When encountering something that they don't understand, everyone often chooses not to believe it.

It's like the poor people in the Yangtze River Delta in the early 20th century, who relied on eating hairy crabs to satisfy their hunger.

If you tell him that in a hundred years, only rich people will be able to eat big crabs in this way, he will definitely "puff" when you are farting.

The stands next to the football field of Guanshishan Academy are also more interesting today.

Two hollow hemispheres together, but neither horse can pull apart?

If this hadn't really been done, then this thing would have been really incredible.

"Confucius Sacrifice Wine, in my opinion, it is time for Guozijian to consider setting up a Gewu Academy. Once these experiments of His Royal Highness the King of Chu are approved by His Majesty, then the development of Gewuxue will inevitably usher in a peak, although the spring of the imperial court did not assess these contents, but as long as the influence of Gewuxue is increasing, it will inevitably attract many people to learn. If we keep excluding it from the country, we may fall behind at some point. ”

Sima Caizhang looked at Li Kuan, who was directing the second experiment in the football field, with a complicated expression.

"Even if he Li Kuan proves that this air is pressurized, what is the use? Guozijian can increase investment in medicine, arithmetic and law, but the matter of Gewuxue should be put aside for a while. ”

Kong Yingda, as a traditional Confucian descendant, where is it so easy to accept the study of things?

However, Sima Caizhang also mentioned this, and he also knew that the possibility of Kong Yingda agreeing to him was almost zero.

"Smack!"

"Smack!"

Soon, the second round of experiments began in the football field.

However, this round of experiments has just begun.

One of the horses was even running too hard and was suddenly pulled by the cable and fell to the ground.

This makes the people in the stands feel how much pull the copper ball is undergoing.

"Big brother, should we make a bet, how many horses do we need to pull this copper ball apart?"

Li Tai's psychological quality is better than Li Chengqian's.

No matter how big Li Kuan's limelight is today, his impact on him is very limited.

On the contrary, this will only further set off the obscurity of the crown prince of the current dynasty.

"Humph!"

Li Chengqian ignored Li Tai and continued to stare intently at the football field.

In fact, he was also very curious in his heart.

Could it be that this kind of ethereal air can really exert such tremendous pressure on people?

Otherwise, why doesn't this copper ball move at all?

"Xuan Ling, what do you think is the point of Datang if Kuan'er really proves that there is pressure in the air?"

By this time, Li Shimin had basically believed Li Kuan's statement.

Continuing the experiment is nothing more than satisfying everyone's curiosity and seeing how many horses are needed to complete the task.

"This experiment alone can't bring anything to Datang. However, the theories generated by this experiment may be used to make some special equipment or promote the development of Gewu.

Although Wei Chen doesn't know how to use this theory yet, I believe that His Royal Highness the King of Chu and the students of the Gewu Academy of Guanshishan Academy must have a way to use it. Maybe it won't be long before we'll see some new equipment come out again. ”

Fang Xuanling is obviously more confident in Li Kuan, and his words can be regarded as very pertinent.

"Boom!"

Just as Fang Xuanling was talking to Li Shimin, the neighing of horses sounded again in the football field.

There are already three horses on the left and right, but the copper ball is still as steady as Mount Tai.

At this time, the mentality of everyone in the stands began to change.

Everyone began to wonder how many horses would be able to pull the copper ball.

Li Kuan didn't waste any time, six horses didn't work, and he immediately increased it to eight.

Eight horses are not good, and if you don't say a word, you can get ten horses.

Then twelve, fourteen.

But the bronze ball was still not pulled apart.

If it weren't for the props prepared in advance, so many horses would not have been able to contribute at the same time.

"Your Majesty, this time it's sixteen horses, if this copper ball can't be pulled away, then this so-called air pressure is really too terrifying."

Despite the scorching sun, the temperature in February is not too high.

But Fang Xuanling's forehead couldn't help but be cold and began to sweat.

Many people also held their breath and stared at the football stadium without turning their eyes.

"Smack!"

"Smack!"

"Smack!"

A platoon of auxiliaries brandished their whips at the same time, driving the horses forward with all their might.

I don't know if these horses were beaten out of anger, and the sixteen horses walked against each other, and they actually threw out a different momentum.

"Bang!"

When the cable was straightened, there was a loud bang in the football field.

Under the gaze of everyone, under the pull of sixteen horses, the copper ball finally split into two halves.

At the moment of separation, the loud noise startled everyone.

Even Li Kuan on the side jumped up vigorously.

Soon, though, he came back to his senses.

"Li Zhong, go over and see if this copper ball is really the merger of the two hemispheres."

In the stands, in order to avoid making an oolong, Li Shimin specially asked Li Zhong to go over to confirm and see if the copper ball had done anything.

Although with his understanding of Li Kuan, Li Kuan should not make such a low-level mistake.

But it's better to make sure, and maybe there are many people in the stands who have such thoughts in their hearts.

Li Zhong listened to the will, didn't say a word, and walked quickly to the copper ball.

I saw him stretch out his hands, bend down and pick up the two copper hemispheres, and look at them seriously.

The cross-sections of these two copper hemispheres are extremely smooth, apparently specially ground before.

Li Zhong breathed a sigh of relief.

In this case, it is clear that the two hemispheres did not have any direct connection before.

In fact, there is a black gasket between the two copper hemispheres, which can already preliminarily prove that the two hemispheres are not connected.

However, it is more appropriate to open it now and take a closer look.

"Ladies and gentlemen, this bronze ball will be displayed in front of the Gewu Building, as a landmark item of our Guanshishan Academy, and anyone is welcome to visit at any time."

When Li Kuan saw Li Zhong's performance, he naturally understood what he was doing.

Simply, take out this copper ball and display it, and completely dispel everyone's doubts.

"Your Majesty, the surface of the two copper hemispheres is extremely smooth, and there is no trace of prior connection. Although his subordinates still can't understand why the two copper hemispheres are combined, and after the air inside is pumped out, such a huge pull is needed to pull apart, but this experiment of His Royal Highness the King of Chu should be consistent with everything he said. ”

After Li Zhong returned to Li Shimin's side, he loudly said his confirmation results.

Li Chengqian, Li Tai, Fang Xuanling, Eldest Sun Wuji and others on the side naturally heard it clearly.

However, everyone's reaction is different.

"Today's first Datang Academic Exchange Conference is really extraordinary, and I have not come in vain. In the future, this kind of interesting event can be held continuously. ”

Li Shimin's remarks can be regarded as an official endorsement of today's activities and have been officially recognized.

This made Kong Yingda very envious, jealous and hateful.

However, in the past few years, in addition to participating in the compilation of basic books, he has not made any other contributions.

This made Kong Yingda's heart become anxious.

In the long run, won't the status of Confucianism deteriorate?

The first Datang Academic Exchange Conference was successfully concluded.

After Li Shimin left, the bigwigs of the DPRK and China also left Guanshishan Academy one after another.

However, the students in the academy gathered together enthusiastically to discuss today's three themes.

"Master, what is this air like? It can't be seen or touched, but it exists all around us. Sometimes we can smell the smell in the air, sometimes we feel that the air is moist, sometimes we feel dry, but to the naked eye, it is all the same. ”

Di Renjie stood beside Li Kuan and asked himself a question that he hadn't figured out for a long time today.

"Lord Wang, I see that there are more and more students, and they are all unwilling to disperse, why don't you just give a lecture to everyone and talk about the air problems that everyone is concerned about?"

Xu Jingzong was busy behind the scenes for a day today, and he also stood by Li Kuan's side at this time.

"Yes, Master, why don't you give a lecture to everyone? I don't know how long it was since I last listened to your lectures. ”

Liu Yuan also wanted to hear some new theories from his master.

"Okay, then while everyone is so interested, this king will simply share my understanding of air with you."

Li Kuan thought about it for a while and agreed.

In order to make the rapid development of physics and chemistry, it is necessary to improve the students' understanding of matter itself.

As a ubiquitous substance, gas is very troublesome to explain many things if you don't figure it out.

……

Although it was a temporary lecture, Li Kuan was not worried at all.

As long as you simply take out some common knowledge learned in junior high school and high school and tell you about it, it is enough to cause a sensation among everyone.

"You can take a look, this beaker in my hand is the most common one in the academy's laboratory, and this whale oil candle is also used by everyone every day. Before starting the lecture, let's watch a small experiment. ”

In the lecture hall, it became crowded again.

However, this time they were all students from Guanshishan Academy.

"Now I have lit this candle, and if no one pays attention to it, the flame will not be extinguished until there is no candle at last. So now I'm going to put this big beaker on top of the candle, and let's go ahead and see what will happen to this candle. Which of you came up and helped me with this action? ”

In order to let everyone personally feel that this candle and beaker are the most ordinary things, Li Kuan had a small interaction.

"I'm coming!

As soon as Li Kuan finished speaking, one of the students raised his hand and walked directly to the stage.

"Lord, this matter is the great Lang Li Desai of the Weiguo Gong, a few days ago he suddenly said that he wanted to come to Gewu Academy to study, and I agreed to it."

Xu Jingzong explained softly in Li Kuan's ear.

Li Kuan nodded and did not speak.

Soon, Li Desai picked up the beaker and looked at it, and then stared at the candle for a while, but found nothing, and then put the beaker on the candle.

In the large lecture hall, everyone stared at the candles in the beakers, but did not speak.

After a few minutes, the candlelight flickered inside.

There was no wind, but the flame was shaking.

This focused everyone's spirit on the candle.

"Ahh The candle is out! ”

Suddenly, someone screamed.

Principle, the beaker Lee's candle actually went out.

"Don't you think it's strange why the beaker is covered with a candle, and now the candle is suddenly extinguished? And the candle next to it, which is not covered with a beaker, is burning well? ”

Li Kuan was very satisfied with everyone's reaction, coughed lightly, and officially started the lecture.

"Is it because the burning of the candle has used up the air in the beaker, so it goes out?"

Di Renjie, who is good at thinking, thought of the vacuum in the copper ball when he combined the copper ball experiment just now, and thought that the beaker would also be a vacuum, so the candle was extinguished.

I have to say that under Di Renjie's questioning, many people feel that this seems to be a good explanation.

"If you run out of air, it's a vacuum. If that were the case, there would be no way to uncover the beaker. But you see, as soon as I moved, the beaker moved away. ”

Li Kuan said as he picked up the beaker.

In this way, Di Renjie's answer just now was completely overturned.

The air is under pressure, and if it is under a vacuum, it is impossible to uncover it by manpower.

"Could it be that there is something in this air that has something to do with the burning of the candle, because the beaker covers the candle, and when this part of the thing is consumed, it goes out?"

At this time, Lu Zhaolin, who had not spoken much, put forward a very novel point of view.

From Li Kuan's point of view, this question is basically a fact.

"This statement of ascension is quite interesting, and it does seem to explain this phenomenon better than what I just understood. If there are several things in the air, it can explain why the candle went out just now, and why the rotten eggs stink so much in the air when they are opened. ”

Di Renjie added.

With the two of them taking the lead, the originally quiet lecture hall immediately became full of people.

"Everyone, be quiet!"

After everyone discussed for a while, Li Kuan signaled everyone to stop the discussion.

"The significance of this experiment has been basically guessed correctly by some people just now. Whether it is the burning of this candle, firewood or honeycomb coal, it is necessary to consume a component in the air, and the king calls the ingredient required for this combustion oxygen.

What percentage of this oxygen is in the air? I hope you will explore this answer. Is there only oxygen in the air? The moment the beaker was unveiled just now, everyone must know that there must be more than one ingredient in the air. ”

Li Kuan didn't go around too many circles, and directly began to express his understanding.

"The king doesn't know how many gases are in the air, and the answer needs to be found. But from the experiment just now, I can easily uncover the beaker, which means that in addition to oxygen, there are other gases in the air that have a high percentage.

At the same time, everything else in the air may be different in different situations. There should be many gases in this world that we don't know about. Rotten eggs are so stink, could it be because of some special gas emitted from them?

The toilet is so smelly, could it be that there is some special gas in it? Or maybe there was an explosion in the mine of the honeycomb coal workshop before, could it be caused by some special gas in the air? These answers need to be found by you. ”

Although Li Kuan knew that there was nitrogen in the air, carbon dioxide, and some rare gases.

It is also known that the smell of eggs is due to hydrogen sulfide, and the coal mine explosion is due to methane.

However, if these things are directly spoken, there is no way to explain them.

Besides, it doesn't seem to be a good thing to pull out the seedlings too much.

Therefore, he simply finished half of the lecture, responsible for making various assumptions, and then let the teachings and students of Guanshishan Academy study them.

Li Kuan's assumptions have been compiled into a manual one after another, called "One Hundred Conjectures of His Royal Highness the King of Chu".