After arranging the production of flintlock guns, Chongzhen went straight back to the Imperial College.

The flintlock musket had been successfully built, and now it was time to develop the steam engine.

Finally, he had some spare time on the technology tree, so Chongzhen planned to order a few more at once.

However, Chongzhen also knew very well that steam engines and flintlock guns were not the same concept at all.

There are only a few main parts of a flintlock gun, but there are hundreds or thousands of parts of a steam engine.

Moreover, the flintlock gun can cross the river using the technology of the matchlock gun, but the steam engine is a new thing. There is no craftsman in the entire Ming Dynasty who knows how to build a steam engine?

Chongzhen only knew the working principle of the steam engine.

The working principle of a steam engine is to use the expansion of water vapor to push the flywheel to rotate and perform work.

There are three main components of a steam engine. The first is the flywheel and transmission mechanism, the second is the cylinder and reciprocating valve, and the third is the boiler.

Making a flywheel is definitely the easiest.

It's nothing more than sand casting and casting.

Don't worry about dynamic balancing, as long as it can rotate.

There is no technical difficulty in connecting the transmission mechanism of the flywheel.

Find a few skilled old blacksmiths who can even make bearings for you. It just takes a little more time to make bearings, and hinges are no problem.

There shouldn't be any problem building a boiler.

To put it simply, a boiler is a container with a fire underneath. After the water in the furnace cavity is boiled, it will enter the cylinder through the pipes and control valves, and then push the piston.

With tapping technology, there is no technical difficulty in making valves.

There is no problem whether the boiler is rolled out of iron plates or directly cast.

The most difficult thing to make is undoubtedly the cylinder and the piston inside the cylinder, but strictly speaking, it doesn't seem impossible. It just requires the old blacksmith to polish it bit by bit.

If you spend more time, you can always polish the cylinder and piston to a satisfactory quality.

As long as the first steam engine is built and started to operate, the rest will be easy to handle, because with the steam engine, building an industrial machine will no longer be a problem.

Chongzhen first drew the flywheel mechanism, cylinder, piston and furnace pot respectively.

Then try to use hinges and connecting rods to connect the flywheel to the cylinder and control valve.

When the steam enters the left chamber of the cylinder and pushes the piston to the right, the connecting rod will push the flywheel. When the connecting rod and the force arm acting on the flywheel become a straight line, the connecting rod will lose the driving force, but the flywheel will be under the action of inertia.

Continue to rotate, and then push the piston back through the connecting rod. At this time, the steam has to enter the right chamber of the cylinder.

Thinking of this, Chongzhen immediately opened a hole in the left and right chambers of the cylinder and added sliders on top.

After thinking about it, I opened a cavity under the middle of the slider and an exhaust hole in the middle.

In this way, the steam that gradually cools down after the work is completed can be discharged, and new steam can enter the cylinder.

Then the slider is also connected to the flywheel through the connecting rod, but the direction must be staggered with the piston. When the piston is at the far left, the slider must be at the far right. When the piston is at the far right, the slider must be at the far left.

Chongzhen briefly simulated the reciprocating motion of the piston in his mind and felt that it should be possible.

This was somewhat beyond Chongzhen's expectations. He originally thought it would take ten days and a half to draw the principle sketch, but he did not expect that it only took half a day to draw it.

But this is also related to the fact that the principle of the steam engine is too simple.

But in fact, the mechanical principles are often very simple. The difficulty lies in breaking the window paper.

Before this layer of window paper was pierced, people in the world could not think of a thing that never existed even if they tried to break the sky. But once someone pierced this layer of window paper, they would find that it was nothing more than that.

After confirming that there was no problem with the principle, Chongzhen began to draw formal drawings again. Since he did not have a pencil, he could only use a quill. Therefore, once he made a mistake, he could not modify it and had to cancel it and start over.

In the next few days, Chongzhen kept drawing pictures without leaving home.

Flywheels, cylinders, pistons, bearings, connecting rods, boilers, iron pipes and slides, etc., Chongzhen drew fake three-dimensional diagrams and marked dimensions for each item, and sometimes had to add cross-section drawings.

Chongzhen also thought about drawing three views directly, but no one could understand it.

Teach these illiterate blacksmiths in the Ming Dynasty how to read three views? Then forget it.

It took almost ten days for Chongzhen to finally draw a complete set of sketches of the steam engine.

After the drawings are drawn, the next step is to find a suitable candidate to build the steam engine.

There were not many talented people with scientific literacy in the Ming Dynasty. Fang Yizhi was one and Song Yingxing was also one.

Apart from the two of them, I'm afraid there is only Xu Guangqi, but unfortunately Xu Guangqi is already dead.

Just when Chongzhen was about to send someone to summon Fang Yizhi and Song Yingxing, Gao Qi sneaked in and said: "Your Majesty, Lord Fang and Lord Song want to see you."

"I was just trying to find the two of them, but they came to my door by themselves." Chongzhen smiled and said, "Xuan."

Gao Qiqian immediately raised his voice and shouted outside the Yilun Hall: "Xuan, the Gewu Department of the Ministry of Internal Affairs will give wisdom to Shi Zhongfang, and the Gewu Department of the Ministry of Internal Affairs will give an audience to Song Yingxing, the king of Shizhong."

Fang Yizhi and Song Yingxing came in quickly.

Behind them were several scholars.

These scholars also held a thick stack of books in their hands.

"My minister Fang Yizhi/Song Yingxing kowtows to the Holy One, may His Majesty be blessed with peace and blessings." Fang Yizhi and the two paid homage with a great salute.

"Pingshen." Chongzhen raised his hands and pointed at the pile of books and asked, "Is this the textbook you compiled?"

"Exactly." Fang Yizhi said, "It took more than two months to finally fulfill the Holy Order and compile the catalog of teaching materials for each subject, and also asked the Holy One to review it."

Chongzhen immediately ordered his scholars to submit the book.

Then pick up the first textbook above, which is a history textbook.

It's not bad. It uses a chronological history writing method, starting from the Three Sovereigns and Five Emperors period, and adds a lot of short stories. Students of the Imperial College will probably like to read this kind of history textbook.

Unfortunately, there is only a table of contents and the full text cannot be seen.

If it's all, you have to add detailed content according to the table of contents.

This workload cannot be completed by two people.

The second textbook is a medical textbook, which is divided into three parts: medicine, consultation, and medical treatment.

Fang Yizhi pointed to the medical textbooks and said: "Your Majesty, this catalog of medical textbooks was not compiled by ministers and others, but by Fu Shan and Wu Youke from the Medical Department."

"Well, it's pretty good." Chongzhen was quite satisfied with the medical textbook.

Turning to the end of the Jin Chuang chapter, Chongzhen discovered an even bigger surprise.

"Jin Chuang Intestinal Broken Syndrome? Jin Chuang All Disease Symptoms? Surgery is authentic?" Chongzhen simply couldn't believe it. In his impression, Chinese medicine seemed to only deal with internal medicine. However, after reading this textbook, he found that this was not the case at all.

, it turns out that surgery not only exists in the Department of Traditional Chinese Medicine, but it is also quite advanced.

Jin Chuang's article on intestinal rupture syndrome introduces intestinal anastomosis in abdominal surgery.

Jin Chuang's Symptoms also introduces in detail the surgical procedures for bone reshaping.

The authentic chapter on surgery even introduces in detail the anesthetic before surgery - Huixiangsan!

This is really an unexpected surprise, but the subject of traditional Chinese medicine is profound and profound, and it is useless to briefly dabble in it. Therefore, it is necessary to set up a special medical school in the Imperial College to train doctors.

Other students in the Imperial College do not need to study medicine.

It seems that Fu Shan and Wu will have to pay another visit to the Imperial College later.

While thinking this, Chongzhen continued to read the textbook.

But when he turned to the third textbook, Chongzhen's brows tightened.

Because this is a mathematics textbook, and it follows the same formula as ancient books such as Nine Chapters on Arithmetic.

That is, it is not written from the shallower to the deeper in terms of addition, subtraction, multiplication, and division, the four mixed operations, fractions, algebra... but it starts with solving specific application problems.

Chongzhen flipped through it briefly and found that there were almost hundreds of questions.

Moreover, these hundreds of questions are not from easy to difficult, but the difficulty is randomly distributed.

Turning to physics again, it is almost a simplified version of physics knowledge. It is just a piece of knowledge, completely unsystematic.

Chemistry is not much different, it is just a piece of small knowledge, which is a selection of Tiangong's creation, physics and some ancient metallurgical knowledge.

Seeing this, Chongzhen's brows had turned into a knot.

Such teaching materials are not systematic and are completely useless.

It can also be seen from this that the empirical disciplines of Chinese civilization are still very powerful.

However, the disciplines of logical system are appallingly weak. This is the main reason why in modern times, Chinese civilization has made little achievements in subjects such as mathematics, physics, and chemistry.

It seems that for mathematics, physics and chemistry textbooks, we can only rely on Bomig. I hope this foreign priest can fool Pascal and Descartes.

At this time, Chongzhen missed Tang Ruowang even more.

Tang Ruowang is really knowledgeable. He has dabbled in astronomy, mathematics, physics, chemistry and even medicine, and his attainments are quite extensive. He can be called a great talent.

Writing textbooks is a piece of cake for him.

It's a pity that Tang Ruowang chose to stay in Beijing.

I wonder if Jiannu will reuse Tang Ruowang?
To be continued...