When the prince saw the sewage and drainage system here, he was very envious: how good it would be if these were used in the palace.

Seeing the envy of the prince and Zhuzhu, Zong Shu said: "The renovation of the palace is too difficult, the sewage pipe has been laid, what should I do outside?" ”

This is a work that affects the whole body, a transformation, the whole city moves.

This project does not have hundreds of thousands of taels of silver, and it can't be done at all, Zong Shu doesn't want to take his own money and let the palace enjoy it.

Walking to the mountain gate of Huanghua Temple, the prince and Zhuzhu found a familiar feeling.

It was here that Zong Shu began his magical journey.

It was here that the good quality of the charcoal was found, and the crown prince gradually consolidated his position.

The reason why the prince believed that Zong Shu could find Shi Tan and come to Mi County with him was mainly because of Zhuzhu's persuasion.

Walk a little further east and you will reach the entrance of the Carboniferous Cave.

Zong Shu asked the prince and Zhuzhu to go back to Huanghua Temple to rest, and he wanted to go to the stone coal cave to see it himself.

Who knew that Zhuzhu had to accompany Zong Shu to go in.

"Zhuzhu, you must know that digging charcoal is very dangerous, and there is a possibility of collapse at any time. There are also gas explosions and the like. You must not put yourself at risk. ”

Before Zong Shu finished speaking, Zhuzhu insisted on accompanying him, and paraphrased Huang Rong's sentence to Guo Jing in "The Legend of the Condor Heroes":

Sheng, I accompany you; Die, I'm with you.

Zhuzhu was not afraid, and of course the prince could not admit it, so everyone went into the mine together.

Cao Dacheng, the elder brother of Cao Zongshen, served as the manager of the coal mine, responsible for production, technology and safety.

As soon as I entered the hole, I found that the inside was curved and curved, except for a few places that would dig down, the others were basically in a plane.

It's not like mining, it's like digging a city in a mountain.

It's just that although the road in this mountain city is flat, the direction is winding and winding, and if it is not led by people, you will not be able to find the way you came.

After a while, everyone unconsciously turned to the top, because there are ventilation holes and lookout holes, and they can see the situation outside.

The place where everyone is is is more than ten zhang higher than the import just now.

It's like making a rotating road in the middle of the mountain.

The winding mountain road is easy to repair, as long as there is enough manpower.

The winding mountain road inside the mountain is the first time everyone has seen it, and it is too difficult.

From the beginning of Li Shaoyan's entry into the mine, he felt as if he had come to the Caojiazhuang tunnel in Renqiu.

There are also seating areas, and there are some spaces that he can see for future uses.

Dig tunnels here? Isn't the outer wall enough to stop the golden people?

The carboniferous resources here are very abundant, and due to the limited tools, its production cannot be compared with that of later generations.

Therefore, digging coal here, Zong Shu asked everyone to do three things: the first is the bottom line of safety, the second is military use, and the third is economic benefits.

The further down the coal is dug, the more effort and the higher the cost.

Therefore, Zong Shu asked Cao Dacheng to build the tunnels of Mixian Shitan according to the style and function of the Caojiazhuang tunnel, and some tactical needs of later generations.

According to Zong Shu's requirements, dig tunnels in the carboniferous mine, extend as far as possible, and it is best to connect with Chaohua Village.

As for the reserves of coal in Mi County, according to the excavation method of building tunnels, it will not be exhausted for hundreds of years.

In this way, it can not only ensure sufficient carbon output, but also meet the military function of the base.

In fact, the cave is not very dangerous, and the top is supported by giant trees. Even the timid beads looked as usual.

Zong Shu was still worried about whether there would be gas, but now he doesn't think it will be at all.

The tunnels that have been completed are basically branched out and extend in all directions, and even if there is gas, it will not gather.

Cao Dacheng came out from the other side with everyone, and this was already another mountain.

About a mile to the right, another mine appeared, and Lin Lingsu said: "Grandmaster, that's a graphite mine, and the graphite mine is indeed associated with the carboniferous mine. ”

Zong Shu hurriedly ran over, picked up the graphite ore pushed out by the miners, looked at the color, and pinched it with his hand.

According to the fixed carbon content, graphite can be divided into four categories: high-purity graphite, high-carbon graphite, medium-carbon graphite and low-carbon graphite.

Zong Shu can judge that the graphite here belongs to high-purity graphite and high-carbon graphite.

Lin Lingsu told him another good news, Mi County is rich in wood, so a pencil workshop was set up here.

Under the research of the hundred students of the Great Song Academy of Sciences, the pencil has been produced.

Lin Lingsu never told Zong Shu, firstly because Zong Shu was too busy, and secondly, he also wanted Zong Shu to come to Mi County to inspect in order to surprise the master.

When you enter the pencil workshop, you will see neatly stacked pencils, which are not much different from the pencils made by machines in later generations.

Zong Shu tested it with lead, and the words he wrote were really black!

In later generations, the pencil refills were made of medium-carbon graphite and low-carbon graphite.

Even if it is graphite with a low carbon content, the pencil made is a 2B pencil, which is the pencil used to draw the question sheets for official exams.

HB pencils, on the other hand, are half graphite and half doped with other substances.

Graphite is a strategic material, and high-purity graphite can be used as a flexible sealing material, instead of platinum crucible for chemical reagent melting and lubricant base.

High-carbon graphite is mainly used in refractory materials, lubricant base materials, brush raw materials, electric carbon products, and battery raw materials.

And the pencil that Zong Shu is holding now is so valuable.

With graphite, there are new sealing materials, there are refractory materials, and sealing and refractory materials are necessary for the construction of high-temperature furnaces.

The prince looked at the pencil and asked, "How is this pencil lead made of stone and graphite?" ”

Lin Lingsu said that this is the method that the hundreds of workers came up with, bought pulping equipment from the paper mill, and beat the wood into pulp.

First, use a refill mold to make graphite into a refill of consistent thickness.

Then put the refill into the pencil mold, then pour in the wood pulp, press, shape, dry, and you're done.

Zong Shu saw that there were talents among the hundreds of workers! The creativity of the masses is limitless.

With these people, in the future, Zong Shu only needs to point to a general direction, and the details of the problem will play their role.

Maybe there's a windfall.

Zong Shu was excited and told Lin Lingsu that the personnel who made the pencils must be rewarded heavily, at least ten taels of silver per person, and it is up to Lin Lingsu to decide whether there is a cap or not.

"In the future, the Great Song Academy of Sciences will usually use pencil to write in class and homework." Zong Shu said.

Everyone is used to using a brush, so will it cause resistance if you change to a pencil?

Lin Lingsu raised his concerns.

"If you want to use calligraphy, I have no objection, you can practice how you want at home, and you can use whatever pen you want. Anyone who uses a calligraphy pen in the Academy of Sciences will be expelled. ”

"I talk about "Romance of the Three Kingdoms" and "The Legend of the Condor Heroes", you use Mao notes, can you do it? In the future, the college will teach mathematics, optics, and acoustics, with a fast pace and a lot of information. ”

"The Great Song Academy of Sciences teaches technology, not art! I studied science, not Confucianism! ”

"The people we cultivate can't be as soft as a brush, but as hard as a pencil!"

Zong Shu reiterated: "Da Song, if you want to embark on the road of take-off, don't be nostalgic for the brush with hair!" ”