Reducing the variety of currencies is conducive to the state's control over the economy. In addition, a new type of copper coin is currently being developed in secret, and of course, it is no longer possible to make it look like a square hole brother as in the past, but to make it into an ornate and complex pattern to prevent being forged.

Experiments with reeds and orange stems have been successful, and newspapers use this cheap paper. In addition, the rapid development of porcelain workshops has made porcelain, which used to be incredibly expensive, finally enter the dining table of thousands of households.

Hydraulic machinery has also been greatly improved, and now it is possible to use hydraulic lathes to turn out complete and smooth rivets, or screws with threads, with these two things, hydraulic machinery has now completely achieved steel structuring, and the situation that used to have to be repaired once every three to five days is no longer the case.

Moreover, after the adoption of standardized manufacturing, all the damaged parts can be replaced in time, and there is not only coal in Hancheng County that needs to be purchased from outside, but also iron ore is now purchased by Manguanzhong.

But fortunately, we are a traverser, the memory is better, the geography of the year is also learned well, at least the iron ore in Shaanxi in the later generations is mainly concentrated in Hanzhong, Ankang City, can be mined in later generations, indicating that the quality of its iron ore does have industrial value.

Nowadays, a large number of prospecting teams have been heading towards the southern Xicheng group (Ankang City) and Hanzhong, and there has been news that two ore sites have been discovered, and their grades and reserves are definitely higher than those of Yan'an County and Hancheng County.

This made me breathe a sigh of relief, after all, if you want to develop industry and commerce, mechanization is indispensable, and if you want mechanization, then metal minerals are a must.

"In addition, this is a metal pipe made by the Special Metals Research Institute using a hydraulic lathe, and I also asked the son to take a look. In addition, there is this" Speaking of this, Han Xiong carefully took out a wooden box from his arms, and took out an iron pipe about 2.5 centimeters thick and about 1.5 centimeters in diameter from inside, and in the other hand, he held a glass bottle, and inside the glass bottle was a slightly cloudy translucent liquid, and it also showed a pale green.

My eyes were fixed on the bottle of pale green liquid, and my liver was beating wildly, and Han Xiong next to me said very interestingly: "This thing is green alum oil, and it is also the dilute sulfuric acid you said." Just five days ago, Dean Yuan Tiangang and a group of Fang Shi brainstormed and finally came up with this vial, which was a sample. When Dean Yuan handed it over to Weichen, he also told him vigorously, don't let this stream come out of the bottle, otherwise"

"Dilute sulfuric acid, finally have ...... Wow ha. Ben Gongzi held this small bottle containing more than one or two liquids at most, and stood up excitedly and laughed, scaring Han Xiong and Sister Qingxia a lot, these two may still think that Ben Gongzi is insane.

"Childe, this thing actually makes you happy like this?" Sister Qingxia also didn't understand the surging excitement in my son's heart, and she leaned into my ear and whispered in a ghostly look, so she almost covered my forehead with her hand to see if I was dizzy.

"Do you know that this thing is very useful, and it is of great use to the country and the people. Tell you, this thing can not only be used in smelting metal, but also in the chemical industry and fertilizer, and what kind of oil, nitrate leather, ......" This son was very excited to spit on the stars and tell these two, in exchange for two pairs of confused eyes, damn, non-traversers really don't understand the ambition and great sentiments of the traverser, it is completely to play the piano to the cow.

Sulfuric acid, the most reactive binary inorganic acid, reacts with many metals. The high concentration of sulfuric acid has strong water absorption, and can be used as a dehydrating agent and passivating agent, carbonized wood, paper, etc., and blunt metal pipes.

Moreover, it can be used to make fertilizers, medicines, explosives, pigments, detergents, batteries, etc., and is also widely used in various industries such as purification and petroleum metal smelting.

With this thing, Ben Gongzi can make nitric acid, and then nitroglycerin will become the savior of human heart disease, and nitrate will become a better quality and more powerful explosive. In addition, concentrated sulfuric acid can be used to passivate metals, making it difficult for military equipment such as guns and cannons developed by Motoko to rust in the future, and similarly, the continuous working time of hydraulic machinery can be longer.

"By the way, Dean Yuan didn't say anything other than handing over this bottle to you?" After feeling sighing for a long time, Ben Gongzi asked Han Xiong.

"Oh, by the way, Dean Yuan also asked Weichen to bring a letter to you, the lord." Han Xiong patted his head, and with some annoyance, he reached into his arms and took out a letter and handed it to me.

In the letter, Yuan Tiangang, who has now become the director of the Hancheng County Academy of Sciences and the director of the Education Bureau, told me about the hardships and lengths of refining alum oil.

According to what he said, according to the sulfuric acid contact method I described and the distillation method used by the alchemist, the method of determining this son is easier to use and consumes less raw materials, and this bottle of dilute sulfuric acid sample was obtained in the test laboratory, and according to their calculations, it will take at least one to two years to work hard to make it on a large scale.

Seeing this, Ben Gongzi breathed a sigh of relief, not only regretting that sulfuric acid could not be produced on a large scale for the time being, but also very pleased that Yuan Tiangang was less and less like a god stick, more like a rigorous scholar, or in the outside, he made a back rubbing diagram? Well, it's possible that the back picture will be more rigorous and scientific.

Well, if you want to combine superstitious ideas with science, I really wonder if Lu Dao will create a new academic, perhaps, let this guy make a fortune-telling course in school? Well, this is also too much of a drag on our excellent traversers, although feudal superstition belongs to traditional culture, but we can't carry it forward too much.

I carefully handed the bottle of sulfuric acid to Sister Qingxia, and carefully told her to find a safe place to put it, I don't want myself or my family to disfigure myself out of curiosity, although it is dilute sulfuric acid, but I can't prevent it.

But this is the first bottle of strong acid named in history, and this son naturally wants to stay as a commemoration, or leave it to future generations to pay attention to, so that they can understand that advanced science and technology, it is under the guidance and guidance of this son that the science and technology of the Chinese nation can advance by leaps and bounds in the last years of the Sui Dynasty, and can unify the world two thousand years in advance?

Well, that's what it means anyway, so that future generations can't forget that science is the primary productive force of society.

After all of this, I turned my attention to another object, a hollow iron pipe with a silver glow. There is no way, dilute sulfuric acid is related to the development of Huaxia's chemical industry in the future, and this son naturally has to pay more attention to it, as for this iron pipe, of course, it is also very important.

Ben Gongzi picked up the iron pipe and looked at it carefully, and saw the flat and smooth inner wall, as well as the outer wall that was still a little not smooth, but also round enough, Ben Gongzi hooked his finger at Sister Qingxia, and Sister Qingxia, who understood it, walked into the back room quickly, and soon brought a micrometer to measure the size.

After carefully measuring this thing on the hollow iron pipe, the smile on Ben Gongzi's face became more and more, and the difference in the thickness of the wall pipe was almost zero, of course, this was also related to the large scale on the micrometer in Ben Gongzi's hand, but it cannot be denied that in this era, it is definitely an innovation of the times to be able to make such a standard round iron pipe.

This thing is slowly squeezed with a drill bit, and the iron pipe drilled out, so it is no wonder that this iron pipe does not give me much difference from the weight of the iron rod, it seems that those old craftsmen have mastered the cold spinning technique of steel pipes, at least this son can't make such a standard and smooth thing by himself.

"But the old craftsmen said that this thing was originally poured directly, but in this way, it could not be forged many times to remove impurities, like armor or weapons. Later, after many experiments, I finally came up with a method, first spinning the iron rod on the lathe into an iron pipe, inserting a steel rod into the tube that has been turned and polished, and then forging, and then extruding into shape......" Han Xiong frowned and recalled the words of those old craftsmen, and explained to me the production process of this iron pipe.

I couldn't help but be amazed when I heard it, this set of processes is really a bit complicated, but the weapons industry in later generations is afraid that it will be a hundred times more complicated than this. I was forced to play with this iron pipe with some joy, and after thinking about it, I asked Han Xiong: "It seems that this pipe is indeed enough to consume effort, has this pipe been tried?" When he said the last sentence, Ben Gongzi deliberately lowered his voice.

Han Xiong leaned in front of him very reverently and whispered: "According to the pattern you left behind, a sample gun has been made and tested, it can shoot through the plate armor within forty steps, and within a hundred steps, the leather armor can be broken, if it is farther away, it will not work." Unfortunately, it takes at least five days to make such a barrel, and the most difficult part is how to make the inner wall of the barrel smooth without a trace of burrs.

"Five days, that's pretty good." I nodded in satisfaction. "Qingxia, record, to Dean Yuan and each of their researchers who participated in the 101 plan, awarded medals, as well as bonuses, according to the amount of contribution, divided into three class, first class, one thousand guan, second class, eight hundred guan, third class, five hundred guan. In addition, the researchers involved in the 368 plan of the Weapons Research Institute should be dealt with accordingly. As the general person in charge of the scientific research plan of Hancheng County, Han Xiong also won a bonus of 1,000 yuan. ”

"Thank you, my lord, Weichen will be dead." Hearing my words, Han Xiong also knew the temper of his son, and he was not polite at the moment, but he bowed deeply to me very respectfully to show his loyalty.