The sound of "gudonggudong" kept ringing, and the whole room was filled with strange smell. Shao Xun frowned and walked in slowly.

This room is not big and has not many furnishings. The most conspicuous one is the Dan Furnace, a water and fire tripod, that is, the lower part of the raw materials for gold and stone.

It is called "fire tripod", and the upper part is a device for collecting condensates after mineral sublimation. The "water tripod" of the sun is combined into water and fire tripod, which is called the combination of water and fire.

He has never seen this alchemy furnace before.

The most common one is actually a kettle with a cover on top, which is very similar to a medicine cauldron. After heating at the bottom, cinnabar (main ingredient mercury sulfide)

It decomposes into sulfur and mercury, called "gold liquid", then sublimates and condenses into the inside of the lid, and finally drips down, and re-reacts into mercury sulfide.

The whole is purer and is called "Return to the Dan".

What I practiced in front of me was the "golden elixir". The raw material was cinnabar bought by Shaofu, which had been heated for a long time.

"Bring it." Shao Xun pointed to a booklet on the table on the left side of the room.

After hearing the sound, Wang Danhu, who was refining the alchemy, turned his head slightly, and then lowered his head to continue observing the alchemy.

There were two Wang children in the room acting as assistants. One of them picked up the booklet and walked up to take it. The personal soldiers came forward to take it and handed it to Shao Xun:

Shao Xun looked at it separately and was slightly satisfied. This was according to his request.

Raw materials (cinnabar) record a series of data such as origin and weight.

The water and fire tripod also specifies size, shape and material.

There is also the process of alchemy, which is recorded every time.

Besides being satisfied, there are also dissatisfaction.

Shao Xun asked, "Why don't you record cold and heat?"

No one spoke, and after a moment Wang Danhu turned around and lowered his head and said, "Just watch the fire."

This is to distinguish the temperature by the color of the flame, which is relatively shallow and has a large error.

Shao Xun said, "Huainanzi says, 'Look at the ice in the bottle and you will know the coldness of the world'. There is also a saying that 'Raise soup to stop boiling'. You can take these two images, each with one end, and say 'cold end' and 'hot end'."

Speaking of this, Shao Xun pondered for a moment and said, "There is a 'vacancies' in "Nine Chapters of Arithmetic", do you know?"

Wang Danhu nodded.

Shao Xun nodded, educated people are good, and these words cannot be explained by the craftsmen.

The so-called "vacuum" means carrying, which is zero.

Later generations always saw Indians bragging about the concept of "zero" online, and only part of it was true.

"'Han Duan' is 'zero', and're Duan' is 'hundred'." Shao Xun said, searching for a while, and after seeing the pen, ink, paper and ink,

He hesitated for a long time, and finally made up his mind and said, "There are numbers on the other side of India-"

After saying that, he picked up the pen and wrote ten Arabic numerals 0 to 9 on the paper. These were the numeral shapes he was familiar with in later generations, but they were not the original shape, but it didn't matter.

This digital system was introduced to China in the Tang Dynasty in history, but almost no one uses it, there is no need, and I don’t know why. Anyway, he wrote it down first, and then briefly talked about the concept of carry. It was not complicated. Wang Danhu could see at a glance how to express and write numbers above 9.

"0 day 'zero', 100 day 'one hundred', do you understand?" Shao Xun asked.

Wang Danhu nodded.

"Since that's the case, do you know how much cold and heat are when refining the alchemy? I think there are hundreds, but I don't know how many. Think of a way to see if I can know how many." Shao Xun said.

Wang Danhu seemed a little dissatisfied and made a speech: "Why do you need to be so troublesome? You only need to look at the heat for refining alchemy."

But after she said that, she regretted it and her body trembled slightly.

Shao Xun was secretly happy after hearing this and was about to ask.

He sneered and said, "Do you know why you can't refine the true pill?"

Wang Danhu shook his head blankly.

"Because the cold and heat are not right. If the difference is between the first line, the elixir will not be completed." Shao Xun said, "Besides, the "qi pressure" is not right."

"What is 'air pressure'?" Wang Danhu said in surprise.

She hadn't heard of this word.

Shao Xun racked his brains and thought for a while, and said, "Scholars have the temperament, but strong people are unable to stand up, as if they are being pressed. This is called 'emphasis'.

However, what I just said is the pressure of our breathing."

Wang Danhu was confused again. He was as light as nothing, but could he suppress others?

Seeing her like that, Shao Xun sighed secretly, would he have to conduct a Maddleborg hemisphere experiment to prove the existence of atmospheric pressure?

"That's all." Shao Xun said.

After saying that, he looked at Cai Cheng, the supervisor of the Shaofu, who was following him, and asked, "May the Shaofu make glass water pipes?"

Cai Cheng thought for a while and said, "Okay."

Shao Xun nodded, looked at Wang Danhu again, and said, "If you don't believe it, you can fill the glass water pipe with water, place one end in the cauldron and the other end outside to see if the water column will move during the alchemy."

The glass is translucent and unclear, but it can still barely see the changes of the water column.

Cai Cheng agreed immediately.

He didn't know what the emperor wanted to do, just do it.

Shao Xun was a little confused.

In fact, in another era, even if he said so much, would it be useful? It may be a bit useful, but it is not very useful.

Why do people do these things? There is no reason.

So give them an endogenous motivation.

Alchemy is an endogenous motivation, and it is not small, because people really believe in this thing, and there are still many believers. Rich households can lose their money for alchemy, which shows their enthusiasm.

Shao Xun now tells them that your failure to refine alchemy is because of the details, namely, the temperature and air pressure are incorrect, and the difference between the first line leads to failure. So I find a way to develop some devices that can simply measure air pressure and temperature, and then refine alchemy.

If it cannot be refined, it must be that these devices are not accurate enough, so I will find a way.

Or if there are many impurities in the raw materials, find ways to identify the components and then remove the impurities.

Refining a golden elixir, prolonging life and even achieving Taoism is the endogenous driving force.

So, is there any external motivation? Of course there is.

I have been studying alchemy for most of my life and have not refined the real pill, but I have created a bunch of strange by-products, some of which can make money, which is the external motivation.

In addition, the imperial rewards are also external motivation.

The so-called "people lose their power" is only a part of the external motivation, that is, the court has no interest in scientific research, does not invest money, does not reward, and does not give officials. However, if the by-products can be sold, and there is still a strong obsession with refining the true pill in its heart, then there is still a part of the motivation to continue scientific research.

So Shao Xun tried every means to let them master scientific methods, rather than randomly refining alchemy based on their feelings.

Of course, people's interests and hobbies are also endogenous motivation.

For example, Yu Xi is a gentry in Yuyao. He lives a wealthy life, but he is willing to climb the mountain in the middle of the night to watch the stars, record the astrological signs, and calculate it for it. I am happy, do you care?

In this world, no matter whether his heirs value his hard work after they come to power, Shao Xun is ready to walk on two legs, and the endogenous motivation is the safety rope.

Even though the second generation of emperors had no interest in scientific research, at least some scholars were engaged in research. With their enthusiasm, they used their own money, scientific methods to record the process, summarize and propose theories, this is the focus of the next stage.

Before Shao Xun left, he took something from Cai Cheng and walked towards Wang Danhu.

Wang Danhu subconsciously wanted to retreat, but he didn't dare.

Shao Xun put a crude linen mask on her face and said, "There are a lot of erysipelas in this house, and wearing this object can reduce it."

Then he asked Cai Cheng to bring a pair of crinkle leather gloves and hand them to Wang Danhu, saying, "Wear this item when you use materials in the future. I will ask the young mansion to think of another way to see if this house can be more ventilated."

"I'm not convinced now, are you going to leave?" Shao Xun asked.

Wang Danhu lowered his head and said in a muffled voice: "No."

"People should cherish themselves. You are only thirty years old, so how many pills have you taken? If you get married in the future, can you still have a child?" Shao Xun said, "Your family has forgiven me. Do your work well, don't think too much."

After saying that, he smiled at her and turned around and left.

After leaving the "laboratory", Shao Xun stopped and asked Cai Cheng: "Do you think it's too troublesome to do this?"

Cai Cheng replied: "Your Majesty is a man from heaven who has come down to earth and knows a lot about nature. If you give me all your gifts, it will be beneficial to the world."

"You don't understand if you have it, you have it every time. Besides, I have taught you a lot." Shao Xun said with a smile.

"If parents love their children, they will have a profound plan for them." Cai Cheng sighed.

Shao Xun laughed: "You have been studying, otherwise you will not be able to say this."

The two gradually moved away.

Now, it's time to move forward with his next plan.

The purpose is to strive for more educated people to engage in various experiments.

Whether you say he cheats or tempts, it doesn't matter.

If you can "deception" one is one, give you the method, go and hunt yourself. If you can have the best "wild boar", "tiger" and "leopard" hunting theory, I will publish a book for you to become famous and spread it to all directions, so that more people can master more scientific and efficient methods.

Wang Danhu looked at Shao Xun's back as he walked away, silent.
To be continued...