The two princesses left with satisfaction. They took Li Er's mission and showed all the construction of Yang Heng's family and some new things. Before leaving, they even asked Yang Heng to make three stoves for them, and then left happily.

Speaking of stoves, it’s also a big blame for Yang Heng’s humble words. What’s wrong with saying that? This is the reason.

"Yang Heng, do you think there is a device that can boil water and heat without firewood or biogas?" Needless to say, this is one of Li Er's tasks, and he has to ask about the use of coal, because in some places, the secret guards did not go there, and they think there should be no secrets in that place. When a group of mud legs can come, but Yang Heng asked them to dig mud and build adobe for building houses, so he missed the matter of burning bricks. When the smoke was filled all day long, they realized that it was too late, and the two princesses had already brought the secret back.

"Other, you can naturally make coal balls and burn stoves, but you can also burn coal directly. These are two types of stoves, but they can also be used in two-in-one. But I think it's better to use them separately. Each has its own advantages, that is, you need to make a stove and an iron tube," Yang Heng found something for himself. After saying that, Yang Heng regretted it and even slapped himself in the face hatefully. Isn't this causing trouble for himself? It would be okay to have a blacksmith at home, but now there is a blacksmith at home.

But this blacksmith is himself. Although the father is also a blacksmith, he is in the military camp and he is a blacksmith. I am pregnant again at this time. I can’t let a pregnant woman come out to do things, so I have to work myself and don’t know how the housekeeper does it. Don’t you know how to buy a blacksmith back? If the housekeeper hears Yang Heng’s complaint, the housekeeper will be very wronged. At this time, most of the blacksmiths are from the official family. Even if they make mistakes, they are also serving their sentences in the official family, so naturally there will be no one selling outside.

For making a stove, the stove is easy to make, but the iron tube is hard to make. When Yang Heng was playing with iron, he regretted his mouth straight whenever he thought of this. Why is this mouth so owed? Seeing that this summer, he was sweating profusely in the blacksmith's house. After enjoying the blessing of several years, Yang Heng found that he had become a little lazy. He could command people to do things, so he would definitely not do it himself, but just talk.

What he is working on is naturally an iron tube. The stove has been made long ago. Make a sand mold, then boil some iron and pour it directly into it. There is no need to burn it with charcoal. Just make a furnace that melts iron ore. Once the iron comes out, it can be poured into the mold, and the furnace will be made soon. Yang Heng has not thought of a way to do it yet, so he has to work hard to slowly make some iron sheets. However, although these iron sheets are ugly, they are thick and durable, so it is not that it requires some strong labor to install them when installing them.

What, you said, iron ore, there is a princess here, and no ore has been transported yet? Besides, this does not require some fine things. Naturally, coal is mounted to burn the iron red ones quickly and quickly. There is no need for repeated forging. It just needs to be made into the required shape. At this time, Yang Heng swore that he must get a few blacksmiths at home.

During the period when Yang Heng made the iron tube, he gradually figured out one thing, that is, only the royal family had blacksmiths, so it was better, and there was no need to bother the second master even if he had this matter.

"I'll say two princesses, look at me preparing winter stoves for you on this hot day. I'm working hard. Also, there's still a lack of things in this stove. Do you think I'll prepare the stove first? Or do I need to make the iron tube first? Anyway, I can't divide it into two bodies. Otherwise, you can use it again next winter, so I can prepare it slowly."

"Okay, Yang Heng, I saw that you were attracted to something again when you saw your expression. Tell me, as long as I can agree, I will agree to you." This is naturally Li Lizhi, and only she can say this. Yu Zhang, I haven't mastered it yet, so he is really young.

"Ah, Sister Lizhi, you really want to help Brother Heng. Otherwise, you can find a few blacksmiths to make iron tubes instead of Brother Heng. Brother Heng is exhausted during this period." Yang Heng has a very tacit understanding with these younger brothers and sisters, especially with Xiao Niang. The brother and sister have really reached the point of combining two swords. As soon as Yang Heng talks, Xiao Niang knows what Yang Heng wants. In fact, those who are following Yang Heng will see that only iron sheets are the simplest jobs in this place, and others are considered important jobs, especially when Yang Heng said that there is something missing in the stove, so it is naturally a lack of things, and it should be the most important one.

"Hey, what am I thinking? Isn't it just a blacksmith? I'll tell my father that a blacksmith will come soon, and it's a dead contract." Li Lizhi waved her hand generously. Even if the matter was resolved, the butler had not done it for a long time, and it was done in just one sentence. No wonder every time traveler has to move closer to the royal family. Yang Heng sighed secretly, isn't he the same?

What is something missing in the furnace Yang Heng mentioned? It is naturally the furnace core. The furnace core is a kind of adobe made of refractory sand and yellow mud. If the furnace does not burn coal balls, it may not be necessary. If it is a dual-purpose furnace, it will naturally be necessary. Yang Heng has seen refractory sand on the mountain. There are clay everywhere and it is easy to find. However, after Yang Heng finished making it, it is difficult for someone to imitate it.

After all this was done, Yang Heng suddenly realized that there was still a manual mold for making coal balls. Yang Heng once again needed to do it himself. Although the mold was very simple, it would be very troublesome to be able to be done well. Especially when there was no welding, it would take Yang Heng for a long time to fix the twelve iron needles. In the end, he still picked a simple thread to fix the twelve needles. In this way, he had to check the looseness of these needles from time to time, otherwise he would make coal balls of inconsistent quality.

"Father, we are back, and we have brought you good things, and I have learned how to cook." This is Yu Zhang, who learned the skills of cooking with Yang Heng. Naturally, Li Er should show off his skills after he was simple.

"Father, don't listen to her. She just learned to scrambled eggs, and she didn't add salt. If she asked her to add salt, she might kill people and might kill people."

"Sister Zhi is bad, sister Zhi is bad, Yang Heng said that it is beneficial for people to eat this egg without salt. It can cure cough and satisfy cravings. If you mix some sugar, it will be even better. Otherwise, Father, I will stir-fry an egg for you."
Chapter completed!