Release that Witch - Chapter 19

[Chapter 19 Lectures]

The first rain after entering winter finally fell, and it lasted for two days.

Roland leaned against his desk, looking at the hazy town outside the window.

The rain was blown up by the wind, hitting the glass one after another, causing waves of ripples.

Under the refraction of the ripples, the outline of the town became distorted.

The extension of houses and streets is bent and deformed, and it is no longer regular in the past.

Due to the lack of effective drainage measures, water flows across the criss-crossed stone roads, which look like many rippling streams from a distance.

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

If this kind of scenery is placed in modern times, it must be a tourist attraction, but what Roland wants to see now is the steel and concrete jungle.

The construction of the city wall had to be stopped when it rained, which made his joy at successfully “persuading” the emissary of the fortress the day before yesterday a little less.

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

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

“Ahem, Miss Anna, you should use honorifics when addressing Your Highness,” the chief knight on the side reminded.

“Don’t be so particular,” Roland turned around, “she’s my student now.” Taking advantage of the rain, he called the two witches and Carter to listen to his class—yes, he decided to open a natural course. Science popularization class.

The stonemason Carl’s school inspired him. Even a stonemason can open a school, not to mention that he is a majestic engineering mechanical dog.

Why is there discrimination? Isn’t it because of ignorance?

Universal education is the most effective means to promote the development of civilization in any era.

He originally wanted to call the minister’s assistant, but the other party was busy with government affairs recently, so he politely declined.

For some reason, Roland felt that Barov was particularly energetic after the winter, and almost single-handedly provoked the daily management of Border Town.

Hearing that there was new knowledge to learn, Anna immediately became radiant, and her eyes seemed to light up.

Nana was also very happy to see that she didn’t need her to treat all kinds of experimental animals, while Carter came over to listen with the look of being idle and ready to mess around with you.

But not long after the class started, the knight’s eyes became slack.

Nana also looked confused, staring at the words nature and science in a daze.

Although Anna seemed half-understandable, she still tried hard to write down everything she heard.

Roland had to pause and let the three of them digest for a while.

Regarding Anna’s question, he smiled and nodded, “Of course, even though they look the same.”

“Your Highness, I don’t understand. Since they all look the same, how do you know they are different gases?” Carter questioned this.

“I can prove it to you.”

Roland knew that if he just told it in words, most people would probably be confused by these mysterious-sounding theories.

He decided to arouse everyone’s interest with a simple experiment.

A candle, a glass, a wooden basin, and a bowl of clarified lime water – these are things he prepared in advance, although the glass at this time is light brown and far less transparent than the beaker of later generations, it is still enough for barely use up.

After all, this simple experiment does not need to observe the process of change.

Roland had done a pre-test before, and the test results proved that although there is magic in this world, the rest of the natural rules are still the same as the earth.

He asked Anna to light the candle and stand it in the tub.

“Combustion needs to consume a kind of gas, and this gas is closely related to all life. If we stop breathing, we will be like this candle. Pay attention,” Roland put the glass on the candle, and the flame shook twice, and soon went out.

“It runs out of air, Your Highness, it’s not surprising,” the chief knight said disapprovingly. “Without air, of course we will die, such as falling into the water.”

Nana nodded repeatedly.

“So, do you think there is nothing in the cup?” Roland asked as he poured the lime water into the tub. The water line quickly covered the mouth of the cup, and finally stopped at half of the cup.

This experiment is so classic that most elementary school teachers like to use it as a primer for nature interest classes.

Roland still remembers the shock brought by the teacher’s demonstration and explanation on the desk at that time, which made him embark on the road of no return to science and engineering.

He gently lifted a corner of the cup, only to see a few bubbles bursting out of the cup and out of the water.

Then, the clear lime water became slightly turbid, and a little white suspended matter slowly spread from the mouth of the cup.

“If there was nothing in the cup, we would not see the bubbles and the changes in the water surface. This shows that there are at least two different gases in the air. In fact, the burning of the candle consumes only part of the air, and the other part, which cannot be Participating in burning. Although it is as colorless and odorless as the former, its nature is completely opposite.”

“It seems…it seems to be the case,” Carter thought for a long time before he understood the relationship between the two, “but what’s the use of knowing this?”

“If we can obtain the former gas, we can make the flame burn longer. Similarly, if we obtain the latter gas, we can quickly extinguish the flame!” Anna said suddenly.

It’s a genius, Roland praised from the bottom of his heart. Although there is a small fallacy, but the idea of separation and purification can be immediately associated from the different properties of the gases. This idea is definitely a genius level.

You must know that she has not received any systematic modern education, and being able to quickly think of this is enough to show that her logical ability is beyond ordinary people – at least far better than her own chief knight.

“It is true that since humans learned to use fire, they have been separated from animals, and the origin is nothing more than an accident. Perhaps it was lightning that ignited the trees, or perhaps sparks from the impact of stones caused the flames. But if no one notices This point, no one tries to take advantage of it, we are still like wild animals,” he coaxed, “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, as long as Let’s find out and use it.”

After speaking, Carter still had a dubious expression, while Nana belonged to the type who didn’t know what was going on, and stared at Roland blankly.

Only Anna lowered her head, as if thinking about something.

Well, Roland sighed. Indeed, an idea that is too advanced will not bring shock, but will only make people feel confused.

The height of their thoughts determines that they cannot understand the power of that kind of power. Only when the real thing is really placed in front of them will they know how amazing the power hidden in nature is.

At this moment, the kettle hanging on the mantelpiece rattled, the sound of steam hitting the lid.

“Ah, the water is boiling,” the knight walked over to take out the kettle with a fork, and the sound stopped quickly.

He wrapped the handle with a rag, and filled everyone’s cups with a pot.

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For example, this one, Roland reached out to hold the cup, feeling the temperature from the cup wall.

From the first day that fire was used, its principles were mature.

“Boiling water” has been witnessed and practiced by countless people, but they never thought that the gentle rising water vapor can also contain amazing energy.

This driving force, which will only be mastered by human beings after hundreds of years, has changed human history in a very short period of time.

Although the principle is simple, it is limited to technical issues and is not the first choice for most people to farm.

But he is different, he thought, there are still witches in this world.

Using magic power to fight and fight is just the idea of barbarians… Using magic power to create and replace some key crafts that curb the progress of civilization is the correct way to use it.

After chatting until the sun went down, and having dinner with everyone, Roland returned to his bedroom.

There is no nightlife at all in this era. If there is no human being, everyone will go to bed earlier.

He also considered whether to use the prince’s privilege to recruit a maid to do sports, but in the end he couldn’t say it because his skin was too thin.

As soon as he lit the candles in the room, he heard several applause from behind him, and then someone spoke, “It’s really a unique lecture. I didn’t expect that His Royal Highness, the Fourth Prince, is actually a learned man.”

It was the voice of a strange woman.

Roland’s cold sweat broke out in an instant. A stranger who could appear in his room without anyone noticing, what else could he be except an assassin!

?

He rushed towards the door, and before he could put his hand on the doorknob, a gust of cold wind blew past his ears in an instant.

When he came back to his senses, a silver-handled dagger was firmly inserted into the door panel, and the dagger was only a finger-width away from his cheek.

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[End of this Chapter]