The night was quiet, and the small flame at the entrance of the cave flickered weakly for a long time, as if it was about to fall asleep like everyone else in the cave.
The old primitive man would keep watch beside the fire, putting some firewood in it from time to time.
Keeping the flame from going out is a very important task.
The emergence and use of fire is a major leap in the history of human evolution!
The tribe also learned how to make fire by rubbing two sticks together, but it was too troublesome. It would be more convenient to send someone to guard it day and night as it is now.
Anyway, these two old primitive people are old and basically can't do the rest of the work.
There was leather under him, and a thick layer of dry grass under the leather. Han Cheng's sleeping place was more comfortable than that of most people. If it were at this time in the past, he would have fallen asleep long ago, but tonight, he had no desire to sleep.
There are generally only two reasons for insomnia at night. One is sleeping too much during the day, and the other is having something on your mind.
In later generations, the first reason can basically be ruled out.
As Han Cheng came from later generations, he could also rule out the first reason because he didn't even close his eyes the whole day.
The reason why he couldn't sleep at night was that his mind was full of thoughts about pottery.
He kept recalling every step of the old lady's pottery making in his memory, and then compared it with the process he was doing this time, trying to find out the reason for the big difference between the two.
He had been thinking about this matter from day to evening and then late at night, but he still didn't have much of a clue.
Although three somewhat suspicious places were found, Han Cheng always felt that this was not the main reason for the large-scale damage to the pottery.
Han Cheng sat up from his bed, put on his leather coat, put on his fur socks, and walked out of the cave. He had a habit brought from the later world, which was that if he couldn't sleep at night, he liked to get up at night.
The old primitive man who kept watch at night had long been accustomed to people going out at night to take care of physiological problems.
Every time someone stood up, he would turn around to take a look. If it was an adult, he would continue to sit by the fire and not get up. If it was a child, he would need to stand up and help the child open the heavy stone door.
This is also one of his responsibilities.
When the old primitive man heard the footsteps, he turned his head out of habit. After recognizing that the person coming was the Son of God, he quickly stood up.
Before Han Cheng could say anything, he had already skillfully opened the stone door.
It was completely silent outside, with only the bright stars embedded in the dark blue sky. It looked exceptionally clear and beautiful, far from being comparable to the night sky of later generations that had gone through several layers of haze and passed through neon lights everywhere.
In the darkness of night, from time to time there would be a few distant roars of beasts that seemed to blend into the night. These were the chants of the ancient bosses who were still in a dominant position in the night.
The air was cold in the spring mornings and it was no less cold at night. Although it had not yet reached the point of freezing, Han Cheng, who had just come out of the cave, still shivered several times, so much so that even the crystal clear water column became a little crooked.
Han Cheng was trying hard. He wanted to quickly drain the water from his body and return to the warm cave.
“Bang!”
Han Cheng did not go back, nor did he fall into the urine pit because of peeing too hard. Instead, he raised his hand and slapped himself hard on the forehead.
He was not crazy, but he suddenly figured out something, which was the thing that had troubled him for the entire day and half the night!
Damn it, I actually overlooked such a simple truth!
Han Cheng, who suddenly understood, wanted to slap himself on the head again.
The reason why pottery cracks in large quantities is very simple, it is because of thermal expansion and contraction!
After warming up my body and coming out of the cave, I couldn't help shivering when I suddenly came into contact with the cold air. The temperature difference was only about ten degrees at most.
When the pottery is just out of the kiln, the temperature difference goes from extremely hot to extremely cold, and is more than 100 degrees!
It would be strange if it didn't crack under such strong stimulation!
After figuring out the relationship, Han Cheng felt relieved and reached out to touch the little bird that was left with only its head left from the cold, and quickly ran back into the cave.
His worries gone, he lay down on the bed, covered with thick fur, and soon fell asleep...
The riverside is very lively, because having witnessed a miracle and experienced the usefulness of mud-fired pottery, the people in the tribe now have a great passion for pottery making.
Especially after hearing that the Son of God was going to make pottery again today, everyone became even more enthusiastic.
After having breakfast early in the morning, they all went to the river.
With the experience from last time, everything went much more smoothly this time.
However, compared with last time, this time we will have to fire a lot more pottery.
Surrounding the mud pit that had become somewhat solid due to the fire last time, Han Cheng had people dig a lot more around it. After the excavation, the pit was almost four square meters in area.
Then they spread hay, put mud, fill the hole with hay, paste mud, light a fire and seal the hole.
All that remains is to wait.
The eldest brother and his companions went hunting, and Han Cheng brought a group of little primitive people here to make clay molds while guarding this simple clay kiln. They observed the temperature and small holes on the clay seal to see if the fire inside had been extinguished.
Because there are already enough clay embryos for the bowls, if they are all fired successfully, it will be no problem for everyone to have one.
So Han Cheng ordered people to reduce the production of bowls and make more pottery jars and large vats which were in short supply.
We also need to make some pottery basins.
There were already a lot of mud pieces, so there was no need to rush like before. After noon, Han Cheng led people to clean up the mud by the river and returned to the cave.
Because I have been busy with pottery these days, I have put aside the teaching of Mandarin and Chinese characters. Now that the pottery-making is basically on track, Han Cheng naturally has to continue the course that had been interrupted for a few days.
What we are teaching today is very simple, which is the newly emerged "pottery", including its pronunciation and writing, as well as the "pottery bowl", "pottery jar" and "jar" derived from "pottery".
Since everyone was very interested in the newly appeared "陶", even though the character "陶" was relatively complex and difficult to write, everyone learned it very quickly, especially Heiwa, the little master of pottery making. He could not remember the characters before, but now he can write the character "陶" very quickly...
Around the burning fire, there were three stones of almost the same height arranged in a triangle. On the stones was a newly made pottery jar with water in it.
Under the constant licking of the flames, white steam had begun to rise from the water in the clay pot.
This made the old primitive man who had been worried that the fire would crack the pottery and then the water would put out the fire breathe a sigh of relief.
He, like the rest of the people in the cave, had no idea why the Son of God was behaving so strangely, but now they had become somewhat accustomed to it. After all, the Son of God had done too many things that they couldn't understand.
Han Cheng didn't want to do anything, he just wanted to boil some hot water to drink.
He has been here for several months, and except for the hot urine he urinates, he has never come across any other hot water. It's really sad to say it.
The water in the pottery jar was steaming but wouldn't boil, which made Han Cheng a little depressed. It seemed that he had to make a lid immediately. This would not only prevent dust from falling into the water, but also keep it warm.