Future library

The earliest sulfuric acid production became popular around the 15th century. Sulfuric acid can be obtained directly by heating green vitriol and sand, or by burning sulfur and saltpeter together.

In today's Daxia, the manufacturing process has not improved much. The Star Warlocks only need a small amount of sulfuric acid. Since the Star Warlock apprentices are not curious about the bear's ability to resist burning, they naturally have no urgent need for sulfuric acid.

But Cheng Jinzhou wanted large-scale production, and simple process production was no longer suitable. Not to mention the huge waste of raw materials, the slow production speed is already unbearable.

Under the subtle influence of Cheng Jinzhou, Bai Jing and others had already set the first step of industrialization on sulfuric acid. Although the lead chamber method was proposed by Cheng Jinzhou, it was completed entirely by their own experiments. Xiao Cheng was unable to help with all the difficulties.

As a Ph.D. in physics, his understanding of chemistry is limited to theory. So-called industrial production is also part of practice in the scientific world of the 21st century.

With his flowing tail, Yi Su came out from behind Cheng Jinzhou, looked around and said, "The agent is really comfortable."

"Can it be more comfortable than the customer service?" Cheng Jinzhou glanced at the ring.

"Customer service is like the officials you know. They have great power, but in terms of comfort level, there is no way to compare with businessmen."

"Chinese-style civil servants, or American-style?" Cheng Jinzhou knew that Yi Su knew about the world before time travel.

Isu laughed and said, "Of course it's American."

"Poor customer service." Cheng Jinzhou shrugged and sighed: "It's a pity that we are not a big businessman, otherwise we would torture this little Buddha to death and let him enjoy the past and future lives of fighting and defeating Buddhas."

"There is a whole planet for you to develop without any interference. If I were to do so, I wouldn't be able to bear it." Issu shook his head and said: "In recent years, few agents of the Star Alliance have had such luck as you. Yes, you should cherish it. The current customer service probably won’t let you have any leisure time, maybe he has already taken action.”

Cheng Jinzhou didn't like the scary atmosphere created by his former customer service classmates, but he had to admit that the danger was real.

"You build your own industry, develop your own industry, and find products that suit you. Maybe in a few thousand years, you will become part of the Star Alliance, have a seat in the House of Representatives, and enjoy the fruits of corruption..." Ys I don't know what I thought of, and my tone became cynical.

Cheng Jinzhou raised his eyebrows, but of course he wouldn't answer.

Bai Jing half-pulled Cheng Jinzhou to see his laboratory. The lead chamber method is simpler, which is to pile sulfur and saltpeter in a container made of lead, and burn it with fire around it. This is a coal mine, so there is no shortage of fuel. Raw materials can be bought from other places and brought back by water transportation. Cheng Jinzhou can also find ways to reduce costs.

So the only trouble is the speed of production. Lead is not cheap. It exists to prevent it from being dissolved by sulfuric acid. In theory, there is no problem if it is changed to gold, but if it is changed to copper or iron, it cannot be used.

Cheng Jinzhou knew the problem with the lead chamber method, but he still listened carefully to Bai Jing's explanation. Several other star warlocks also looked at him with burning eyes.

At that moment, Cheng Jinzhou remembered the days when he was a substitute teacher in school. Silly freshman students always look at everyone on the podium with magical eyes. If there is a nymphomaniac little girl, they may even think that a certain young doctoral student is some kind of high-level existence - maybe at the age of 20 The kind of person who can make professors worship him.

Xiao Cheng suddenly said with a sense of responsibility: "It's done very well, not bad. It meets the needs, quite good."

Bai Jing, Liao Kai, Qian Lan and Zhu Jingsheng all jumped up, as if Cheng Jinzhou's recognition gave them great encouragement.

Bai Jing was in high spirits until he sent Cheng Jinzhou back to the county government.

…

June 5th is the hottest time in Jinchuan Prefecture.

The green big-leaved trees all drooped their heads, not daring to show their faces to Father Sun. The grasses are a little bolder and hide in the shadow of the bushes to have fun alone. A few mice scurried along the path trodden by people, like mountain climbers. They stopped when they reached the top of the small mountain peak. Standing on the hanging rock, they stretched their necks and looked at the winding motorcade on the provincial road, as if they were shrinking. version of Sunlight Wolf.

The knights in the team wore standard armor, with goggles and knee pads. The shoulder mails were draped gently from the shoulders without any upturned posture - are there any handmade suits or standard suits that have specially processed the shoulders? There is often a 10 times price difference, and the same goes for armor.

If a son of a noble family was present, he would definitely find that the armors of the cavalry knights were unusually good, and the costumes of the leading ones might be worth more than the fiefdoms of minor nobles. It's a pity that in the barren Deokpyeong, no one cares.

Although no one can understand one's armor, no one can understand one's thoroughbred horse. The knights were still stubbornly armed. They only took off their helmets and hung them on the front of the saddle. They held the whip in one hand and straightened their waists.

"It's 30 kilometers away from Shaonan. When we arrived at Shaonan County, the imperial court's order was announced. Everyone has three days off and can play as they please. Now I'm cheering up." The leading knight controlled the horse purely with his legs and leaned on his left hand. Holding his sword, he assumed the posture of a good young master in troubled times. Unfortunately, he was a little older, and the long days of traveling had made his voice hoarse. If he were 10 years younger, the knight's husky voice might have been called "magnetic."

"Dun Hu, either send someone to attack the front station first, or inform Cheng Jinzhou." The speaker was also sitting on a pureblood horse, but was wearing a scholar's robe.

"Why are you in such a hurry? I want to see how he exploits De'an in the fish and meat village." The harsh tone also came from the rear, but it was the famous young master in the capital, Mu Yinxing Warlock.

Ever since he saw Cheng Jinzhou's promotion in the Xia Jing Temple, Mu Yin went home and started training hard, constantly trying star charts, and spending all his time on mathematics. His progress was much greater than that of his peers, but before he could show it off to Cheng Jinzhou, he heard the news that Cheng Jinzhou was about to become a second-level star warlock.

Mu Yin must see Cheng Jinzhou with his own eyes to make sure that he is not cheating or anything similar.

Lord Star Warlock wanted to follow, and the Star Warlock Association and the imperial court that sent the gifts had no choice. Tian Shimin had no choice but to follow, but in the end he became the leader of the celebration team. You can't send three Star Warlocks to congratulate a Level 2 Star Warlock.

Formal celebrations should have formal rules.

Tian Shimin knew that Mu Yin didn't like Cheng Jinzhou, so he sighed and said: "There are just two of us, don't cause trouble. If you want to do something, record it and then talk about it when you go back. Don't make trouble yourself, understand? Dunhu, go Send someone to stand in front. There is no reason for an envoy to sneak into the place secretly."

"Red Flower, you go." Zhou Dunhu ordered neatly. He is a standard battlefield noble. He is nearly 50 years old. He kills several people every year to maintain his mental and physical youthfulness and health. In the past, he often went to the battlefield, but in recent years he often killed prisoners to make up the numbers. In any case, he was one of the few knights in Daxia who had seen a real battlefield.

Honghua is a young man with the three-flower emblem tattooed on his left chest. He leaned over and put on his helmet, then urged the horse to run, as if he was going to fight.

Regardless of the combat effectiveness of the noble knights, their weapons, equipment, and momentum are quite sufficient. In fact, in most cases, the combat effectiveness of noble knights is indeed several times that of ordinary soldiers. They have professional and wasteful equipment. They have practiced martial arts, learned the art of war and basic battlefield knowledge since childhood, and grew up listening to the battlefield stories of their fathers. They were so bold that they not only killed chickens and got into fights, but they might even have the experience of whipping servants and even killing passers-by. Nobles who are forced into a desperate situation will have a stronger sense of fighting than peasants, because their lives are more precious. Nobles who are not forced into a desperate situation will have a stronger sense of fighting than peasants, because they know how to fight.

Of course, the equipment and combat effectiveness of nobles are often disproportionate. A pureblood horse can support an army of 100 people until death. If Honghua's habit of sprinting at will is placed among civilian cavalry, he will either be beaten to death by the superior or be crotched. The fierce horse under the horse was tortured to death.

However, Hong Hua, who had just turned the corner, quickly rushed back with persistence.

Tian Shimin straightened his back, knowing that something unusual had happened.

Finally, he was a young man with aristocratic qualities. Honghua did not yell. Instead, he waited until he was in front of Zhou Dunhu and whispered: "It seems that the boundary of De'an County is ahead."

"Nonsense, at least 30 kilometers." Zhou Dunhu said, but he was not sure. It was very common to get lost during the march, but miscalculating the distance on the domestic provincial highway seemed to be ridiculous.

Tian Shimin gently urged the horses to come to Zhou Dunhu, looked at his star formation, and said: "We calculated the distance correctly, there is still thirty kilometers away from De'an."

"Then what..." Mu Yin said and flew away from his horse, then he was speechless.

A group of knights swarmed out of the corner, then looked at the scene in front of them, reined in their horses and stopped.

The canal with a width of 100 meters flows quietly. Two 100-meter seagoing ships, which can only be seen in the harbor, are parked on the edge of the wooden pier. Countless bearers are going up and down, carrying large or small sacks.

On the road, which is wide enough to accommodate four carriages, merchants came and went one after another. The strong mules and horses snorted, and the old oxen with broad shoulders lowered their heads and dragged the flatbed truck forward with all their strength.

Facing the left side of the knights, there are coal mountains higher than the main hall of the palace, one after another, until they can't see the end of the canal corner. On the right side of the knights, there are grain mountains higher than the mast of the ship, one after another until they are covered by the mountains.

After a long time, Zhou Dunhu held back a sentence: "It's not the harvest season yet."

…