The Ming Dynasty started with saving the eldest grandson

Chapter 283 Gramophone

Chen Jingke wanted to teach students in person and change their understanding of natural subjects. The news spread and aroused the curiosity of many people.

Many gentlemen stood at the windows and listened, wanting to see what he was going to do.

Although the students didn't know what was going on, the dean who rarely appeared in the classroom suddenly appeared in the classroom, and they all felt that something was about to happen.

Especially today he has to teach everyone a nature lesson.

It’s hard not to be reminded of what happened a few days ago.

Especially Tang Xian and others were even more panicked due to their guilty conscience.

In front of others, they can act like the children of powerful people, but they can't act like they are in front of Chen Jingke.

After all, Chen Jingke is a proper 'other people's child' and can be on equal terms with their fathers and ancestors.

In the academy, he is also the dean.

"If people outside the well laugh at them, isn't it a kind of ignorance and arrogance?"

"It's not their fault, because the world they can see is only so big. It's the environment that limits their vision."

Chen Jingke picked up the chalk, turned around and drew two circles, one large and one small, on the blackboard.

"It's like an ant laughing at an elephant, what's the use of having such a big body."

"Inside the circle is the knowledge we already know, and outside the circle is the knowledge we have not yet mastered."

In this case, they naturally cannot be stubborn.

Maybe they don't understand the deeper meaning, but at least they know that it is the right thing to do.

“The more we know, the more unknown we can see.”

Tang Xian and others' faces turned red, these words were too harsh.

Chen Jingke threw the chalk on the table and said, "Okay, now that we've talked about the big ideas, let's talk about something practical."

This metaphor is very vivid, and everyone feels that they have learned a lot.

"So, in the eyes of a truly knowledgeable person, there are too many things that I don't understand. I am just a beginner, so what should I be proud of?"

However, Chen Jingke did not cause trouble for them, but said with a smile:

On the contrary, the gentlemen listening at the window all showed thoughtful expressions.

But Tang Xian and others didn't take it seriously. If it's useful, it's useful. If it's not, it's useless.

"Arrogance is a taboo in learning."

"A truly moral scholar is always humble."

Chen Jingke changed the topic and said, "Actually, what I just said was wrong."

"Just like when I laughed at people who don't understand nature, it's also full of arrogance."

Tang Xian and others were even more frightened, and they started to look for trouble.

I understand a lot of things.

Everyone was stunned for a moment, what do you mean?
"The sky in the eyes of a frog at the bottom of a well is only as big as the mouth of a bowl."

"You haven't noticed yet. The less you know, the less unknown we can see."

Most of the students were in a daze. For them, this principle was too profound.

No matter how many great things you say, you still can't explain the use of nature.

"People outside the academy are even more skeptical about this, and many people mock it in person."

"The problem is not with you, but with our failure to do our job properly."

"Whenever an elephant looks down at an ant, he loses."

They had heard too many legends about the dean, and today they finally saw it, and it was indeed very powerful.

"Nature is a completely new subject, and it is normal that you cannot understand its meaning."

The students, in particular, looked at Chen Jingke with admiration.

The most important thing is that they know very well that if there is a conflict, their elders will not support them.

"I proposed the establishment of natural subjects. Many people may not understand what the use of this thing is."

Comparing status, comparing ability... No matter what the comparison is, they can't compare.

"It's not that I'm generous, or that I don't dare to refute, it's that I don't bother to refute."

Both the gentlemen who were observing and the students in the classroom all nodded with deep understanding.

"I always laugh it off, never defend or refute."

Not only is it useless to complain when you go home, there is a high chance that you will be beaten up by your elders.

"Confucius said that when three people walk together, they must have me as their teacher. This is the mentality that a true great sage should have."

"On the contrary, people with low knowledge can see little unknown, so they think they know everything, so they develop arrogance."

"Haha..." Everyone burst into laughter.

Everyone's hearts trembled. It's coming, it's finally time to settle accounts.

Tang Xian and others were also beating drums in their hearts.

Obviously, everyone thought he was being sarcastic.

"I'm not being sarcastic, this is indeed what we did not do well enough."

"Actually, natural science is a very profound subject. The knowledge you have learned in textbooks is just the surface."

"The purpose is to enlighten you and give you a preliminary understanding of nature."

"It's just because it's too simple, and it doesn't let you understand the usefulness of this subject."

“The real approach is to let you understand the usefulness of this subject from the beginning.”

"In this way you will pay attention to it, become interested, and there will be no questions later."

"That's why I said, this is because we didn't do a good enough job, and the problem is not with you."

Hearing this, everyone admired him even more and liked Chen Jingke even more.

The dean is really kind and humble.

Tang Xian and others breathed a sigh of relief, but then felt embarrassed.

"It is said that interest is the best teacher. Today I will teach you this lesson to let you know what the use of nature is."

Everyone couldn't help but become curious, wanting to know what he was going to do, and even more curious about what was so clever about nature.

Chen Jingke opened the box he brought over without any more ink marks and took something out of it.

It is the temperature difference engine, a toy that has become popular among aristocratic groups in the past two years, and is widely used in fans.

Is this what he meant?

Everyone couldn't help but feel a little disappointed.

The temperature difference engine is indeed amazing, but everyone has seen it so much that it has lost its shocking power.

What's more, besides being able to drive a small fan to blow the air, this thing is really useless.

But they soon knew that their thinking was too simple.

Chen Jingke took out another thing from the box.

A very strange thing.

Below is a platform made of wooden boards with a copper pole on it.

A paper cup is fixed horizontally at the top of the pole, and a glass cup is also placed horizontally below the paper cup.

There is a toothpick stuck in the end of the paper cup, and the other end of the toothpick is placed on the glass.

Chen Jingke placed it together with the thermoelectric engine.

A track made of a rope connects the wheels of the thermoelectric engine to the wheels of another thing.

Everyone couldn't help but wonder, what is this?
Are you going to use two cups to show us the use of nature?
Chen Jingke could naturally guess what everyone was thinking and said mysteriously: "Don't worry, you will know soon."

"Now I need someone to cooperate with me in doing experiments... Well, Tang Xian, it's just you, come here." Tang Xian didn't hesitate, got up and walked over:

"Dean, what do you need me to do?"

Chen Jingke picked up the teapot and poured hot water into the temperature difference engine:
"You know about the temperature difference engine. When the cup starts to rotate later, you can speak loudly to the paper cup, and you can say whatever you want."

Talking to a paper cup? Everyone couldn't help but become curious, what is this doing?
Although Tang Xian was confused, he was not afraid and said, "Okay, I understand."

Chen Jingke prepared everything and asked again:

"Are you ready? I told you to start talking loudly to the paper cup. The voice must be loud."

Tang Siam cleared his throat with a dry cough, moved closer to the paper cup and said, "Ready."

Chen Jingke pressed his finger on the wheel of the temperature difference engine and gently moved it, and the wheel started to rotate.

The wheel drives the rope track, and the rope track drives the wheel at the other end, and the two cups begin to rotate.

"start."

Tang Xian shouted loudly: "The Ming Dynasty will be victorious, the Ming Dynasty will be victorious..."

Chen Jingke kept his eyes on the glass and saw clear marks made by the toothpick on the glass.

He embedded a diamond chip on one end of the toothpick, which could leave marks on the glass.

After hundreds of experiments and dozens of different materials, we finally found the most suitable thing.

It wasn't until the toothpick was about to reach its end that he reached out and pressed the thermoelectric engine.

"Okay, you can stop."

Tang Xian stopped then and looked at him with a puzzled expression.

"Dean, is this all right?"

Everyone else has the same question, is this it?

Chen Jingke smiled and said, "Don't worry, you will know soon."

After speaking, he reset the glass and said to everyone: "Now is the time to witness a miracle. Please stay quiet and don't make any noise."

Everyone subconsciously held their breath.

Chen Jingke released his fingers from holding the engine, and the glass started spinning again.

Just when everyone was confused, they heard a voice coming from the paper cup:
"The Ming Dynasty will be victorious... The Ming Dynasty will be victorious..."

Although the voice was weak, noisy, and somewhat distorted, one could still tell that it was Tang Siam's voice.

Everyone opened their eyes and mouths wide, looking at this strange thing in disbelief.

Tang Xian was so frightened that he took several steps back, his face turned pale.

I don’t know who was the first to exclaim: “Monster, Tang Siam’s voice was taken away by this monster.”

Tang Xian retorted subconsciously: "No, no, I can still speak."

After saying that, I realized, yes, how could my voice appear in the paper cup?
What kind of magic is this?
"Buzz..." The classroom became noisy as if it was exploding.

The gentlemen listening outside couldn't help it anymore, opened the door and walked in.

Cheng Yimin took the lead and said excitedly and uneasily:
"What is this and how is it done?"

Everyone else also looked at Chen Jingke, waiting for his answer.

Chen Jingke did not answer directly, but said: "Quiet."

After shouting several times, the classroom became quiet, and all the students looked at him in awe.

Chen Jingke then said: "This is something made using natural knowledge. I call it a gramophone."

“As the name suggests, sounds can be recorded and played back.”

"As for the principle...it's too complicated for you to understand. All you need to know is that sound will cause objects to vibrate."

"You can try this yourself, it's not complicated."

"The paper cup functions as a speaker. It can concentrate sound, enhance vibration, and also amplify the sound."

"Speak loudly to it and the vibrations will become clearer and stronger."

"And the vibration of sound has a frequency...it has a rhythm, it is not a random vibration."

"Did you see this needle? It's a pen that records the rhythm of sound vibrations."

"And the glass is the paper that records this rhythm."

"There is a diamond chip at the end of the needle. Everyone knows that diamond can scratch glass, and it can also carve marks on the glass."

"When the needle vibrates, it leaves corresponding marks on the glass."

"When we reset everything and the needle follows the traces carved before, it will produce vibrations with the same rhythm..."

"The vibration is transmitted along the needle to the paper cup, which is the speaker, and the same sound will be made..."

Everyone was confused, but at least one thing they understood was that this was not a magic spell but a tool that could be mastered by others.

Seeing everyone gradually returning to normal, Chen Jingke smiled and said:

"Now, do you feel the charm of nature?"

Everyone nodded repeatedly and said in twos and threes: "I feel it."

Even Tang Xian, Xu Zengshou and others are the same.

This shock is really too great.

Recording sound is simply a miracle.

Chen Jingke was very satisfied with the effect and said: "Now this gramophone can only record a few sentences. The sound is small and unclear, so it is not very practical."

"But it's not a problem with the gramophone, it's a problem with our technology."

"We shouldn't laugh at it and think it's useless because of these shortcomings."

“The real right thing to do is to find ways to improve it.”

"One day, we will be able to build a gramophone that can record for a quarter of an hour, and the sound will be as clear and loud as talking face to face."

"We can burn music in it. If we want to listen to music, we don't have to go to a musician. We can just take out the gramophone and listen to it at any time."

“You can also record the lessons in it and listen and learn over and over again until you understand.”

“We can also record our voices and pass them on to future generations.”

"In this way, although we are no longer here, our voices remain in the world."

Upon hearing this, everyone present's eyes lit up.

Still the same sentence, for the Chinese people who respect ancestor worship and are good at recording history.

Leaving a name in history and leaving something behind are all major events worthy of attention.

Being able to record one's own voice and pass it on to future generations is enough to make countless people crazy.

At this moment, the gramophone was given a higher meaning.

At this time, Tang Xian stepped forward and said with shame: "Dean, I was wrong. I shouldn't despise nature."

Chen Jingke was very pleased and said, "Do you remember what I just said? It's normal for you to question."

"We didn't make this clear, so you don't need to apologize for that."

"But you should indeed apologize, but not to me, but to Mr. Fang."

"Because he is your teacher, respecting teachers is a basic quality."

"You can question natural subjects, but as a student you should not offend sir."

Tang Xian nodded, bowed to Fang Guangjin and said, "Sir, I'm sorry."

Fang Guangjin smiled and said: "Knowing your mistakes can make a lot of improvements. I also made mistakes. I failed to let you understand the mysteries of nature."

Chen Jingke was very happy that the problem was solved.

(End of this chapter)