Zhao Kuangyi came to the Song family, and there were many people.

At least more than 70 Yanei, and more than 20 little ladies, yesterday's seven pictures almost caused a sensation in the entire capital, isn't that curious? There are also servants Yahuan, including Yuping, Song Jiu's eldest sister, and more than 100 people scattered in the front or back yard of the Song family. In the middle, there is Pan Li'er, Yuping is in the backyard, and Pan Li'er is in the front yard, looking curiously at the Song family and the students in the classroom with big eyes.

Song Jiu was teaching and did not come out.

So these people gathered in twos and threes and talked about it.

Zhao Kuangyi came, Song Jiu couldn't slack off, announced the end of class, and met Zhao Kuangyi. Zhao Kuangyi got straight to the point and asked, "Song Jiu, this official asks you, why can people go to heaven?" ”

Zhao Kuangyi was so depressed that he couldn't ask this question at all, how can a person go to heaven?

Song Jiu said: "Don't worry. ”

greeted these Yanai one by one, came to Pan Li'er and said, "I've seen Little Lady Pan." ”

A group of little ladies laughed.

Pan Li'er blushed, pointed at Song Jiu and said, "You are a bad person, you will deceive people." ”

"Little lady Pan, I'm not a bad person, I don't believe you ask the people in the river. It won't lie to people, when I said to His Royal Highness the Second King, I could let me increase the production of iron ore, you ask the Second King, have I achieved it? ”

"Get down to business!" Zhao Kuangyi shouted, thinking in his heart, Pan Mei's three sons can't do it, how can they bring Pan Li'er over? Isn't this sending fish into the cat's mouth?

"Second king, and you, come in with me," Song Jiu led them to a classroom, which was packed, and called out to another student, whispering a few words, and the student ran to the back room to bring a few things. Song Jiu first put a box on the table, poured water into it, took out another stone, and said, "What will happen if I put the stone in?" ”

A group of Yanai want to put up the middle finger together, do you still need to ask about this result?

"Everyone knows that the Tao will sink, then I won't try it," Song Jiu poured out the water, took out a porcelain bottle, and poured a white liquid into it, some people know, it is mercury, this thing appeared in China very early, but the effect is very bad, either used to harm people, or Taoist monks use it to refine small balls for people to eat. In the Ming Dynasty, many emperors were killed by it, and it is rumored that Li Shimin was also killed by eating the Xitian monk Xiaowanzi. In fact, it has a wide range of uses, if Song Jiu is interested in Lei Gong, he must have mercury, and he also needs it now, that is, a thermometer. At the same time, it can also be used as a variety of catalysts, and it is inseparable from it when the class is taught in depth next year, and it is inseparable from the test in the classroom.

I prepared a little, not too much, and just put more than half of this box.

Song Jiu put the stone in it again, and with a sigh, the stone was actually floating on it. Song Jiu said: "Everyone take turns to watch, but don't touch it, it's mercury, it's poisonous, I'll go get something over." ”

He brought another iron spoon and put it in, still floating, and as he threw a few more copper coins into it, it was still floating. Scoop up the stones, copper coins, and iron spoons, and tell a student to wash them, then pour the mercury back into the bottle, and say, "Why do they sink in the water, but they don't sink in the mercury?" ”

Can that be answered?

"The reason is simple, all kinds of flowing substances have buoyancy, and the buoyancy is different, the heavier the buoyancy, the greater the buoyancy, and the lighter the buoyancy, the less. Therefore, stones and copper coins sink to the bottom of the water, but float on mercury. This is also the reason why the boat is loaded on the water. Not only liquids such as water and mercury, but also gases are also buoyant, but they are so light that they cannot be seen. If properly designed, it can carry objects in the air. For example, Kong Ming lanterns. But if the design is smarter, the weight is not a lamp, but a heavier thing, including people. Therefore man can go to heaven. ”

"Really?" Fu Zhaoshou asked.

"It won't be fake, when I sort out the iron and steel problem, I will do such a test, and let you go to the sky to take a look at it when the time comes."

"I'm going," Pan Wei shouted as he huddled through the crowd.

"Yes, in the winter, it will be even better." Song Jiu touched Pan Weizheng's little head, that was the future third brother-in-law. In fact, after a long time, as Pan Weigu said, Yuping wrapped her fingers around her softly, and Song Jiu was also used to Yuping coming to visit from time to time, and he was very busy, so he gradually forgot about Pan Li'er. But as soon as Pan Li'er came, Song Jiu was once again hooked with three points of soul.

"Can a man really go to heaven?" Zhao Kuangyi muttered.

"The second king, not only can people go to the sky, but they can also fly like birds, but that technique is too complicated, and Wei Chen probably can't do it. It can only be carried to the sky to take a look. ”

"Why can you jump down from the sky?"

"If you can go up to the sky, you can jump down."

"You jump from the roof of your house and look at it."

"Second King," Song Jiu swallowed, can this jump? After a while, he said: "That's different, this jump down requires some design, and it needs to be high, the higher the safer, the lower the danger, at least seventy or eighty zhang away from the ground to jump down, otherwise there is danger." ”

"Nonsense."

"Look," Song Jiu wrote the formula of the momentum theorem with chalk, only half of it was written, and this formula and calculus were written, and at this time, all the people on the earth would be concentrated, and no one would be able to understand it.

"Can you really go up to the sky, can you really jump down?"

"Second King, what is the location of the Royal Street? How dare Weichen joke? ”

"Joking, Song Jiu, do you know how many Yanchen are impeaching the imperial brother?"

"Second king, please tell Your Majesty to let him enjoy in the palace, think about it, the ministers use it to provide entertainment for the people, and put it in the court? When attacking the city level, they do not know the enemy's situation, and they often suffer heavy casualties. But in front of the two armies, a thing was raised, rising to a height of dozens of feet, is the situation in the enemy's city clear at a glance? The development of this river island will involve countless techniques, involving all aspects of military and civilian use, and the benefits of micro-ministers will only be a little small profit, and the imperial court is the real biggest beneficiary. ”

"Stop, stop, let me ask you, what about the rest of the paintings?" Zhao Kuangyi said. There are only eight paintings, which is already earth-shattering, and there are twenty paintings in total!

"The two kings, the only thing that is fun is this playground, and the rest of the commercial or civil, the two kings will know the way when they are posted."

"You use this to make money?"

"It costs money to build it, and it has to be waited on by a special person, at least four or five people, just in case. There is a little cost to be charged. ”

"How much does it cost?"

"Now where do you know Lu Dao," Song Jiu hit a Ha Lu Ha.

Zhao Kuangyi understood that going to heaven has been a dream since ancient times, and it can fly down from such a high place in the sky, and a loaf of bread dares to sell for a consistent price, and this fee will be an astonishing number.

I don't care about this Zhao Kuangyi, as long as I don't steal or rob, even if I "fly" to collect a thousand yuan at a time, it is Song Jiu's matter with the guests, and it has nothing to do with the imperial court, what he cares about is something else: "Song Jiu, are there other techniques?" ”

"Yes, once it is studied, as long as it is necessary for the imperial court, the minister will take the initiative to hand it over to the imperial court. By the way, the second king, you are here, Weichen just said two things. The first thing is to send people to Xuzhou, Shouzhou, and Haozhou to find out if there is any coal, and where there should be, but it is buried deeper. In the future, a large amount of coal will be used in iron smelting and steelmaking, and there is no water transportation in the north, and the cost of transportation to the capital will be very high. ”

There is a premise for this, that is, the use of gunpowder can be mined at depth.

In later generations, there were large coal mines in Huainan and Huaibei and Xuzhou, but not now. When he started using coal, he was very backward, including Song Jiu's continued to use charcoal for heating last winter instead of using a coal stove. This is a backward way of heating, one is that charcoal is expensive, and the other is that charcoal is more likely to be poisoned. Of course, it is not possible to find coal, anthracite must be found to really replace charcoal. This significance is not trivial, just the charcoal that the people roast and burn in a year now, I don't know how many forests have been destroyed.

Moreover, the technology is backward, and most of the coal that can be found is those coal mines that are almost open-pit.

Song Jiu asked the students to teach the officials to use gunpowder, which could not solve the problems of gas, but could be replaced by some methods, such as the mine hole is diagonally downward, without a long bamboo tube, but with some flammable long wire, wrapped in a small ball and thrown down, the long wire will be ignited, then it is a gas explosion, far away from the craftsmen, there will be no danger to life. The use of gunpowder will be very efficient, but it is easier to cause landslides, which can be avoided by two or three air explosions, the first time to blow up the ore, the second time to transport out part of the ore, and then ignite the gunpowder, using the sound and momentum of gunpowder to blow up the unsolid ore body in advance, so as to avoid the miners from collapsing when mining below.

We can't ignore the wisdom of the common people, and once the principles and various reasons are disseminated, there will be more smart people who will come up with various ways to improve efficiency and strengthen security.

However, before the promotion, the current coal of the Song Dynasty mostly appeared in a small number of places in Hebei, Shandong, Hedong and Shaanxi, although it was easy to mine, because it was mostly in the mountainous area, it was not easy to transport out. If we want to achieve large-scale advanced iron smelting and steelmaking, we must find a large coal mine from Xuzhou and Lianghuai, and then use the convenience of Bianshui to transport it to various places.

He also said: "The two kings, find a saline-alkali land on the shore of Bianshui in Chenliu County and build a place for smelting coke, blast furnace and steel. ”

"Coke?"

"The charcoal is further cokered to raise the temperature at which it burns."

"How much silk will it cost?"

"I will use some money, but at first it will be just a withdrawal, and there will not be a lot of money. Once the technique is fully mature, the imperial court can promote it. At that time, the imperial court would get a lot of high-quality steel every year. Even its skills can be used to burn good porcelain, build more sturdy, practical and fire-resistant houses, reduce the cost of bricks and tiles, so that the people in most areas of the country can heat in winter. ”

"If you can really do this for the imperial court, the official can be the master, and the imperial court will bear the principal of repairing the bridge, the warehouse dock and the academy."

"That's great," Song Jiu said excitedly.

Among them, the bridge cost is the least, but the bridge is the most important, only when the bridge is built, can be realized one by one.

And the most money is not used by the people, from the later generations, how the real estate is set by the white wolf I don't understand, that's a wasted life. Therefore, the most money is not used in the main store, but in the dwellings, but the wharf, which covers too much area, and the imperial court will bear it, which will relieve Song Jiu by half.

Zhao Kuangyi still wanted to say something, but when he saw Song Jiu's smile on his face, he didn't say anything, stood up, and left with Liu Ling and the servants, and on the way Zhao Kuangyi asked suspiciously: "Judge Liu, can you go to heaven as a real person?" ”

Liu Ling replied: "Fu Yin, compared to whether a person can go to heaven, his subordinates think that where Song Jiu got the principal is the most important ......."

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