Day 3.

It's still the same as the previous two days.

When everyone was seated, Li Zhong wrote a chemistry on the blackboard.

They seem to have been prepared.

But when I saw Li Chong write chemistry, I couldn't help but feel a sudden in my heart.

Su Shi and Li Chengqian glanced at each other, exchanged looks, as if to say, I knew that today must be new.

I saw Li Zhong say on it, "What is chemistry?"

Su Shi could guess what he said next, "I forgot too."

But this time, Li Chong didn't.

Instead, he said, "Chemistry, you can think of it as a science that can create new things. In Datang, everyone often likes to call it "alchemy". For example...... The tofu that is popular in Chang'an today is actually the product of the alchemy of the Huainan King of the Western Han Dynasty. Legend...... After King Huainan refined the elixir back then, even his chickens and dogs ate them, and they all became immortals, so there is a saying that a person who has attained the Tao of chickens and dogs ascended to heaven."

As soon as it comes up, it is a very impactful knowledge point.

Everyone was stunned.

"So, let's talk about the origins of chemistry. The origins of chemistry are different from each other in the East and the West."

"For the West, they study chemistry in order to get gold, so they call chemistry alchemy."

"There used to be a story that they were crazy about gold, and they all wanted to get rich overnight, so whenever they saw something with a little yellow, they wanted to use various methods to see if they could extract gold from it, so they ...... There is a very thoughtful little Langjun, and he has his eyes on human urine."

"He collected a lot of urine himself, put it in a bottle, burned it with a fire, and finally, after burning it all out, he finally got something that burned and glowed."

"The name of this thing is phosphorus, which is the ghost fire in folklore."

"Ghost fires usually occur on the battlefield, especially in places where many people have died and buried many people."

"The reason is because there is a lot of phosphorus in the human body, such as in urine."

"For the East, the origin of chemistry is the opposite. The West is full of poor and crazy people, hoping to get rich overnight, hoping to refine valuable gold. And in the East, people who generally play chemistry are rich and powerful, and they don't have to worry about food and clothing. The reason why they play chemistry is because they want to make themselves immortal, that is, to become immortals."

"Otherwise, the wealth that I have accumulated for several lifetimes will be useless when I die."

"It's just that the wish is good, so far, there is still no one who can live forever, but many people are still poisoned and died because of taking the pills refined by others."

"So, chemistry is the study of these things."

"Of course! Today, we don't learn how to alchemy, nor how to refine the elixir of immortality, because if you want to ask me, I don't know. Today, we need to be very rigorous in trying to understand the material makeup of the world."

"Through experiments, we will understand and explore the mysteries of this world step by step."

Let's talk about it.

Li Chong took out various tools from a portable wooden box.

Alcohol lamps, test tubes, beakers, glass rods, lime water, toner, rust, candles, glass covers, you name it.

In fact, he had already prepared this set of tools, but he had never had the opportunity to use them before.

Right now......

It's finally all on display.

Then Li Chong began the formal class, "Today, we will first study a gas that is closely related to us. carbon dioxide."

……

Li Chong has conducted a number of experiments to let everyone lock and understand this gas step by step.

In addition, it is also proposed that there may be some connection with this gas

, another gas.

The whole process is all reasoning and experimentation, but it's not boring at all.

And after the class is over.

This simply subverts their three views.

To be sure, there are at least two kinds of gas, one is carbon dioxide and the other is gas that is somehow related to carbon dioxide.

The nature of carbon dioxide, which can extinguish fires, can be spit out of a person's mouth, can be extracted from rusty iron powder, can make lime water turbid, and ...... There seems to be also weight, affected by gravity.

Even though this gas is invisible to the human eye, it is as if it were real.

This is like watching a mystery drama, which deeply attracted the interest of all of them.

So much so that in the end, Li Chong said that today's class was over, and they were still a little unsatisfied.

"Your Highness's teacher can do anything?"

On the way back, the crown princess couldn't help but say a little briskly.

In fact, she is relatively quiet.

Li Chengqian saw her happy appearance, and also smiled bitterly, "How do I know."

"You've probably learned it before, what's the other gas? It is said that it has something to do with people's lives."

Li Chengqian said, "This ...... That's not what the teacher taught me before."

"And what did he teach you?"

Li Chengqian said, "The laws of history."

「？」

Li Chengqian was afraid that she would continue to ask, so he said, "I just read more past history books and understand the truth of being a man."

"Oh."

When Su Shi heard this, she was not very interested in this. Because of this thing, normal people know, it's very boring.

"Your Highness, you say, will it be a new class tomorrow?"

"Maybe."

Li Chengqian was inexplicably proud, and then said, "With the teacher's style, it is completely possible to do so."

"But the concubine wants to hear more about chemistry."

Day 4.

Li Zhong brought a microscope.

The word creature was written on the board.

Of course......

There's not much that can be taught.

Just look at the little bugs in the water.

And......

If you study biology, you should go outside to learn, and you can't learn anything just by sitting in the classroom.

I told them that biology is the study of everything that is alive, such as form, living environment, and so on, and for example, mosquitoes, in the spring, mosquitoes have begun to increase, and then they use a microscope to observe the life of mosquitoes.

So what happens when you're done researching?

Of course, it's to find a way to get rid of mosquitoes.

Or, what to do if you encounter a beneficial insect.

Biology is such a science.

Even......

You can also study some long-lived creatures on the earth to explore the secret of their longevity, and even maybe discover the secret of immortality.

Of course!

Li Zhong just mentioned it casually.

It's just a matter of proposing some things that need to be studied by living things, and directions.

Like the anatomy and research, Li Chong didn't say anything, because he was afraid that they wouldn't be able to accept it.

Day 5.

Li Chong finally had nothing to teach.

But......

He also wrote the words "topography and climate" on the blackboard.