I am the cook, but I am Li Er's son-in-law

As the first generation optical microscope.

It is different from the upside-down astronomical telescope-like microscope of later generations-it has a somewhat strange shape, and there are no eyepieces or objective lenses.

There is only one lens, inlaid on a copper plate.

The copper plate is upright, and at the other end of it, there is a small needle, which is used to put the observation object, and a mechanism is connected to the bottom, which can adjust the height and distance.

As for the lenses of the microscope...

That's all fired out, burn the glass and it will naturally form a ball.Of course, the lenses burned out in this way are very lucky.

At least this microscope, the five people who made it, found a craftsman and burned it for two months before getting it out.

In addition, they have another conjecture—that is, polishing the glass to a certain extent can also meet the requirements of the microscope lens, but... this has not been verified successfully.

The horsetail grass currently used for polishing cannot meet this demand.

They couldn't buy shark skin.

Shark skin is natural sandpaper, which is roughly equivalent to [-]-grit sandpaper, but it is inconvenient to buy these things in inland cities, and the price is too expensive.

With the help of Yin Xuan, the review speed of the new issue of the magazine is faster than before, and the publication time has not changed.

It's just...readers are watching.

These scholars are convinced of the level of knowledge of Li Lizhi and Li Shu. After all, the manuscripts that have been reviewed by them really have something to say. They have not been reviewed and cannot reach the standard.

But Yin Xuan is different.

Regardless of how high his level is, that's where his status lies.

The articles that were reviewed and passed by Mrs. Zhengyang sounded naturally worse than the articles that were reviewed and passed by Zhengyang.

Soon the magazine was promoted.

Articles about gas amazed them.

As for the microscope article, it surprised them even more.

Yin Xuan was also happy to let them open their eyes, and the microscope was first placed in the restaurant, and everyone can come and try it.

Naturally, the scholars would not give up this opportunity. One by one, they were lying in front of the counter, with their buttocks raised high, and their eyes half-closed, staring at one end of the microscope, observing the cicada wings on the needle tip on the other side.

Observation with the naked eye is a completely different experience from observation under a microscope.

In the past, it was just an adjective of "thin", but now it seems that it is crystal clear, full of a sense of beauty, and the lines on it are not as simple as the grid structure they imagined before.

Although... it's a little unclear, and my eyes feel sore after looking at it for a while.

But really doable.

Just when the scholars were playing with the microscope, each of them wanted to rush to use it, but they were afraid of breaking the thing, so they were cautious.

Yin Xuan finally met Ma Sanbao who wrote about oxygen and carbon dioxide.

It was an old man who was almost fifty years old, his complexion was not very good, his face was pale, and his figure was hunched. He took three steps and took two breaths, and coughed several times from time to time.

There is a candle in the wind, and it feels like I will go in minutes.

After he came over, he bowed and greeted: "The student has met Zhengyang Gong."

Yin Xuan waved his hands and beckoned him to sit down: "What's the matter with your health? Have you been ill since childhood?" Looking at his appearance, Yin Xuan thought of Empress Changsun.

He was even worse than Empress Changsun—at least when Empress Changsun was not sick, her complexion was rosy and shiny, and she looked no different from normal people.

If so... it's not suitable to study these things.

Yin Xuan still can't let a person study a thing, and use his life as the price and bet.

"Thank you, Mr. Zhengyang, for your concern." Ma Sanbao was slightly agitated, which made him gasp several times, "It's not a gas disease, but the root cause of the disease caused by researching exhaust gas a few days ago."

Yin Xuan had a not-so-subtle premonition in his heart.

Ma Sanbao paused, then continued, with a somewhat emotional expression: "The exhaust gas is only harmful to the human body, and the students only felt dizzy at first—I thought it was because they hadn't slept well the previous nights."

"But later, his body became weaker and weaker, and he finally passed out. If the teacher hadn't discovered it in time, the student might have died there."

"But because of this, the root cause of the disease has fallen. The root cause of the disease is blood in the stool and vomiting blood. The heart and lungs seem to be much worse. The article was dictated by the students and written by the teacher himself."

Carbon dioxide poisoning, this is...

"It's not easy to survive." After holding back for a long time, Yin Xuan choked out such a sentence.

According to Ma Sanbao's description, this is a sign of severe carbon dioxide poisoning. At his age, he can survive. It can only be said that he is well maintained on weekdays, um... In his previous life, he was probably a great benevolent person who saved dozens of lives.

Ma Sanbao also had a face of approval, clenched his fists: "It's just that the root cause of this disease may be followed for a lifetime."

What are the sequelae of carbon dioxide poisoning?

Neurasthenia, epilepsy, paralysis... oh, the last one is a disease, not a curse.

That's horrible!
Yin Xuan's gaze became more sympathetic: "Looking at your clothes, you don't seem to be a scholar. May I ask what kind of work you do?"

Talking about this topic, Ma Sanbao was a little proud. He puffed out his chest, covered his mouth and coughed for a while before answering: "The student is a doctor."

"Cough cough cough..."

Because he was too excited, he coughed again after half a sentence.

The doctor in Ma Sanbao's mouth is naturally not the doctor in the court—it is a name for the profession of "doctor".

Doctor?
Researching this thing can make it clear.

Ma Sanbao finally recovered from his cough, and continued: "The student is the disciple of the old god Sun. He has studied medicine as a teacher for more than 27 years, and it can be regarded as a small income."

Sun Simiao's disciple?
Yin Xuan paused, touched the table, thoughtfully: "So you study these things, in fact, for medical skills?"

Ma Sanbao was also taken aback for a moment, he thought about it for a while, and frowned slightly: "What does Mr. Zhengyang mean, these things that the students study have nothing to do with medical skills?"

Yin Xuan shook his head: "In a macro sense, it can't be said that it doesn't matter, but if it's just the kind of medical skills you understand, then it doesn't matter."

Ma Sanbao's eyes straightened, a little confused.

Yin Xuan quickly comforted him: "It can't be said that it's useless, at least everyone knows that when heating or burning things in winter, you should do a good job of ventilation."

Ma Sanbao's eyes became straighter.

These things... don't need his research, they are all known for a long time.You don't have to know why to do something.

But soon he adjusted his mentality.

A man aged to fifty can hardly be considered a qualified person if his mentality is broken because of the fact that he may be doing nothing for nothing.