The two princesses left satisfied, they took Li Er's task, showed all the construction of Yang Heng's family, as well as some new things, and even asked Yang Heng to make three stoves for them before leaving, and then left happily.

Speaking of the stove, this is also to blame Yang Heng for being cheap, what are you saying is not good, the reason is this.

"Yang Heng, do you say there is a device that can boil water for heating without firewood and grass and biogas?" Needless to say, this is one of Li Er's tasks, to ask about the use of coal, because in some places, those secret guards did not go, they think that there should be no secrets in that place, what period can a group of mud legs do, but Yang Heng asked them to dig the soil and build houses with adobe, so they missed the matter of burning bricks, and when the black smoke was filled all day here, they found out that it was too late, and the two princesses had already brought the secret back.

"Otherwise, you can naturally make briquettes and burn the stove, but you can also burn coal directly, these are two kinds of furnaces, but you can also use them in two, but I think it is better to use them well, each has its own benefits, that is, you need to make a stove and an iron cylinder," yes, Yang Heng found another thing for himself to do. After finishing speaking, Yang Heng regretted it, and even slapped his face with hatred, isn't this asking for trouble for himself, if there is a blacksmith at home, it is good to say, but now there is a blacksmith at home, but this blacksmith is himself, although the father is also a blacksmith, but the father is in the barracks, the old lady is a blacksmith, the old lady is pregnant again at this time, and she can't let a pregnant woman come out to do things, so she has to work hard, and I don't know how the housekeeper does it, don't you know how to buy a blacksmith and come back, If the housekeeper hears Yang Heng's complaints, the housekeeper will be very aggrieved, most of the blacksmiths at this time are from the official family, even if they make mistakes, they are also serving sentences in the official family, so naturally there will be no external sales.

And for making a stove, the stove is easy to make, but the iron cylinder is difficult to make, when Yang Heng is playing iron, every time he thinks about it, he regrets straightening his mouth, this mouth, how can he owe it so much, look at this big summer, but also sweat in the blacksmith room, after enjoying a few years of happiness, Yang Heng found that he has become a little lazy, and can command people to do things, that is absolutely not to do it himself, but just to move his mouth.

What is he playing, naturally it is an iron tube, the furnace, it has been done a long time ago, make a sand mold, and then burn some molten iron and pour it directly into it, you don't even need to use charcoal to burn, just make a furnace to melt iron ore, once the molten iron comes out, you can pour the mold, and soon the furnace will be done, and the thin iron sheet, temporarily Yang Heng has not thought of a way, so he has to make some iron sheets slowly, but although these iron sheets are relatively ugly, they can be thick and durable, aren't they? It takes some strong labor to install it.

What, you said iron ore, there is a princess here, has no ore been shipped yet, besides, this does not need some fine things, it is naturally a shelf of coal to burn this iron red fast, and it is also fast, and there is no need to forge repeatedly, just need to make the required shape, at this time, Yang Heng swore that he must get a few blacksmiths at home.

During the time that Yang Heng was making iron barrels, he also slowly figured out one thing, that is, blacksmiths are only available in royal families, so it is better, and there is no need to trouble the second master in this matter.

"I said two princesses, you see that I am here on a hot day to prepare a winter stove for you, I work hard, and there is still a little thing missing in this stove, you see if I prepare the stove first, or hit the iron cylinder first, anyway, I am alone, I can't be divided into two bodies to use, otherwise, you will use it again next winter, I can prepare slowly."

"Okay, Yang Heng, when I look at your expression, I see something again, you say, as long as I can agree, I will promise you." This is naturally Li Li's quality, only she can say this, Yu Zhang, she hasn't practiced it yet, it's really young.

"Ah, Sister Lizhi, you really have to help Brother Heng, or you can find a few blacksmiths, and then replace Brother Heng to make the iron tube, see that Brother Heng is tired during this time." Yang Heng's cooperation with these younger brothers and sisters is quite tacit, especially with Xiao Niang, this brother and sister, it is really to the point of combining two swords, as soon as Yang Heng speaks, Xiao Niang knows what Yang Heng wants, in fact, the people who follow Yang Heng, after a long time, will see that only playing iron sheets is the easiest work in this, and the others are important jobs, especially Yang Heng said that there is a lack of things in the furnace, so there is naturally a lack of things, and it should be the most important one.

"Hey, what should I be, isn't it a blacksmith, I will talk to my father, and a blacksmith will come soon, and it is a death contract." Li Lizhi waved her hand very generously, even if this matter is solved, what the housekeeper hasn't done for a long time has been done in just one sentence, no wonder every traverser has to move closer to the royal family. Yang Heng sighed secretly, isn't he too.

What is missing in the furnace that Yang Heng said, it is naturally the furnace core, the furnace core, is a kind of adobe made of refractory sand and yellow mud, if this furnace does not burn briquettes, maybe there is no need for this furnace core, if it is a dual-purpose furnace, then naturally the furnace core is needed, refractory sand Yang Heng has seen it in the mountains, clay is everywhere, it is easy to find, but after Yang Heng is finished, it is difficult for someone to imitate it.

After this everything was in place, Yang Heng suddenly found that there was still a lack of a manual mold for making briquettes, yes, Yang Heng once again needed to do it himself, although this mold is very simple, but it can be done, it is also very troublesome, especially if there is no welding, if you want to fix the twelve iron needles, it will also waste Yang Heng for a long time, and after the most Lu He still picked a simple thread to give the twelve needles, just like that, you have to check the looseness of these needles from time to time, Otherwise, you will make unqualified briquettes.

"Father, we're back, and we've brought you good things, and I've learned how to cook." This is Yu Zhang, who followed Yang Heng to learn the technique of stir-frying, and it is naturally simple Li Er has to show off it well.

"Father, don't listen to her, she just learned a scrambled egg, and she doesn't put salt, if she is allowed to put salt, maybe she will be salted to death, maybe she will light people to death."

"Sister quality is bad, sister quality is bad, Yang Heng said, this egg is good for people to eat without salt, it can cure cough, it can also relieve cravings, if you mix it with some sugar, it will be even more delicious, or, father, I'll scramble an egg for you to eat."