"...Son of God, this magnet is really a good thing!
Get some more, absorb the iron sand, and then use the iron sand to make iron tools. If we mainly live here, we can also produce some iron tools ourselves, and we don't have to always transport them from the Tieshan residential area."
In the house on the east side of the house where Han Cheng was, Wu, who came here with his daughter in his arms, said to Han Cheng with a smile, constantly praising the usefulness of the magnet, and hoping that the magnet would be used in the future.
The role of tribes was conceived.
After saying these words, Wu looked at Han Cheng expectantly, trying to see some emotions on Han Cheng's face such as, "Wu is so awesome, you have already figured it out before I even said it."
Come.
However, Han Cheng, who had already found some tools and was about to do something, was stunned for a moment after hearing Wu's words.
Han Cheng had never thought about magnets attracting iron sand and then letting people use the iron sand to make iron tools.
If this magnet had appeared earlier, and iron ore and copper ore had not been found in the tribe, and they were smelted with them, then the magnet appeared in the tribe, then of course the first thing I thought of was not to use the magnet to make a compass, but to make a compass like a witch.
As mentioned, use the magnet to attract the iron sand, and then use the iron sand to create some iron tools.
But now, the tribe has copper mines and iron mines, and it has been able to produce serious iron tools through smelting.
Under such circumstances, it would be a bit redundant to use magnets to attract iron sand and then use the iron sand to make iron tools.
In other words, it’s not worthwhile.
Because using iron sand to make iron tools requires a lot of it.
Sometimes it looks like there is a huge pile there, but in fact, if you actually use it to make iron tools, you won't be able to make much.
Compared with smelting iron ore, it is far behind.
Moreover, obtaining iron sand is also very troublesome, requiring people to constantly turn over the sand, which is very laborious and time-consuming.
In later generations, Han Cheng saw people sucking iron sand into the river.
The flat river bed was filled with piles of sand and deep pits...
Under such circumstances, he naturally lacked interest in letting people absorb iron sand and then use it to make iron tools.
Wu is originally a wise person. Over the years, with the development of the Qingque tribe, Wu has experienced more things and is now more knowledgeable.
Before Han Cheng even opened his mouth, he could already see the clues of what was going on just from the change in Han Cheng's expression.
Wu was deeply shocked for a while.
After all, the idea of using magnets to absorb iron sand and then making iron tools was something I only came up with after racking my brains for a while.
I was so excited about this that I came here to find the Son of God to verify, but the result was completely different from what I thought.
But apart from attracting iron, this magnet has no other characteristics besides being black!
"Son of God, does this magnet have other uses?"
Wu thought about it carefully and felt that he really couldn't think of anything. He immediately gave up struggling and started asking Han Cheng directly.
After living in the tribe for such a long time, Han Cheng already had a very thorough understanding of Wu Zao.
When you see a witch asking such a question, you don't try to comfort the witch. This is unnecessary and too pretentious.
According to Wu's character, even if he feels a little disappointed in his heart, it won't take long for him to get better.
"Witch, this magnet does have other uses. For example, with it, we can use it to create tools that can identify directions.
I call this tool a compass.
After it was manufactured, one end of the thing always pointed south, so it was called a compass.
As for the four directions of east, west, south, and north, you only need to determine one, and the rest can be determined as well.
With this tool, people in our tribe can rely on the compass to identify directions when walking outside without worrying about losing their way."
Han Cheng explained the witchcraft.
When Wu heard what Han Cheng said, he felt relieved and nodded.
"This thing is good. The direction is not confusing, so it is not easy to get lost. People in our tribe will be less in danger when walking outside."
Wu spoke up and answered.
Obviously, he had also remembered the time before when a trading team from their tribe encountered something dangerous while going out.
"Son of God, what does a compass look like? Have you made one?"
After finishing his emotion, Wu asked Han Cheng again.
"I'll make a simple compass first for you to see."
Hearing Wu's question, Han Cheng immediately became energetic. After all, when this thing involves something like physics, Han Cheng has one of the few confidences.
Hearing what Han Cheng said, Wu also became energetic.
Just what Han Cheng said before, Wu's curiosity was already aroused by Han Cheng.
He really wanted to see what this magical thing looked like.
It has such great use, and it still points stubbornly to the south. Thinking about something like this, it makes people feel particularly magical.
And Han Cheng also started to take action.
He had already prepared the necessary tools before, so he didn't have to look around for it, he just started doing it.
Han Dashenzi walked outside, brought another bowl, filled the bowl with more than half of the water, and placed it on the table in front of him.
Then he sat in front of the desk, picked up an iron needle, placed it on a small magnet, and rubbed it back and forth.
This matter lasted for about a minute, Han Cheng stopped his movements, took the rubbed iron needle and moved it to the other iron needle.
Then a miracle happened, the needle was sucked up directly by the iron needle in Han Cheng's hand.
Seeing such a scene, Wu who was standing on the side could not help but widen his eyes.
This is really magical. The Son of God just rubbed the iron needle in his hand on the magnet. The iron needle, which was originally an ordinary iron needle, became possessed of the characteristics of the magnet and was able to use the iron needle to
Hooked!
Under Wu Man's curious gaze, Han Cheng put aside the iron needle that had been checked and confirmed to be magnetized.
Then pick up a piece of paper on the side and fold it with your hands to make a crease about two centimeters wide and five centimeters long.
After folding it, use the scissors placed on the side to cut it off.
Then the magnetized iron needle was threaded along the length of the paper.
The two ends of the iron needle are on one side of the paper, and the middle section of the iron needle is on the other side of the paper strip.
After adjusting it, Han Cheng picked up the quill pen again, dipped it in ink, and wrote the words "North" and "South" on both ends of the paper.
After writing it, pick it up and carefully place it squarely on the bowl of water that is already very stable.
The side with the words "north and south" written on it faces up.
When Han Cheng put the note with the magnetized iron needle into the pottery bowl, he deliberately did not put it upright, but placed it facing east and west.
After you put it away, something wonderful happened.
This piece of paper was originally oriented east-west. After it fell on the water, it automatically began to rotate slowly.
After turning a small half circle, the magnetized needle and the note on the needle changed to face east and west, and stopped there steadily, no longer moving.
But what is a little embarrassing is that the end of the paper marked with south is firmly pointing to the north, and the side marked with north is also pointing to the north.
Even though Han Cheng gently poked it a few times with a small wooden stick, it was still extremely stubborn with the small piece of paper attached to it.
After the thing stopped, it was still the same as before, with the end marked south pointing firmly to the north...
Standing on the edge, with great reverence and full of novelty, Wu was ready to see the strange things and increase his knowledge. He looked at the scene that happened in front of him and was a little confused for a moment.
What is all this?
Doesn’t it mean that after this thing is completed, it can always point south?
Why are the north and south directions wrong? Even if you try to correct it, you can’t correct it?
In Wu's confusion, as the person who did this himself, Han Dashenzi also sniffed in embarrassment.
He used two small wooden sticks to pick up the small piece of paper and the iron needle heel floating there like picking up vegetables.
At this time, after floating on the water for a while, the note had become limp.
Under such circumstances, it is impossible to use it again.
Han Chenggong once again cut out a piece of paper of similar size from the paper on the side. The words "North and South" were still written on both ends of one side of the paper.
After writing it, Han Cheng pulled the iron needle out of the wet note, and then used the same technique to thread it through the note as before.
The only difference from before was that this time Han Cheng turned the iron needle around when he threaded the iron needle through the note.
After doing this, Han Cheng started again and carefully placed the piece of paper flat on the water in the bowl.
This time Han Cheng deliberately placed the end with the word "South" facing north, and then things became different.
Driven by the iron needle, the piece of paper began to rotate, and it stopped after turning half a circle on the water surface.
Then the side with south written on it points to south, and the side with north written on it points to north.
Even if you use a small stick to move it, after the small piece of paper stops, it can still point north and south steadily.
This is considered a success.
Wu looked at the scene in front of him and found it novel, but despite the novelty, he still felt a little disappointed.
Because there is a big gap between what I see in front of me and what I think in my heart, as well as the miraculous effects described by the Son of God. It is really too simple.
Han Cheng naturally knew what Wu was thinking.
Because when I was in the second grade of elementary school, I made this after a lot of hands-on work. While feeling novel, I also had the same idea.
After all, the compass makes people feel particularly high-class when listening to it.
And this method, which is made with a bowl of water, a small piece of paper, and an iron needle rubbed on a magnet, is indeed very different from the imaginary instrument with magical effects.
difference.
"Witch, this is the most basic thing. It is used to prove whether this thing is easy to use. If you want to create a convenient and easy-to-use compass, you still need to do a lot of things.
After all, such a compass is too simple and inconvenient to use."
Han Cheng smiled and said to Wu...
Han Cheng learned how to make a compass using the bottom of a can in a hands-on practical class later in life.
At that time, many people, including Han Cheng, were very happy to use the bottom of cans as compasses.
After all, when he was young, it was an era when supplies were relatively scarce.
At that time, except for a few households, many households did not have cans or bottles.
In the school's practical classes, cans need to be used.
Under such circumstances, students can openly ask for some money from their families to buy a can of soda, which is simply something that makes people crave for existence on weekdays, and drink it for a while without mentioning that feeling.
How wonderful it is!
Of course, at this time, we don’t even think about cans and the soda they contain.
However, without the bottom of the can, it was still difficult for Han Cheng. After all, many things in the tribe were slowly developing.
Now there are two things in front of Han Cheng that are very similar to the bottom of cans.
It's just different from the aluminum or aluminum alloy material at the bottom of the can.
The two objects in front of Han Cheng, which looked exactly the same in size and shape, were made of copper.
It was a drawing drawn by Han Cheng, and he explained it in detail to Heiwa, a tribe member who made ceramics and molds and was a master-like person in the tribe. After some exploration,
manufactured.
Behind the two copper objects placed in front of Han Cheng, there were many defective products that had been melted.
Han Cheng carefully studied the two things in front of him for a while, and looked at them back to back.
After seeing that they were facing each other very orderly, they started to take action.
However, before taking action, he still recalled in his mind the matter of making a compass in his future life to avoid any mistakes.
After doing this for a while, Han Cheng officially took action.
He started first, using a thin drill to drill a small hole in the center of the two things.
Then the two copper objects were glued together with fish bladder glue.
Then a small copper rod with an extra smooth top was stuffed into the hole in the center and fixed with fish bladder glue.
After doing this, Han Cheng brought another round piece of cardboard...
