A simple trick convinced these Taoists, but Yang Heng did not ask them to continue working. He also needed them to study chemistry. If they were tired of them, how could they study anything else?

"Dear Taoist priests, I will give you a task first, that is, you go to the old farmers now, what do you want you to do, that is, mix your turmeric extract, or the liquid you applied on paper, with the soil in each field, and then record their color changes."

What is this? In fact, Yang Heng wanted to use the simplest method to distinguish the pH of some land. Although it is not very accurate, it can roughly distinguish what kind of crops are planted in what kind of soil. Also, Yang Heng plans to transport some soil from outside in the future to plant crops in these soils. This is a long-term project, but after the trouble of these Taoist priests, Yang Heng was inspired, and he wanted to let scientific planting appear in advance.

"Little Langjun, what turmeric and paper are we not sure?" Several Taoist priests began to pretend to be confused. This was the guys they were eating, so they naturally would not admit it.

"Why, you are not going to give up until the Yellow River is right? Have you forgotten Da Qingfeng's hand?" Who is Da Qingfeng? It's strange that he is the hot Taoist priest. There are more Taoist priests called Qingfeng Mingyue, but fewer of them have other names. There are two Qingfeng and two Mingyue among the five Taoist priests. It seems that they have learned a few tricks from the master and started to cheat. If it is an old Taoist priest, they are basically unwilling to mention this name.

These two breezes and two bright moons. Yang Heng didn't want to waste time. Naturally, he called them the big breeze, the little breeze, the big breeze, the little bright moon, and the other one was called the Ming generation, and the star.

"We know, we know, we will do whatever we want." Several Taoist priests said helplessly. This made Yang Heng grab the handle. First of all, they couldn't even figure out why they could put their hands into the hot oil pan. Naturally, they didn't dare to compete with Yang Heng in other aspects. They couldn't say what moves were there, or they could go up to the sword mountain and go down to the sea of ​​fire.

Not to mention, if these Taoist priests did not agree, Yang Heng would really give them a sword mountain. At this time, there was a sword mountain, and these Taoist priests might not know. Even those who know it may not be able to understand the truth. The Fire Sea is the same, and these are all scary, simple, and can be done with any preparation. Unfortunately, they did not give Yang Heng this opportunity.

So these Taoist priests did not develop gunpowder, so they first developed the pH of the soil.

Yang Heng had nothing to say about the steel research. As long as the workers made the chimney first, they could produce samples. After the samples were released, Yang Heng would take them outside and use a water-powered grinding wheel to identify the steel flowers of these steels, and he could also make some things. If the hardness was, Yang Heng didn't know what kind of steel size was and what kind of steel flowers. However, he used the No. 45 steel more in his previous life, so he remembered it clearly.

A few days later, Yang Heng found that he had nothing to do here in the valley. The steel blast furnace and gunpowder houses were all under construction, especially these places needed rest and rest. They had to level the stones first before they could start construction. The old farmer had nothing to do. The seeds had been planted, and they were waiting for flowering, pollination, and even grafting.

When Yang Heng came out, he found that Changle, Yuzhang, and Xiaoniang had been waiting for him here for several days. "Mr., why did you come out? The father asked someone to send a message to you and let you enter the palace for a few days. I have heard from you that if there is nothing important, don't go to call you inside. I asked my father's messenger, and he said he was not in a hurry, so he didn't call you." Changle wanted to be obsessed with Yang Heng now, and dared to leave Li Er's messenger aside and wait for Yang Heng to come out. If Yang Heng had something to do inside, would he keep asking the messenger to wait?

"Brother-in-law, I don't know what my father asked you to do. Could it be that I went to the garden to break up that vine and was discovered by my father?" When Yu Zhang was so timid, wasn't it just a grape vine? Yang Heng thought that even if Yu Zhang burned the entire garden, Li Er would not frown. Could it be that he was scared by the last time when Xiao Meng was in trouble? This was Li Er's sin.

"Brother Heng, the emperor called you, it was not for the last incident, I was so scared." "Okay, okay, don't worry. Your Majesty probably knew about the matter in the mountains. There was nothing wrong. This was just that Your Majesty was curious. Your Majesty just asked me to ask." Yang Heng said casually. What Yang Heng did was not kept secret from Li Er. At this time, Li Er called him, so it was naturally for the oil pan. This is easy to say. Just demonstrate it and it will be just a good idea to popularize chemistry knowledge for Li Er.

In the worried eyes of everyone, Yang Heng was very casual and followed the messenger to set off.

"Sister-in-law, Brother Heng will not be in trouble." When her own people were in trouble, the little lady suddenly lost her mind and was very worried about Yang Heng. This is also human nature, and it is normal to lose her mind for her relatives. This is often the case that accidents occur.

"You're okay, sister, have you not heard from your brother Heng? He knows what's going on. Otherwise, I'll go and ask for it." "Okay, I'll go with you too." So the second wave of people entering the palace also appeared, namely Changle, Yuzhang and Xiaoniang. However, their worries were unnecessary. Now Li Er was not too late to protect Yang Heng. First of all, just studying grain seeds made Li Er happy. What political achievements can be more successful than increasing the income of the people. Naturally, there will be more things that will increase grain output and lead to lower grain prices. There is also the fact that grain is cheap and hurt farmers, but this will always be better than starving people to death. When the food is cheap, the court will be much easier to rescue disasters.

Sure enough, Li Er was concerned about Yang Heng’s matter about fried kids. “Tell me, what’s going on with your fried kids? Don’t fool me and say there is really a kid.” “Your Majesty, I’m about to tell you about this. Otherwise, your Majesty, you can send someone a pot, then a bucket of vinegar, and then a bucket of soybean oil.”

No explanation can be made clear, only practice is the right reason, so Yang Heng decided to demonstrate it on site to Li Er to save him from suspicion. Although he was very calm, Yang Heng obviously felt that Li Er was shocking him, and Li Er was still a little nervous.

"Your Majesty, look at this vinegar. Come on, let's light the fire below." As he said that, Yang Heng poured the vinegar into the pot and half a pot. The fire did not burn for long, and the vinegar started and boiled.

"Your Majesty, look, there is nothing wrong with putting my hands in it. Of course, this requires training. Ke Chen is a blacksmith and is resistant to heat. Or a guard, you put your hands in. It doesn't matter. The fire below has been withdrawn. Or you can put a finger in." Yang Heng pulled a palace guard over casually. The guard was very scared. Can this boiling thing really put down? He just dare not let go of it.

"Come here, you." Yang Heng didn't wait for Li Er to say anything, but directly pulled the guard and even hugged him horizontally, grabbed one of his hands, and put it directly into the hot vinegar.

"Ah..." A scream was shocking, "What are you calling? Look at your hands, aren't you doing well?" As he said that, Yang Heng continued to rinse his hands with water.

"Hahaha, my hand is still there, my hand is fine, ah, Your Majesty, I'm rude." As he said, the guard knelt down directly, and even trembled with fear, "Okay, okay, get up, don't make a fuss about it in the future. I won't give you any hardships. I'm fine if I didn't see my son-in-law. Look, I'm scared you, isn't it just jealous?" As he said, Li Er even wanted to put his hands into the jealousy.

"Father, what are you going to do?" (To be continued, please search for Astronomy, novels are better, updated and faster!

ps:(This has this statement, and it has not been verified, please do not imitate it.)
Chapter completed!