In the garden, Zhu Yuan glanced at the expressions of the people around him, except for Zhu Fan and Zhu Li, the others, from the emperor and the crown prince to the various books, it was obvious that they all thought of many things that should be associated in an instant.

About the use of this pump after enlargement.

But that's not all.

Zhu Yuan briefly explained the principle of the steam engine on the first page of the demonstration board, took it off and handed it to the servant on the side, and gently knocked on the second page to attract everyone's attention again: "Ancestors, and everyone, what you imagine must be to use this pump to pump water from the canal and water the fields, this is indeed a way in the future, but in fact, it is not the main thing. ”

Everyone followed Zhu Yuan's voice and looked at the second page of 'ppt'.

Above is a picture.

At a cursory glance, it should be...... A layered view of the ground being cut open, because the top depicts crops and trees, farmers and the like, and there is an obvious well that goes straight down the profile, and the well is secured with a pumping machine similar to the next one, and the water is gushing out from the above ground and irrigating the farmland.

At the bottom of the picture, judging by the light blue wave shape, it is supposed to be a water layer.

Although I rarely thought about going deeper, there was water underground, and everyone here knew about it, so I only felt that it was more clear at a glance.

Zhu Yuan has continued: "The imperial court builds water conservancy, no matter how much it invests, it can't cover all of them after all, not to mention, in the event of a major drought, even if there are ditches, it is in vain if there is no water." Therefore, the biggest use of this pump is actually to pump groundwater. ”

Speaking of the aquifer on the painting, Zhu Yuan continued: "The land under our feet, the mountains are too complicated, I only take the plain area here, the shallow suitable for cultivation, called the 'humus layer', and many nutrients in it can supply crops to grow." Further down is the 'sand layer', and the depth of this layer, usually starting from two or three feet, is not sure how deep it is, and it will be necessary to conduct geological research in the future. The key point I want to talk about is the 'aquifer' that coexists with this layer of sand, and the water in this layer comes from the rivers flowing down from the mountains, from the rain and snow that falls naturally, and this water seeps in through the surface of the earth, gradually accumulating, and maintaining a permanent state. Whether the ground is waterlogged or drought, the aquifer will exist, the difference is only according to the landmark drought and flood, the depth is adjusted, but even if the surface is dry, the amount of water stored in the aquifer is still far more than our needs. ”

Zhu Yuan didn't know the various geological names in the past, and here, many of the terms were made up, so that the people around him could understand them.

Of course you understand.

As a former farmer, Lao Zhu looked at the pumping machine that was still running, and then looked at the 'ppt' demonstrated by Zhu Yuan, and couldn't help but fantasize that in this world, if there are tens of thousands of such pumping machines, the future will ...... Where will there be any drought.

Wouldn't it be better if all kinds of water conservancy projects were repaired well to ensure that there would be no floods during the rainy season...... The wind and rain are always far away.

Ten thousand years!

Thinking of this, Lao Zhu felt that his body trembled slightly, and the inexplicable movement made his fingertips a little numb.

Zhu Yuan paused slightly, seeing that no one asked, he looked very immersed, and waited for a while before revealing the third one.

This is a small picture of the world.

The topographic map drawing method proposed by Zhu Yuan was adopted, and the plain was green, the desert was yellow, and the plateau was gray, which was clear at a glance.

"Everyone, look at this map again, I just said, Hebei, Henan, Shandong, Lianghuai and other places should be the main granary of the Ming Dynasty, the key is that they all have large plains, which is actually the most suitable area for farming. As for the Jiangnan area, it only has the advantages of climate and water source, but if it is said that the land suitable for farming, the proportion is actually very small. Even, as shown in this picture," Zhu Yuan said, drawing a large circle on the map of China in his memory: "In the future, after we take over all the land of the former Yuan, in addition to the mountains and hills, etc., the actual plain area, that is, the area suitable for farming, will only account for less than one-tenth of our Ming territory, if it is further expanded according to my ideas, in the end, I am afraid that it will not even be 5%, but as long as the 5% of the land is managed well, it will be enough to support the whole world." ”

This time, someone finally spoke, it was Fu Xuan, who participated in politics in Zhongshu.

This old minister Chen Youliang from Jiangxi obviously arched his hand to Zhu Yuan excitedly before saying: "Pingzhang, even so, the lower officials think that the Ming Dynasty should not expand to a remote place. Just as Pingzhang just signaled, what good does it do to the extreme west and the north, and only increase the burden of the imperial court? As he spoke, he turned to Lao Zhu: "The minister also asks Your Majesty to think twice, if it is feasible for Pingzhang to show today, the prosperity of the Ming Dynasty can be expected, but Your Majesty must not rely on the servants to attack wantonly and waste national strength." ”

"You said that these are all good words, I can hear it," Lao Zhu also came back to his senses at this time, nodded, but signaled to Zhu Yuan again: "It's just ...... Oh, the truth in it, Yuan'er, it's still up to you. ”

Zhu Yuan thought for a while and said: "The reason is too big, I can't finish it in a few words, I will write a special article in the future, well, let's talk about a ...... first" He pointed to the northeast and made a comparison: "...... Politics, what do you think, what's going on here? ”

Fu Xuan looked at the land that was also light green, and thought about it before saying, "Bitter cold land...... Even if it is captured, it will be difficult to defend it. ”

As he spoke, he remembered that Lao Zhu had talked to them about purchasing cotton and planting it vigorously yesterday.

This......

Have you thought about it?

Zhu Yuan has already said: "Participating in politics is a bad word, this piece is not only a plain, but also a very special geology, compared to our common loess or laterite, here ...... It's black soil! As I have just mentioned, the shallow soil layer suitable for cultivation is called the humus layer, which is formed by mixing various nutrients suitable for crop growth with soil, while in the northeast region, because of the lack of cultivation for thousands of years, nutrients continue to accumulate, making the land black, which shows its fertility. If this place can be taken and reclaimed, the Northeast will become the world's first granary in the world, which is richer than Jiangnan and the Central Plains. ”

When these words came out, not only the courtiers, but even Lao Zhu's eyes widened a little, and he subconsciously took a step forward.

Because......

This thing...... This is such an important matter, my precious twenty-third grandson has never said it before!

This kid ......

How much else do you have in your head?

The short silence was quickly broken again, and it was Li Shanchang who finally couldn't help it, in the end, the lord was in front, and he didn't dare to be too yin and yang, but he couldn't help but ask: "Pingzhang has good experience, even if the lord here doesn't know about the Northeast, is it possible, have you been there?" Otherwise, how do you know about this black soil, and even if it is black soil, how do you know that it is suitable for farming? ”

There are thorns in Zuo Xiang's words, but they are also doubts that everyone has accumulated for a long time.

How can this little boy with a mysterious background know astronomy and geography on the ground, so he looked at Zhu Yuan again, expecting an answer.

Zhu Yuan smiled: "Zuo Xiang, my experience, all kinds of things, can only be said to the ancestor alone, I am afraid that everyone present will not be able to listen to it." I believe that my ancestors will believe what I say. ”

Everyone immediately looked at Lao Zhu.

Including Zhu Biao.

Zhu Yuan's words, the other courtiers did not dare to say anything, however, Zhu Biao felt ...... That "Book from Heaven", that ...... In the future, you should always be able to see, right?

Lao Zhu saw everyone looking at him, but just waved his hand: "Don't talk about these topics, Yuan'er, you take it." ”

Zhu Yuan agreed, did not take off another one, and continued to gesture to the small map in front of him: "Let's briefly talk about it, with this pumping machine, coupled with the construction of water conservancy, for the Central Plains, we can achieve drought and flood harvest." But at the same time, more than ninety percent of the other land of the Ming Dynasty has its own needs, such as minerals, such as forests, such as water sources. Even, in the future, the sea will also be assigned to our Ming territory, which has been seen by everyone this year, should not need me to say more? ”

Everyone nodded.

Zhu Yuan habitually patted his hand lightly: "What the pumping machine demonstrates is the 'production' in the 'economics', and below, let's look at the 'distribution' that it can involve, 'production' and 'distribution', which are the two fundamentals of 'economics'. ”

As he spoke, he gestured to the long track on the other side: "The same principle of the steam engine, this one, called the train, is mainly used as a transportation courage." ”

As Zhu Yuan signaled, the craftsmen standing at various points in the half circle around the small lake unveiled the red silk covering the tracks, and a total of six model steam trains appeared in everyone's field of vision.

Only then did everyone take a closer look.

At first glance, it looks like a long track, which should be made of pure copper, with a wooden strip underneath, and a width of only one inch.

Look at the steam train models, which are slightly wider than the tracks, and the six trains, all of which have carriages of different lengths, or only one foot, two or three cars in total, or ...... The longest one, dragging thirty or forty carriages, was one foot long, like a thin snake.

Looking at it here, under the operation of the craftsman, the six trains quickly moved, not fast, but not slow, enough to give people a sense of moving forward.

Zhu Yuan led everyone to another demo board close to the track, unveiled the red silk, but did not rush to speak, but said loudly: "Imagine everyone, this track ...... What will happen if it is spread on the entire land of the Ming Dynasty? ”

When these words fell, the most high-profile one-foot long train happened to pass in front of everyone.

After a closer look, everyone realized that this train ...... It was equipped with three steam locomotives that were all burning and smoking.

The others just looked at it, and while considering Zhu Yuan's words, Zhu Rong, who was already eager to try behind Lao Zhu, finally didn't hold back this time, ran forward, and reached out directly.

"Stop!"

Lao Zhu's voice was majestic, stopping the movements of the second son, and he still felt ...... It's a bit of a shame.

Bastard boy.

Your 20-somethings are watching here!

Zhu Fan didn't really mean to pick it up, but he just wanted to touch this magical little thing, and when he heard his father's words, he could only stop, but turned his head: "Dad, I want to ......"

After speaking, he felt that it was obviously unreliable to mention this to his father, and a pair of eyes turned to Zhu Yuan very smartly.

Don't speak, don't speak.

Lao Zhu felt even more embarrassed, he didn't want to step forward, and signaled to his eldest son.

Zhu Biao stepped forward quickly with a small face, pulled up his younger brother, and said, "Second brother, don't be rude." ”

Zhu Yuan can understand the strong attraction of toy trains to little boys, but at the moment, he can only pretend to be invisible.

also glanced at Zhu Li, who was obviously eager but still obediently standing beside Lao Zhu...... At the beginning, if he said that he was from the third family, would it be better?

Well.

Forget about the fourth, you will be beaten.