Lu Shi is very busy right now. Huluyu is its own base, there are too many things to build, and things are complicated, so you have to personally guide you wherever you are. Although it is not as rumored by the people to go without sleep for a few days, it is common to arrive at only one or two hours a day. Counting on the stars? That's still forget it, it's easy for you to find him, the place in the valley where the smoke and dust are raised, there is his loud voice, but if you discuss the construction of the base area with him, the custody is a sentence; "Everything is decided by Mr.'s word", and then he ran away like a ghost.

Several commendations to various villages and troops have been dragged to pull him up, such a thing, you can't say anything if you don't come forward, but after seeing Tianxing's face, there are absolutely four words of reluctance.

Fortunately, there is a hard-working Mencius and Wu Tao, and an energetic Chen Ce, who shares a lot of the burden of Lu Shi.

Under the stimulation of military songs and ideological education, the soldiers consciously and voluntarily trained hard, and the military discipline was also surprisingly good, and Lu Shi proposed to take out one day every five days to do voluntary labor for the people, and it was to boil up the soldiers' muscles and bones while also relaxing the soldiers' tense spirit, and the biggest gain was to get the recognition of the people, the support and love of the people, which is more important than anything else.

In addition to Wu Tao's busy military affairs, he also took on the role of assisting Mengzi and the third uncle to measure the land and demarcate the boundaries for everyone, and led a group of scholars to record the population information and land information of each family.

When Lu Shi was busy with the design of factories, mines and roads, as well as dams, he always brought a group of children with him, so that he could teach some physics and drawing while doing it, and the children could improve faster in practice than in the classroom. Among these hundreds of children, a few have already made their mark in physics, that is, chemistry, which makes Lu Shi very happy.

The suspension of the dam was the first to be proposed by the third uncle, and now there is a drought and little rain, and seeing that several rivers flow out of Huluyu in vain after coming together, he is very distressed, so he proposed that while it is now the dry season, can a dam be built in a suitable place to store water, and wait for the spring to irrigate the fields.

Lu Shi praised the third uncle's proposal. Agriculture is based on water conservancy, and having a dam is a guarantee of a good harvest, so I took a few proud disciples to climb mountains and wade through mountains to find a suitable site for building a dam. But the construction of the dam requires large stones, and it costs a lot of manpower and material resources to beat it with a steel drill, and the third uncle began to retreat a little after estimating the total amount, but Lu Shi smiled confidently; "Third uncle, don't worry, I have my own way, to ensure that the stones are hit quickly and often, besides, our site selection is on a small river branch, the reservoir built will not be very large, the materials used will not be too much, the construction period will not be too long, it just so happens that I will build some windmills on this dam in order to lift the water to a high place."

The matter of windmills, the third uncle has long heard the old man of the original garrison mountain say, everyone regards it as the magic of the king, now think about it, once large and small windmills and cars are erected in these mountain valleys, what kind of scene will it be? What kind of drought and flood harvest will it be?

It's even simpler to take stones from this mountain, that is, to use explosives.

But let me explain first, the gunpowder used in the Black Tiger Army now is not explosive because of the poor ratio of gunpowder at that time, and the purity of the raw materials is not enough. As a latecomer, the ratio of explosives and high-purity black powder is well understood, and the purification of the ratio is one thing, and the most important thing is the granulation of gunpowder, which is the biggest step to enhance the power of gunpowder. Why didn't Lü Shi purify and granulate the existing gunpowder? That's because this gunpowder is more suitable for the use of the firearms ------ elm spray that the Black Tiger Army is equipped with now.

The elm spray was not as strong as the bronze cannon and later the cast iron cannon, and if the improved and purified black powder was used, then I can guarantee that if the fuse was lit and the chamber was exploded, it would not be a killing but a suicide.

Fortunately, when Chen San came to and from Fu County to purchase, Lu Shi deliberately took out a large amount of silver money to buy sulfur saltpeter and other things, charcoal can be obtained at any time, so Lu Shi took his disciples and students, and found a few masters who could fry gunpowder in the craftsman household to make black explosives together.

The master expressed great doubts about the production of gunpowder by King Chuang, but Lu Shi didn't say much, just began to take him and a dozen of his students to make it, and kept answering the questions of the students and Master Zhang, which can be regarded as a chemical experiment class.

The procedure of making gunpowder is not complicated, but the preparation and purification of the premise is indeed quite complicated, and requires extra care, not to make half a mistake, Lu Shi while teaching, but also waiting for the students' questions at any time, and using their limited chemical knowledge to explain to the children, the children are of course greatly benefited, that is, those craftsmen and Master Zhang also continue to sigh their loneliness,

After a few days, the convinced Master Zhang assured Lu Shi that he would make such gunpowder to kill the enemy, and Lu Shi's face was frightened at that time, if he used such gunpowder to spray elm, it would be no different from suicide.

With the participation of Zhao Blacksmith mobilized a large number of manpower, a large number of explosives were safely manufactured. The next step is the granulation of gunpowder, granulated explosives are more than twice as powerful as those without granulation, but this time it is bitter for the people in the cottage, and they will no longer be able to eat chicken cakes for several months.

This process was completed under the strict supervision of the sergeant, and several key processes were only limited to a few people, and the secrecy was repeatedly emphasized, and these core figures swore by their ancestors that they would never leak the recipe and core secrets.

On the day of the experiment, all the important leaders on the cottage came to the scene, and there were a sea of soldiers and people outside the scene, Lu Shi didn't want to hide the effect of the finished product from everyone, let everyone see, firstly, so that everyone would not be frightened, and secondly, there was also the idea of calming people's hearts.

Lu Shi first asked people to dig a one-meter-deep arm-thick hole with a steel drill on a huge rocky mountain, and then poured about 30 catties of black explosives into it and carefully tamped it, sealed it with kraft paper layer by layer on the outside, and then took out the lead, and then asked everyone to hide outside the safety range, and a brave soldier lit the fuse, and the soldier ran quickly to a safe place after igniting it, and immediately lay down.

Quiet time passed, nothing happened, everyone looked around with doubts on their faces, and when they looked at Lu Shi, they saw that King Chuang was in front of him, and he stuffed two small cotton balls into Chunlan's ears, and when everyone didn't know why, they suddenly felt the earth under their feet tremble, and then a thick stream of dust and black smoke erupted on the distant mountain wall, followed by an earth-shattering explosion, and the huge sound shook the ears of everyone present, and they were dizzy.

Look at the half of the mountain wall suddenly shook for a moment, and then the whole collapsed, and the high-flying arrows and stones flew in all directions, and some fell into the crowd of spectators, causing a miserable scream. Looking at the people nearby, they all staggered and collapsed as if they were drunk, only the military advisor and Chunlan were still there with their mouths wide open and pointing. Waiting for the dust to clear, everyone got up, but saw Lu Shi take out two small cotton balls from his ears with a smile, and pointed to the gray-faced Guo Tianxing and laughed loudly. At this time, everyone knew that they were being tricked by Lu Shi, so they chased and fought in a swarm.

The third uncle ignored the juniors' fighting, looked at the mountains of rubble in front of him, and was really dumbfounded, and said in his heart; "It will take hundreds of people to carry the stones for a few days, so are we afraid that the dam we are going to build will lack stones? Then it will not be effortless for us to repair the city wall in the future and close the road? ”

Wu Tao, who finished the fight, was also stunned by such a result. the way of the heart; "As soon as this gunpowder comes out, what is the impregnable fortified city in the world?

Chen Ce thought back to the scene of the explosion; "If he is used in war, is there still an army in the world that can resist it?"

Everyone was very happy that they had mastered this groundbreaking miracle.

After everyone dispersed, the third uncle discussed the construction of the dam with the military adviser in the house of the craftsman camp.

The first problem of the dam is the problem of water seepage, which once made Lu Shi very entangled, because now although there is lime, but it is not cement, the strength is not high, he will not make cement, even if there will be no raw materials and factories, if he builds a factory, then he doesn't know that it is the year of the monkey and the month of the horse, but when the third uncle knew that Lu Shi was entangled, he was really speechless, he didn't understand that King Chuang, who was like a god, didn't know anything about these common things. Why is that?

Since it is rare that Lu Shi does not understand, the third uncle is also happy to be a teacher, in this era to build a dam, is to first choose the dam site and then pile stones into the river, which is no different from the modern era, but the next step is different from the modern, the stone wall is two together to the middle of the river, between the two stone walls to pile loess, pour a layer of soil to tamp a layer, so that the layer of height is extended, so that the problem of water seepage of the dam is solved, and the problem of the solidity of the dam is also solved.

With sufficient stones, the third uncle began to gather people to build a dam on a river, which did not require Lu Shi to supervise the work again, and with the sharp weapon of explosives, of course, it was a multiplier with half the effort.

Lu Shi is now soaking in the craftsman camp, directing the students to draw drawings of Dutch windmills, and leading more than a dozen carpenters to work hard day and night, during which Zhang Erlang played a huge role.

The mountains of Huluyu are full of hundred-year-old trees, but the raw materials are not worried. The craftsman originally had the style of learning, these new things, everyone was very interested, no one felt bored, Lu Shi saw that everyone would read the drawings and began to get started, so he left them, leaving a few students who were interested in the compass triangular ruler, and rushed to Zhao Tie's blacksmith's workshop with other students.

Lu Shi also knew that it was a bit of a suspicion to take students in this way, but there was no way, the cottage must use this rare period of time to develop vigorously, otherwise once the official army recovers its strength and launches a clean-up, it can only deal with the war with all its might.