the house and the street is curved and deformed, and it will not be adjusted in the past. Due to the lack of effective drainage measures, the water slab on the staggered stone slab runs across the river, looking like a lot of rippled creeks.

    The mountains and forests in the distance are covered by water mist, which is looming like a human world.

    If such a landscape is modern, it is definitely a tourist attraction, and now Roland wants to see the steel and cement jungle. The construction of the city wall had to stop when it rained, which made him a little bit fascinated by the success of the previous day’s successful “dismissal” stronghold envoy.

    “You just said that the air around us is made up of many gases, really?”

    The clear voice interrupted Roland’s thoughts, and Anna asked with her pretty blue eyes.

    “Cough cough, Miss Anna, you should use honorific words when you call on Your Highness,” the Chief Knight reminded.

    “Not so particular,” Roland turned. “She is my student now.”With nothing to rain, he called the two witch and Carter to listen to his class—yes, he decided to open a natural science popularization class. Stonemason Karl’s school education inspired him, even Stonemason can open a school, not to mention his own engineering mechanical dog. Why is there discrimination, is it because of ignorance? Universal education is the most effective means of promoting the development of civilization in any era.

    He originally wanted to call the Assistant Minister, but the other party was busy with government affairs recently, and the rumor declined. Somehow, Roland felt that Barov was particularly motivated after the winter, and almost one person provoked Border Town’s day-to-day management.

    When he heard new knowledge to learn, Anna immediately became radiant, and his eyes seemed to glow. Nana saw that she didn’t need to treat all kinds of experimental animals, and she was very happy. Carter was holding a pair of idle and idle, and came to listen to you with a good look.

    But it didn’t take long for the class to start, and Knight’s eyes were gone. Nana is also ignorant, staring at the natural and scientific words. Although Anna seems to understand half, she still tries hard to write down everything she hears. Roland had to pause and let the three digest a moment.

    For Anna’s question, he smiled and nodded. “Of course, although they look the same.”

    “His Highness, I don’t understand, since it looks the same, how do you know that it is a different gas?”Carter questioned this.

    “I can prove it to you.”

    Roland knows that if light is spoken in words, I am afraid that most people will be confused by these mysterious and mysterious theories. He decided to use a simple experiment to arouse everyone’s interest.

    A candle, a glass, a tub, a bowl of clarified lime water – this is something he prepared in advance, even though the glass is light brown at this time, far less transparent than the later beaker, barely enough to use It is. After all, this simple test does not require observation of the change process.

    Roland has done it beforehand. The test results prove that although there is magic power in the world, the rest of the natural rules are still the same as the earth. He let Anna ignite the candle and set it in the tub.

    “Combustion requires the consumption of a gas, which is also closely related to all life. If we stop breathing, it will be like this candle. Look at it,” Roland buckled the glass on the candle, the flame swayed twice and quickly went out.

    “It runs out of air, Your Highness, it’s no surprise,” Chief Knight said. “Without the air, we will of course die, like falling into the water.”

    Nana nodded again and again.

    “So, do you think there is nothing in the cup?”Roland poured lime water into the tub while asking, the waterline quickly drowned the cup, and finally stopped at one-half of the cup.

    This experiment is so classic that most elementary school teachers like to use it as an enlightenment test for natural interest classes. Roland still remembers the shock and shock that the teacher gave to the presentation and explanation at the desk, and he has embarked on the road of science and engineering.

    He gently lifted the cup to the corner, and saw a few bubbles instantly burrow from the mouth of the cup and emerged from the water.

    Then, the clarified lime water showed a slight turbidity, and a little white suspension spread slowly from the mouth of the cup.

    “If there is nothing in the cup, we won’t see bubbles and changes in the water. This means that there are at least two different gases in the air. In fact, the candle burns only a part of the air, while the other part is unable to participate in the combustion. Although it is as colorless and tasteless as the former, its nature is the opposite. ”

    “like……It seems to be the case,” Carter thought for a long time to figure out the relationship between the two. “But what do you know about this? ”

    “If we can get the former gas, we can burn the flame for a longer time. Similarly, if we get the latter gas, we can quickly extinguish the flame!”Anna suddenly said.

    It is a genius. Roland admires the bottom of heart. Although there is a small fallacy, it can be immediately associated with separation and purification from the different properties of the gas. This idea is absolutely genius. To know that she has not received any systematic modern education, the quick thought of this is enough to show that her logic is beyond ordinary people – at least far better than her own Chief Knight.

    “It’s a good thing. Since humans have learned to use fire, they have been separated from animals, and the origin is just an accident. Perhaps the lightning ignited the trees, perhaps the stone that hit the burst of Mars caused the flame. But if no one notices this, no one tries to use it. We are still like the beast,” he said. “This experiment is to tell you that curiosity and thinking are the driving force for human progress. There are many such potential forces in nature, just waiting for us to discover and use. ”

    After some words, Carter was still a dubious look, and Nana belonged to the type of unconsciousness, and looked straight at Roland. Only Anna looked down and thought like something.

    Well, Roland sighed, indeed, the idea of ​​being too advanced will not bring shock, it will only make people feel puzzled. The height of thought determines their impossible understanding of the power of that power, and only when the real thing is really in front of them will they know how magical the hidden power in nature is.

    At this time, the kettle hanging on the mantelpiece rang, which was the sound of steam hitting the lid.

    “Ah, the water boiled,” Knight walked over and took the kettle out with a fork, and the sound soon stopped. He wrapped the handle with a rag and lifted the pot to fill the water in the cups.

    For example, Roland reached for the cup and felt the temperature from the wall. From the first day the fire was used, its principles were ripe. “Boiled in boiling water, countless people have witnessed it, practiced it, but did not expect that this gently rising water vapor can also contain amazing energy.

    This motive force, which will be mastered by humans hundreds of years later, has changed human history in a very short time. Although the principle is simple, it is limited to the process problem, and it is not the first choice for most people to farm. It can be different, he thinks, there is a witch in this world. Use magic power to kill the battle, but it is the idea of ​​the barbarian…It is the correct way to use magic power to create and replace some of the key processes that contain the civilization process.

    After chatting about the sun setting and eating dinner with everyone, Roland returned to his bedroom.

    There is no night life in this era. If you don’t create people, everyone will sleep earlier. He also considered whether to use the prince’s privilege to recruit a maid to do sports, but ultimately it was too thin to say.

    Just lit the room candle, he heard a few applause from behind, and then someone spoke. “It was a special lecture. I didn’t expect that His Royal Highness was a learned scholar.”

    It is the voice of a strange woman. Roland’s cold sweat instantly popped out, and strangers who couldn’t see the ghosts in their own room, except what the assassin would be! ? He pulled his leg and rushed to the door. He hadn’t had time to put his hand on the doorknob, and a cold wind swept from his ear. When he came back, a silver-handled dagger was firmly inserted into the door panel, and he was only one finger away from his cheek.