People in Datang have been expelled from school

Chapter 1170 Pumpkin Meal

Listening to Li Zheng's words, Xu Jingzong thought with his hands in his sleeves and said, "We'll be there in a few days."

After speaking, Xu Jingzong thought for a while and said, "Isn't all the grain in Lingnan used as fodder?"

Li Zheng said with emotion: "According to the grain consumption of our current farms, the grain in Lingnan is more than enough to be used as feed. If there is too much grain, it cannot be wasted. Even if it is used as feed, it is still grain."

Xu Jingzong nodded slowly, "Chang'an Ling is still as diligent and thrifty as before."

Saying this, Xu Jingzong wondered what would the Wa people think if they knew that the grain sold to them was actually the feed for Jingyang.

Xu Jingzong bowed and said: "If there is nothing else, I will go back to Chang'an and wait for news from Brother Zhu and the others."

Li Zheng nodded slightly.

After staying by the river in Jingyang for a while, Li Zheng thought that Datang's intelligence organization had always existed.

From gossip to scouts.

It has been in operation since ancient times.

Even as early as the Warring States period, there were people who specialized in intelligence warfare.

Whether a piece of information is true or false sooner or later often determines many things.

Li Shimin also has an intelligence organization in his hands.

The intelligence organization in his hands should be bigger.

Li Zheng returned home with his teacup in his arms. The intelligence organization he needed didn't need to be too large. If the intelligence organization was too large, it would be easy to form a free range and form cliques.

It is easy to develop into a fight in the nest.

This can be seen from the Jin Yiwei of later generations.

The intelligence team does not need to be too big, but it must be fine.

It is best to have experienced staff.

The autumn harvest in the village is over.

There are a lot of pumpkins at home.

Looking at the pumpkins piled up like a hill at the entrance of the kitchen, Li Zheng rolled up his sleeves and made pumpkins for dinner at night.

Stir-fried pumpkin, pumpkin soup, pumpkin puree.

After cleaning up today's account book, Li Lizhi looked at a table of pumpkin dishes and said, "It really took a lot of thought out of you."

Li Zheng said: "Pumpkin is actually a very nourishing ingredient."

Before I came to Jingyang when I was a child, I had never eaten pumpkin.

It was only later that I heard from Li Zheng that there was such a food as pumpkin.

Li Zhi and Xiao Sizi also came back from the academy.

Seeing that Li Zhi was about to sit down, Li Zheng said, "Have you washed your hands?"

Li Zhi just sat down and stood up to wash his hands.

Xiao Sizi washed his hands consciously and sensiblely.

Li Lizhi picked up a piece of pumpkin and ate it. The pumpkin was soft and fragrant.

It is a very mild food.

As soon as Li Zhi sat down, he started to gobble it up.

While eating, Li Zhi said: "The hot steam cylinder is not easy to cast, and the iron is always not good for calcination."

While eating slowly, Li Zheng said, "Have you encountered any problems?"

Li Zhi put down the bowl and chopsticks and burped, "The main thing is the tightness. If the temperature of the boiler is too high, the iron lock on it will crack."

Li Lizhi and Xiao Sizi also finished their dinner.

Xu Hui took the maids to clean up the dishes.

According to habit, Li Zheng likes to drink a cup of tea after meals.

Xu Hui made a cup of hot tea and placed it in front of Li Zheng, saying, "The tea that Bingzhou just sent is better than previous years."

Li Zheng took a sip of tea and saw that Li Zhi was looking at him all the time.

After taking another sip of tea, Li Zheng put down his teacup and said, "Why is His Royal Highness King Jin looking at me like this?"

Li Zhi said with piercing eyes, "You must have a solution."

Li Zheng smiled and said, "What can I do?"

Li Zhi said: "Even the blueprint of the boiler was drawn by you instructing me."

Li Zhengchang sighed and said: "The ductility of iron is really not good. You can use copper to fix some key interfaces."

Li Zhi thought about it and said, "Bronze? Casting copper is a felony."

Li Zheng waved his fan and said: "Our family has a lot of silver money, and it's okay to cast some copper. I think your father will like this boiler very much, and he probably won't punish you."

Some looked at Li Zheng suspiciously, and Li Zhi said again: "Really?"

Li Zheng frowned and said, "I guess."

After hesitating for a while, Li Zhi said, "Is it really necessary to use copper? Is the ductility of copper and iron really different?"

Li Zheng said: "You will know if you try it. Tie Da has rich casting experience. In fact, you can also ask him."

Glancing at Li Zheng again, Li Zhi returned to his room in silence.

Go back to your room.

There is some chaos in the room.

Li Zhi looked at the drawing in front of him, it was a huge boiler drawing.

After studying thermodynamics for two months, Li Zhi recalled the research process, and unexpectedly found that most of the ideas were correct as long as Li Zheng corrected them.

This boiler is based on the principle of thermodynamic pressure.

As long as the boiler is heated, a lot of hot gas pressure will be generated in the boiler.

This thermodynamic pressure is enough to be converted into kinetic energy.

This can also solve many power source problems that have been confusing me.

If the power source problem can be solved, Li Zhi feels that many of his conjectures can be verified.

The airtightness of the boiler is very important, and the airtightness is good enough to generate enough pressure.

The Institute has been studying dynamics for a long time.

Many mechanical studies are also approaching the bottleneck.

Li Zhi had a feeling in his heart that as long as this boiler was built, it might break the theoretical bottleneck of the Academy.

And the big boiler in front of him used almost all the dynamics knowledge he had learned so far.

With the application of thermodynamics, the source of kinetic energy is obtained.

Formulas, theories, experiments, and the boiler in front of him, Li Zhi felt inexplicably urgent.

Looking at Heiye outside the window, Li Zhi really wanted to go to the blacksmith's shop to find the iron master to build this boiler.

Li Zheng was sitting in his study and looking at the books in his hands. There were many studies on the construction of medieval ships.

The age of great navigation was also an era of very rapid development of ships and technology.

Today there are only documents from the beginning of the Middle Ages.

It was also the time when ships were equipped with boilers.

When the ship meets the weather when there is no wind, it can only drive the ship by burning the fuel in the boiler.

Only after leaving the windless zone will the ship set sail.

Of course, the earliest voyages did not have boilers. Once they encountered a windless climate or arrived in a windless area, they could only wait.

At that time, experienced and experienced captains were needed to sail, and charts became a vital thing.

Of course, even a seasoned captain with detailed charts and experience will be blinded when he reaches the open sea, and it all depends on luck.

In the early days of the nautical age, when there were no boilers and compasses, the risk of sea navigation was extremely high.

But after the boiler was installed, the nautical industry ushered in a vigorous development, and ocean sailing gradually became the first choice of many adventurers.

(End of this chapter)