Thinking about taking a day off, Qian Tang rushed in the morning, but in the afternoon, it still didn't work.

First of all, Jinling University sent someone to pick up the book, planning to take it back and copy it.

Zhu Yuan personally ordered that whether it was the earlier "Song Hui Yao", or the "Taiping Yulan" that only arrived a year ago, or various other things, they were all pulled away.

Moreover, good things are done.

There are not as many books on his side as there are in the palace, not to mention, there are also a large number of Yuan Dynasty classics and archives brought back from Dadu last year, which Zhu Yuan has long considered.

Anyway, it's all the same word.

Copy.

Speaking of this, many people may subconsciously think that printing appeared so early, and movable type printing has long existed, so why do you still want to copy books?

Because that's the reality.

In this era, printed books are a minority after all.

After a few carts of books were hauled away, news came from the cement workshop that the first batch of prefabricated slabs that had been poured a few years ago were now basically dry and ready for some testing.

Obviously, in order to accommodate Zhu Yuan, Shen Quan personally took a batch of prefabricated slabs to Houhu Medical University on the north shore of Xuanwu Lake. After all, if you want to use it, the laboratory of Houhu Medical University, as well as the planned penicillin workshop, must be the first batch.

Zhu Yuan also wanted to see it for the first time, so he left the lake from the back door of the mansion and rushed to the Medical University by boat.

In a vacant lot to the north of the laboratory compound, where a new laboratory is planned, a total of ten prefabricated panels of varying lengths and widths have been brought in.

However, after Zhu Yuan arrived, the first thing he noticed was the board car that pulled the prefabricated slabs to this side.

A pallet car with new bearings.

You know, even with holes, the prefabricated board is very heavy, there is data here with a little question, the average is around 500 catties, and the heaviest sample is even more than 1,000 catties.

With such a weight, it will be very laborious for ordinary cars to drag at this stage, and even if it can be pulled, the key is that the wear and tear on the vehicle will be great. In contrast, a pallet car with ball bearings is not only easier to drag, but also minimizes wear.

Of course, Zhu Yuan extended because of this, but what he thought of more was something else.

Artillery!

In the history of mankind, artillery appeared much earlier than most people think. One of the biggest limitations of artillery, however, was transportation.

Iron cannons of thousands of pounds at every turn.

It's too heavy.

So, even if one or two can be transported, one or twenty, or one or two hundred, that's going to be a problem. In the era of lack of accuracy, artillery could not be used intensively on a large scale, and it was of little significance.

One of the keys to solving the transport of heavy artillery, as simple as it would have been, was ball bearings.

The world is so simple and wonderful.

When Zhu Yuan was thinking about this, Dai Sanchun and Shen Quan came to him together, and after giving a salute, Dai Sanchun said, "My lord, do you want to test it now?" ”

"Of course, it's all here," Zhu Yuan said, and looked at Shen Quan with a smile: "Don't let me down." ”

Shen Quan obviously didn't have much confidence, and just said, "Xiaguan...... Exert oneself. ”

The method of testing is still simple and crude.

Standing people.

Zhu Yuan ordered about the smallest piece, one zhang long, one foot wide, and three inches thick.

The two sides were padded and hung half a foot in the air, and he began to command the men to stand up.

In the blink of an eye, it was full.

I also squeezed as much as I could, hugged together, and finally squeezed twelve big men.

It is estimated that the total amount of 1,500 catties, as a result, the narrowest and thinnest prefabricated slab, will not move.

It's still not right to think about it.

The total amount is still too small, after all, the density of people is close to water, too low.

Simply prefabricated slabs stacked prefabricated panels.

Or the smallest piece is at the bottom, and the others are lifted and pressed up.

When five prefabricated boards of different sizes were pressed horizontally, the total amount was judged to be more than 3,000 catties, and the center of gravity of the five prefabricated boards was biased to the middle, and the bottom one finally broke and collapsed.

No breaking.

Because, in it, there is a reinforcement added, so it is only broken.

Let the rest of the prefabricated panels be carried away, and everyone will look forward together...... See...... See......

And then.

Well.

Is this good or bad?

Dai Sanchun and Shen Quan looked at Zhu Yuan together.

Zhu Yuan pondered and said, "It should be good." ”

As he spoke, he took the clipboard from the official in charge of recording on one side, which also appeared in Mingzhou and gradually spread.

Zhu Yuan turned a page of paper and wrote and drew to the two people standing on his left and right: "Formal construction, the prefabricated panels should be arranged horizontally, if it is multi-layered, the force is mainly at both ends and in the middle...... Well, I think what should be calculated is the force limit per unit area. What we just demonstrated is basically the most vulnerable part in the middle of a prefabricated slab. This is not the case...... Anyway, even if the building is built into two or three percent, and the load of a single block exceeds 3,000 catties, I think there is no problem. Just like just now, so many people are crowded on a board, no problem, not to mention that they will definitely be stressed together in the future. ”

After Zhu Yuan finished speaking, Dai Sanchun nodded slightly, and Shen Quan couldn't help but add: "Also, my lord, even if it ...... Even if it is broken, there is a steel bar connected to it, and there will be no major problems for a while. ”

As he spoke, he gestured to the prefabricated slab that was broken not far away.

Zhu Yuan also agreed.

Still, I'm going to test it a few more times.

So I changed to another prefabricated board, and the load-bearing test was carried out again, and there were more patterns.

As a result, five of the ten prefabricated panels were broken, but the rest were ...... compared to the original one Affordability is better.

Finally, the decision was quickly decided.

Open dry.

Dai Sanchun couldn't wait for this, he wanted both a new lab and a better penicillin workshop, both of which required prefabricated panels and cement.

However, on the contrary, Zhu Yuan was more conservative.

Tell here, you can build a simple two-story building first, the traditional kind, upstairs and downstairs are three rooms, try the effect. After all, it was only a separate test of prefabricated panels, and no one had ever seen what it would be like to build a house.

Even if you think it should be better, after all, seeing is believing.

There are also considerations for choosing a small house instead of a bungalow. If it's okay to build a small building, it's even better to build a bungalow.

Dai Sanchun and Shen Quan also agreed.

It's simple.

Moreover, he also promised Zhu Yuan that it would be completed within ten years.

At first glance, Zhu Yuan felt that it was a little long.

I remember that once, a building a few hundred meters high could be completed in less than a month, you ......

On second thought, it takes more than half of the time just to make the prefabricated slabs, after all, it takes several days to pour the prefabricated slabs just waiting for them to dry naturally.

This year, it was roughly discussed again, and the matter was finalized, and Zhu Yuan was not able to leave. He was dragged by Dai Sanchun to the front laboratory courtyard and discussed some penicillin-related experiences that he had recently discovered.

Moreover, what Dai Sanchun is looking forward to the most is that Lao Zhu issued an edict the day before yesterday, when he was still the fourth day of the new year, asking all provinces, states and counties in the Ming Dynasty to donate penicillium strains to Jinling for screening.

Back home, it's another evening of the day.

Don't even think about resting tomorrow.

Lao Zhu has already sent a message that tomorrow morning, a meeting will be held to discuss the matter of Jinling Military University.

Soldiers, the country's major affairs.

Zhu Yuan threw out the plan of Jinling Military University, and he had talked to Deng Yu before, but it was far from enough. Since Chang Yuchun has returned, and the military department has been established, and Lao Zhu himself can't let go too much, then tomorrow, discuss it carefully.

It's a new day in the blink of an eye.

The seventh day of the first month.

I felt very good in the early morning, because one left and one right were cherries and plantains, and the two women did not have as many eyes as Zhuang Liuniang, but it made Zhu Yuan very relaxed.

I didn't eat much breakfast, arrived at the imperial city, and came to the east pavilion on the left side of Fengtianmen, and there was still some time before the appointment.

Zhu Yuan came to Lao Zhu's study first and talked about yesterday's prefabricated panels.

Lao Zhu also said that he knew.

In the early dynasty, Shan Anren said that he would build a two-story building in the cement workshop in the next ten days to see the effect.

Zhu Yuan remembered that he was thinking about building a medical university yesterday.

But......

Well.

Although I quickly understood the thoughts of some people, this is a small section, and it doesn't matter.

Lao Zhu then talked about another: "Wen Zao, do you remember?" ”

"I helped deliver the letter for so long, how could I not remember," Zhu Yuan smiled, and then reacted: "Ancestor, Wenzao is back?" ”

When Zhu Yuan was in Mingzhou, in order to ensure the confidentiality of the message between him and his baby twenty-third grandson, Lao Zhu specially instructed a Gongwei Si Baihu Wenzao to be responsible for serving as a messenger.

Zhu Yuan returned to Jinling, Wen Zao was also promoted, and, if he remembered correctly, he was sent to the Northeast.

"I came back from Goryeo, landed in Mingzhou, was injured, and is still recuperating, I told him to come back later." Saying this, Lao Zhu also took a sandalwood box from the side and handed it over: "Look at it." ”

Zhu Yuan opened the sandalwood box.

Inside is a mass of things wrapped in white silk.

Zhu Yuan unfolded, only to see that there were some ...... Black earth.

Black earth?!

Immediately reacted.

This is the black soil in the Northeast, and I told Lao Zhu before that it takes hundreds of years to grow an inch of fertile land.

Unexpectedly, Lao Zhu was so attentive that he even ......

Zhu Yuan couldn't hold back, and curled the corners of his mouth: "Ancestor, this sandalwood box contains a bag of black soil, it's too wasteful, right?" ”

Lao Zhu, who was flipping through a notebook, glanced at someone who was not walking on the other side, did not answer this question, handed over another letter, and said: "Wen Zao and his party went all the way north, first found this black soil, and then continued to travel north, after crossing the boundary of the North Mountain, I felt that the days were getting shorter and shorter, and the weather was too cold, so I had to retreat." On the way back, I saw Naha, was entertained, and left to return to Guannai, but was chased and killed, and had to turn to Goryeo, and found our merchant ship of the Ming Dynasty, so I had to return to Mingzhou. ”

Lao Zhu said, and Zhu Yuan quickly finished reading Wen Zao's secret letter.

It's basically an introduction to what I've seen and heard along the way.

Putting down the letter, Zhu Yuan thought for a while and said, "It shouldn't be the person sent by Naha, otherwise, the other party can kill them on the spot." ”

"Yes," Lao Zhu said: "The Yuan room is destroyed, and the northeast side ...... Naha will have no orthodoxy, and not all the tribes outside the border want to belong to our Ming Dynasty. ”

Zhu Yuan asked: "The ancestor captured Nahachu back then, what is his opinion of him?" ”

Lao Zhu recalled for a moment and said, "It's just that he has a good background." ”

Zhu Yuan said: "If this is the case, the Northeast ...... It can be messy. ”

Lacking ability and without the support of the orthodox name of the Yuan Dynasty, on the side of the northern tribes whose strength is respected, Naha's situation can be imagined.

"The whip is beyond his reach," Lao Zhu nodded, and also sighed: "We have spare strength now, and we must also identify the north, as for the northeast, ......"

He shook his head again.

"Does the ancestor think that it is possible to persuade Naha to return to obedience?"

"It's just that Naha is out and obedient, what's the point," Lao Zhu gestured to the letter that Zhu Yuan had just read: "You have seen it, a commander who can't even protect his own guests, if he doesn't surrender, or there are more people to obey him, if you want to surrender to our Daming, I'm afraid that you will be cut down in the blink of an eye." ”

Zhu Yuan thought about it a little and had to admit that there was a high probability that this would be the case.

It is also a simple truth: after the ancestors have passed widely, it is not easy to surrender to others.

For the Mongols, this is even more so, after all, the Yuan Dynasty has only been around for less than a year, and many people will instinctively hold all kinds of fantasies about a comeback.

(End of chapter)