Hearing Zhang Yi's voice, the third uncle woke up immediately, and the third uncle's son and daughter-in-law next to him also stepped forward to greet Zhang Yi.

"Master, is there anything wrong with me so late?" After seeing the li, the third uncle asked his family to recognize the people and went to the inner room and gave the main room out so that the three of them could discuss the important matters.

In his opinion, Mr. Wang was a person who would not enter the Three Treasure Hall for no reason, and there must be very important things.

Of course, these things are generally secrets in the village, and keeping the family from participating is actually a disguised protection.

Zhang Yi naturally couldn't think of this. He picked up a boiled pea and threw it into his mouth, chewed it, and it tasted very good. Then he asked his third uncle: "Uncle San, do you know there is charcoal near our farm?"

"Carbonite?" Uncle San was a little surprised. Why did he ask about this thing? But he still replied: "Master, don't you want that thing to make a fire?"

"Yes! This thing is resistant to burning and has a large reserve. Is it available in our farm?" Zhang Yi nodded and said solemnly: "I seem to have seen it somewhere in the farm, but I can't remember it, you know?"

Speaking of carbonite, the third uncle's face looked a little ugly, and then he advised: "Master, carbonite is not a good thing, it hurts people! You should use firewood! I know you want to save some dry firewood, but it cannot be used!"

As he spoke, the third uncle's face became a little complicated, and his lips began to tremble slightly. After a while, he said with difficulty: "I'm going to hide it from you, uncle, the old man's youngest son died on this charcoal! I still remember that winter was very cold, and the mattress at home was thin, so cold people couldn't stand it...

So I made some charcoal on the ridge of the back mountain and returned to make a fire to keep warm. That night was very warm and everyone in the family slept very sweetly. But the next morning I got together and the smell of charcoal in the room was full of, so I hurried to their brother and third place to get them up. I didn't expect it! The eldest, the second son was unconscious, the third son... just..."

No need to think about it, Zhang Yi knew very well that this was gas poisoning!

In fact, it is no wonder that the ancients had almost no chemical knowledge, and even if there were any, it was revealed by Taoist priests such as Taoists during the alchemy process. However, after the appearance, they did not make it public. On the contrary, they would package some seemingly magical things in it and say that they were successful in cultivation, thus creating the illusion of endless magic powers for people.

It is precisely this kind of self-confidence that, starting from the Western Jin Dynasty, these methods were firmly controlled by this small group of people within a certain range. If outsiders want to know, it is almost like this person talking about his dream.

Things like gas poisoning are obviously much more profound. This topic has obviously not been studied in the self-confidence Taoist knowledge, so the mining and use of carbonite becomes so unpopular. Even old people like the third uncle blindly believe that carbonite itself contains toxins that can kill people.

Thinking of this, Zhang Yi felt that it was necessary to give his third uncle a good idea of ​​the use of carbonite and gas poisoning.

Zhang Yi immediately spoke, "Uncle San, this carbonite itself is not poisonous!"

"Not poisonous?" Uncle San and Lao Zhong both spoke out, looking at Zhang Yi in disbelief.

"Of course it's not poisonous!" Zhang Yi affirmed again, and then explained: "Just like eating dog meat, you can't use willow chopsticks, dog meat itself has no toxins, but on the contrary it is a very nourishing ingredient. But once you come into contact with willow, it becomes a poison that can kill people!

The reason why carbonite can cause people to die unknowingly is that it will emit a large amount of carbon monoxide inside it during combustion. Of course, you don’t understand this thing. As long as you know that this thing is harmful to people, it is the culprit!

So as long as we control the emission of this carbon oxide, we can safely use it to make fire and cook, or even smeltein iron!”

"Really?" Uncle San was still a little disbelief.

"Of course it's true! In fact, using this carbonite is very simple. We just need to slightly correct the structure of the house!" Zhang Yi pointed to the thatch above his head and said, "Let's treat this room as a kitchen. Since it's a kitchen, we naturally have to cook and cook again!"

As he said that, Zhang Yi placed the low table in front of him for the wine and food as a work kitchen, and gestured, "Uncle San, Lao Zhong, look, this table is like a stove, and below is the stove with firewood added. We usually put the firewood here and light it for cooking.

But think about it, if you use this method to make a fire, whether it is blocks of firewood or grass firewood, the smoke is particularly heavy when it is burned, and if there is a certain amount of moisture inside, then this meal will be a life-threatening life after cooking!"

Both the third uncle and the old Zhong agree very much with Zhang Yi's statement.

As Zhang Yi said, in fact, whether it is a high-ranking official or a small civilian household, cooking in the kitchen is almost the same. Not to mention cooking, just making fire is very hot, and for this, a special profession was even derived - the fire-burning girl!

Although this fire-burning girl has a bad reputation, it is definitely not easy to become a fire-burning girl.

Because they can generate fire very quickly and can skillfully control the size of fire, such as low fire, martial fire, and even other different names, they are proficient in all kinds of fires with different fires.

The most important thing is that they produce less thick smoke from burning fire, and few people can do this.

Usually, fire-burning girls with this skill usually work in high-ranking families, or are talents specially trained by these families.

"Master, do you want to find a fire-burning girl?" Old Zhong couldn't help but say, "But if that's the case, we won't find someone for a while!"

"And the money for the fire-burning girl is not cheap..." Uncle San also interrupted.

When they thought, since this charcoal is useful, they only need to pay attention to the charcoal that is burned out, it is very appropriate to hire a fire-burning girl. Uncle San was fine, but he didn't know that Zhang Yi was cooking for the new food group that was about to be built, but Lao Zhong knew it. He thought that if this charcoal was really useful, even if he hired one or two fire-burning girls, he could save a lot.

"It's all right for the fire girl, but what do you think if we add a chimney here specifically to disperse smoke?" Zhang Yi said as he stood up on the low table, saying, "This smoke is like bamboo, round, but the middle must be empty. Just make a hole in the roof of the room and lead to the outside. In this way, the smoke will be discharged to the outside with the chimney, and the people inside will naturally no longer have to be surrounded by smoke and fog!"

"ah!...."
Chapter completed!