"This official wants to reward you with two female prisoners of war to take home as concubines, and you are not allowed to refrain from giving birth to a few more children, this is not only for the sake of your Hu family's inheritance, but also the key to retaining this craft. At the very least, it is to contribute to the Great Song Dynasty, and at the most large, it is to benefit all mankind. Tell your father that the cost of the concubine will be paid by the official, so don't make a fool's calculation. ”

After seeing the ammonium sulfate crystals that had begun to crystallize in the sulfuric acid pool, Hong Tao was really convinced and convinced. I only have the memory of a broken head, and I am afraid that I will not be able to achieve anything without the help of a craftsman like Chou'er.

In order to pass on these traditions and crafts as they are, and not to break the dynasty, Hong Tao had to force the craftsmen to take concubines. One of these people has a stinky problem, that is, they are unwilling to pass on their skills to outsiders, and the more skilled they are, the more unhappy they are to pass them on accidentally.

Let them teach their disciples in the workshop to hide and hide, and tell you all the techniques on the surface, except for the slightest trick.

Hong Tao couldn't solve this problem, so he could only pray that the apprentices had good brains and could summarize it by themselves, or simply marry the daughters of the masters and become sons-in-law.

But this is not insurance, an old craftsman like Hu Er is nearly seventy years old, and he will return to the west one day if he can't keep it. I don't have the right to force them to teach them, but I can force their descendants to have more children, and I don't want to pass them on to outsiders, so I won't even pass them on to my grandchildren.

As long as it can be passed down from generation to generation, the youth league members who help Lian'er record the craftsmanship of craftsmen will have the opportunity to understand all these things, and then write books and talk about them, and they will never be afraid of losing them again.

"Hey, hey, hey" ugly is already a top master, but his temperament hasn't changed at all, except for the best skills, you and him have nothing to do in vain, except for a smirk and a few words of stammering, I can't understand what he wants to say.

"Don't think about what you drool, as long as Wang Da is there, don't think about taking a concubine, and the official can't agree, she can cut you and your concubine into mutton slices."

In addition to the ugly child laughing, Gao Yu on the side was also laughing, laughing so obscenely. Hong Tao felt that it was necessary for him to say ugly things to the front, so as not to make him think of anything wrong.

"Students have never thought about it"

"It's useless to think about it, if I live for a day, you will die of this heart. However, the credit for the discovery of ammonium sulfate this time must be credited to you, say it, you can mention any official position and gold coins you want, don't have any worries" Hong Tao is happy, the cotton cloth has not seen a shadow yet, and there is another big killer, and God will not do it if he wants to become the richest man.

Although this kind of fertilizer was not discovered by Gao Yu, at least half of the credit should be attributed to himself and the ugly child, but Hong Tao felt that Gao Yu should still be rewarded, and he must be rewarded heavily, the credit is too great, and the three of them can't share it.

"The students want to go home to see that the father is still alive, and it is disobedient for the son to leave home for a long time and not return. If the teacher does not allow it, the student will obey it, and there is nothing else to ask for."

"You weren't sued by your father to the government before you were confiscated, if you hadn't caught up with the amnesty, I'm afraid you would still be working in the box service, I don't hate your father"

Gao Yu's origin has long been inquired about by Zhu Bajin's apprentices, he was really not a good thing when he was young, and his father was so angry that he would not be good, otherwise he would not take the initiative to sue his son to Kaifeng Mansion.

"Don't hate it, it was a student back then, no wonder my father" Speaking of this, Gao Yu was still a little sad, the tears did not fall, but the circles under his eyes were already red.

"Come on, you pack up, go to Suzhou to call your daughter-in-law back first, and then take it home to get married. But you can't stay long, you have to go back quickly, can you do it?"

A son who does not take the right path, repents after more than ten years, and still makes a difference in his career, and returns to his hometown with his new daughter-in-law's fresh car and angry horses, and fine clothes, this drama is too positive.

Even if Hong Tao didn't have any idlers at hand, he couldn't bear to refuse this request. If he waits for a few more years, Gao Yu may not be able to see his father, so he won't hate himself for the rest of his life.

"Lord Xie's grace of recreation" Gao Yu didn't have much expectations for this request, and suddenly got a promise that he could also take his daughter-in-law who had not passed the door home together, and the huge sense of happiness immediately broke down the originally strong nerves, tears gushed out, and he knelt on the ground and came three times. This is already the etiquette of recognizing your father, and you don't have to be so polite when you see the emperor.

"You are also an officer of the New Army, and you are a person who has experienced life and death, so don't engage in this kind of vulgar etiquette. Get up, go to Mrs. Lian's to pay a hundred copper coins, get some fine furs, take the official's car away, and bring a few more good horses, which will be regarded as a congratulatory gift from the official. Don't shake your head, it's not for you, it's the dowry that the official gave to my daughter, lest the king say I'm biased in the future."

Hong Tao didn't want to see women crying, and men were even more annoyed when they cried. When I thought that Wang Da was going to become someone else's daughter-in-law, my nose was a little sour. This topic must be turned quickly, lest he also cry in public, and weaken the prestige of the Heavenly Evil Star.

Gao Yu is gone, why should he go Hong Tao will continue to prepare ammonium sulfate. The next step is to find a way to remove these impurities and water as much as possible to obtain relatively pure ammonium sulfate crystals.

How to separate impurities and water in ammonium sulfate solution Chemical method Hong Tao will not, but you can try it physically, such as a centrifuge

This thing is often found in the laboratory, and the most common is that when the blood and urine samples are tested in the hospital, the blood and urine samples are first put into the centrifuge and turned.

Due to the very high angular velocity of the centrifuge and the different centrifugal forces of the substances with different specific gravity, the mixed solution will be stratified, just like a cocktail, each different substance honestly stays at different levels, so that it is easier to separate according to the needs.

Hong Tao didn't have a high-speed centrifuge available, but he could make a simpler hand-cranked centrifuge with a simple gearing system. Or simply build a larger, hydraulically driven centrifuge to facilitate industrial production.

This is a process of stratification, extraction, re-stratification, and re-extraction, and finally obtain a very high concentration and high purity ammonium sulfate solution, and after recrystallization, a white ammonium sulfate solid is obtained.

When used, it only needs to be melted with water and then sprayed in the soil, but it cannot be used with alkaline fertilizers, such as lime and plant ash, which will produce an acid-base neutralization effect and greatly reduce fertility.

So what proportion of ammonium sulfate fertilizer should be used, Hong Tao doesn't care, give it to the children in the laboratory, and take the greenhouse test with Gaoyu. After planting and pulling seeds, you will soon have an accurate answer. As for the more refined use method, it is up to the farmers themselves to sum up, anyway, whoever summarizes well will have a high harvest.

But what made the children strange was that the officials were not satisfied with the already pure ammonium sulfate crystals, and they were not enthusiastic about the production process, but went into Gao Yu's laboratory, drove everyone out, and stayed in it from morning to night all day, not knowing what they were messing with.

This toss is more than a month smaller, and I hardly participate in anything except necessary meetings, and even the habit of persevering and exercising with special forces every day has changed. This made Lian'er and Sidi very worried, but every time they went to the laboratory to check, they would be scolded and driven away.

In the middle of July, another crowd and a carriage came from the road to heaven, starting with a man and a woman. The man has a round head and a round head, and a black face and beard; The woman had thick eyebrows and big eyes, a straight waist, and the four or five people who followed her were all dressed in camouflage uniforms of the new army.

The newlywed Wang Da and Gao Yu are back, they are really going to go back quickly, and they will bring it for a month and a half, even if they use the marching speed of the new army, they will stay in Kaifeng for less than ten days at most.

"Shut up, who dares to ask more about marriage, don't blame the official for being merciless, and he will take care of the banquet, and there will be no shortage of your food and drink"

As soon as she entered the city gate, Wang Da saw Wang Erhe and Yigan's acquaintances who came to congratulate her, but she didn't have the slightest hint of shyness as a new daughter-in-law, let alone any sense of happiness, but put a straight face like issuing a military order, blocking back the questions that everyone had already thought about.