future library.

Chapter 257 He Ling
The earliest production of sulfuric acid became popular around the 15th century.Sulfuric acid can be obtained directly by co-heating vitriol and sand, or by burning sulfur and saltpeter together.

In today's Great Xia, the manufacturing process has not been greatly improved, and the astromancers only need a small amount of sulfuric acid. Since the astromancer apprentices are not curious about the bear's ability to resist burning, naturally there is no urgent need for sulfuric acid.

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

Under Cheng Jinzhou's subtle influence, Bai Jing and others have long set the first step of industrialization on sulfuric acid. Although the lead chamber method was proposed by Cheng Jinzhou, it was completely completed by their own experiments.Xiao Cheng couldn't help with all kinds of difficulties.

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

With a flowing tail, Yisu got out from behind Cheng Jinzhou, looked around and said, "The agent is really comfortable."

"Could it be more comfortable than 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, there is no way to compare with businessmen."

"A Chinese-style civil servant, or an American-style?" Cheng Jinzhou knew that Yisu understood the world before time travel.

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

"Poor customer service." Cheng Jinzhou shrugged and said with a sigh of relief: "It's a pity that we are not a big businessman, otherwise this little Buddha will be tortured to death, and let him enjoy the past and future lives of fighting against Buddha."

"There is a whole planet for you to develop without interference, if I can't help it." Yisu shook his head and said: "In recent years, there are very few Star Alliance agents who can have your luck. Yes, cherish it. The current customer service probably won't let you have any leisure time, maybe he has already done it."

Cheng Jinzhou didn't like the terrifying 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 a part of the Star Alliance, have a seat in the Senate, and enjoy the fruits of corruption..." Yisu I don't know what to think of, and my tone becomes cynical.

Cheng Jinzhou raised his eyebrows, but of course he couldn'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 lead container and burn it with fire around it.Here is a coal mine, so there is no shortage of fuel. Raw materials can be bought from other places and brought back by water.Cheng Jinzhou can also find ways to reduce costs.

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

Cheng Jinzhou knew the problem with the lead room method, but he still listened carefully to Bai Jing's explanation, and several other astrologers 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.

Until Cheng Jinzhou was sent back to the county government, Bai Jing was in a state of elation.

……

June [-]th is the hottest time in Jinchuan Prefecture.

The green big-leaved tree species all drooped their heads, not daring to show their faces to Father Sun.The grasses were a little more courageous, hiding in the shadow of the bushes and having fun alone.A few mice ran along the path stepped on by people, like mountain climbers, and stopped when they reached the top of the small mountain. version of the Solar Wolf.

The knights in the convoy wear standard armor, with heart guards and knee pads, and the mail armor on the shoulders is draped over the shoulders in a relaxed manner, without any tilted posture—are there any handmade suits or standard suits that have specially treated the shoulders? Often the price difference is 10 times, and so is the armor.

If there were descendants of generations of nobles present, he would surely have noticed that the armor of the cavalry knights was exceptionally good, and the costumes of the leaders might be worth more than the fiefdoms of the minor nobles.It's a pity that in the barren Deping, no one cares.

Although no one can read his own armor, no one can read his thoroughbred.The knights were still stubbornly fully armed, only taking off their helmets and hanging them on the front of the saddle, holding the whip in one hand, and keeping their waists straight.

"It's 30 kilometers away from Shaonan. When we arrived at Shaonan County, the congratulatory order of the imperial court was announced. Everyone has a three-day holiday and can play casually. Now cheer me up." The leading knight purely controlled the horse with his legs and leaned on his left hand Holding his own sword, he assumed the posture of Mr. Zhuo Shijia.It's a pity that he is a little older, and his voice has become hoarse due to the rush for the past few days.If he was 10 years younger, the knight's husky voice might be called "magnetic".

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

"What are you doing in such a hurry, I want to see how he exploits De'an in Yurou Township." The harsh tone also came from the rear, but it was a well-known son of 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 didn't cheat, or anything like that.

Master Astromancer wanted to follow, and the Astromancer Association and the imperial court who sent 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 astro-warlocks to congratulate the second-level astro-warlock.

Formal celebrations should have formal rules.

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

"Safflower, you go." Zhou Dunhu ordered cleanly.He is a standard battlefield aristocrat, nearly 50 years old, and kills a few people every year to maintain his mental and physical youth and health.In the past, he often went to the battlefield. In recent years, he often slaughtered prisoners to make up for it. Anyway, he is one of the few knights in Daxia who has seen a real battlefield.

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

Not to mention the combat effectiveness of the noble knights, but their weapons and aura 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 are daring, not only killed chickens and fought, but also may 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 the nobles are often disproportionate. A thoroughbred horse can support an army of 100 people until they die of old age. The fierce horse tossed to death.

However, Hong Hua, who had just turned the intersection, quickly kept rushing back.

Tian Shimin straightened up, knowing that something unusual happened.

Finally, she was a young man with aristocratic qualities. Honghua didn't shout, but only whispered in front of Zhou Dunhu: "The front seems to be the boundary of De'an County."

"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 horse to come to Zhou Dunhu's side, looked at his star array, and said, "We calculated the distance correctly, we are still [-] kilometers away from De'an."

"Then why..." Mu Yin said as he flew away from the horse, and then he was speechless in a daze.

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

The canal with a width of [-] meters flows quietly. Two hundred-foot-long sea boats that can only be seen in the harbor are parked on the edge of the wooden pier. Countless bearers go up and down, carrying large or small sacks.

It is wide enough for four carriages to travel side by side, and merchants come and go one after another.The strong mules and horses snorted, and the old cow with broad shoulders lowered its head and dragged the flatbed cart forward vigorously.

Facing the left side of the knights, there are coal mountains higher than the main hall of the imperial palace, one after another, until the corner of the canal where the end cannot be seen.And 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 choked out a sentence: "It's not the harvest season yet."

……

(End of this chapter)