“…… Son of God, this magnet is really a good thing!

Get some more, absorb iron sand, and then use iron sand to make iron tools, our main tribe here can also produce some iron tools by itself, and there is no need to always transport them from the Iron Mountain residential area to this side. ”

In the easternmost house where Han Cheng was located, Wu Wu, who came here with his daughter, said to Han Cheng with a smile, constantly praising the usefulness of the magnet, and making a vision for the role of the magnet in the tribe in the future.

After saying these words, Wu looked at Han Cheng with some expectation, wanting to see some emotions such as 'Wu is so powerful, I haven't said it yet, you have already figured it out' from Han Cheng's face.

However, Han Cheng, who had already found out some tools and was about to do something, was stunned for a moment after hearing Wu's words.

The magnet absorbs iron sand, and then lets people use iron sand to make iron tools, Han Cheng didn't think about it before.

If this magnet appeared earlier, and iron ore and copper ore were far from being found in the tribe, and they were smelted with both, and the magnet appeared in the tribe, then the first thing I thought of was of course not to use the magnet to make a compass, but as Wu said, to use the magnet to absorb iron sand, and then use the iron sand to make some iron tools.

But now, the tribe has copper ore and iron ore, and it has been able to produce serious iron tools through smelting.

In this case, it is redundant to use magnets to absorb iron sand, and then use iron sand to make ironware.

Or rather, it can't be drawn.

Because it takes a lot of iron to make iron from iron sand.

Sometimes it looks like it's a big pile there, but you can't actually use it to make iron, and you can't make much.

Compared to smelting with iron ore, it is far behind.

And the acquisition of iron sand is also very troublesome, requiring people to keep turning the sand, which is very hard and troublesome.

When Han Cheng was in his later life, he had seen people sucking iron sand in the river.

The riverbed is flat, and there are piles of sand and deep pits everywhere......

In such a situation, he naturally lacks interest in letting people absorb iron sand and then use iron sand to make iron tools.

Wu Ben is a wise person, over the years, with the development of the Qingque tribe, and Wu has experienced more things, and now he is more accessible.

didn't wait for Han Cheng to open his mouth at all, just from the change in Han Cheng's expression, he could already see the clue of the matter.

For a time, Wu was deeply shocked.

After all, the matter of using magnets to absorb iron sand and then building iron tools was only come up with after racking my brains for a while.

I was still excited about this, so I went here to find Miko to verify, but the result was not at all what I thought.

But in addition to absorbing iron, this magnet has no other characteristics except for black!

"Son of God, could this magnet be of any other use?"

Wu thought about it carefully for a while, and felt that he really couldn't think of anything, so he immediately gave up struggling and began to ask Han Cheng directly.

Having lived in the tribe for such a long time, Han Cheng already knew Wu very thoroughly.

Seeing Wu asking such a question, he didn't comfort Wu or anything like that, which was unnecessary and too pretentious.

According to Wu's temperament, even if there will be a little loss in his heart, but it won't be long before he gets better.

"Wu, this magnet does have other uses, for example, with it, we can use it to make tools that can discern direction.

I call this a compass.

After it was manufactured, one end of this thing always pointed south, so it was called a compass.

And the four directions of east, west, north and south, only one needs to be determined, and the rest can be determined.

With this tool, the people of our tribe can rely on this compass to find the direction when they walk outside, without worrying about getting lost. ”

Han Cheng explained to Wu.

When Wu heard Han Cheng say this, his heart was immediately relieved, and he nodded accordingly.

"This thing is good, the direction is not chaotic, and it is not easy to get lost, and the people in our tribe can be a lot less dangerous when they walk outside."

Wu replied.

Obviously, he had already remembered the time before, when a trade team in their tribe was out and about in danger.

"Miko, what does a compass look like? Did you make it? ”

After sighing, Wu asked Han Cheng again.

"I'll get a simple compass out for you to see."

Hearing Wu ask this, Han Cheng suddenly came to his senses, after all, when this thing involved something similar to physics, Han Cheng became one of the few places where he had confidence.

Hearing Han Cheng say this, Wu also came to the spirit.

Just Han Cheng's previous words, the curiosity in Wu's heart had already been mobilized by Han Cheng.

He really wanted to see what this amazing thing looked like.

has such a great use, and has been stubbornly pointing to the south, such a thing, just think about it makes people feel extraordinarily amazing.

And Han Cheng also began to move.

The tools he needed had already been prepared before, so he didn't have to look around, just do it.

I saw Han Dashenzi go outside, bring another bowl, fill the bowl with half a bowl of water, and put it on the table in front of him.

Then sit down in front of the table, pick up an iron needle and put it on a small magnet, and rub it back and forth.

This matter went on for about a minute, and Han Cheng stopped what he was doing, took the iron needle that had been rubbed against him, and leaned over to the other iron needle.

Then a miracle happened, and the needle was directly sucked up by Han Cheng's iron needle.

Seeing such a scene, the eyes of the witch standing on the side couldn't help but widen a little.

This is really amazing enough, the son of God just rubbed the iron needle in his hand on this magnet, this originally ordinary iron needle, has also become a magnet, and can also suck the iron needle!

Under Wu Man's curious gaze, Han Cheng put aside the iron needle that had been examined and determined to be magnetized.

Then he picked up a piece of paper on the side and folded it with his hand to create 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 strip of 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, Han Cheng picked up the quill again, dipped it in ink, and wrote the words north and south on both ends of the paper.

When I had finished writing, I picked it up and carefully squared it into the bowl of water, which was already very smooth.

The side with the words north and south written is facing up.

When he put the paper strip with the magnetized iron needle into the pottery bowl, Han Cheng deliberately did not put it in the right place, but placed it in the east-west direction.

When you put it away, something amazing happens.

This was originally an east-west note, but when it hit the water, it automatically began to rotate slowly.

After turning a small half turn, the magnetized needle, and even the note on the needle, became an east-west orientation, and stopped there steadily, no longer moving.

It's just a little embarrassing that the end of the note marked with south points to the north steadily, and the side marked with north also points to the north.

Even if Han Cheng gently flicked it a few times with a small wooden stick, this small note with an anvil was still extremely stubborn.

When the thing came to a standstill, it was still the same as before, marked with the south end, and pointed to the north steadily......

Standing on the side, with a very reverent mind, full of novelty and ready to see the strange and increase his knowledge, looking at the scene in front of him, he was a little stunned for a while.

What is this?

Doesn't that mean that once this thing is done, it can always point to the south?

Why is this wrong direction from north to south? Can't be corrected?

In Wu's confusion, as the person who did this in person, Han Dashenzi also snorted a little embarrassed.

He used two small wooden sticks to pick up the small piece of paper and the iron needle that were floating there like vegetables.

At this point, the note floated on the surface of the water for a while, and then it had become soft and collapsed.

In such a situation, it is impossible to reuse it.

Han Chengcheng once again started to cut a note of similar specifications from the paper on the side, and the two ends of one side of the note were still written with the words north and south.

After writing it, Han Cheng pulled the iron needle off the wet piece of paper, and then threaded it on top of the paper in the same way as before.

It's just that unlike before, this time when Han Cheng threaded the iron needle on the note, he turned the iron needle around.

After doing this, Han Cheng moved again and carefully placed the piece of paper on the water surface in the bowl.

This time, Han Cheng deliberately placed the end with the word 'south' written on it facing the north, and then things were different.

The piece of paper began to rotate under the impetus of the iron needle, and it was only after half a circle on the surface of the water that it stopped.

Then the end with south points to south, and the side with north points to north.

Even if you use a small stick to move it, when the little note stops, it can still point steadily to the north and south.

It was a success.

Wu looked at the scene in front of him and felt novel, but in addition to 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 and the miraculous effect that the Divine Son tells about, it is really too simple.

Han Cheng naturally knew Wu's thoughts.

When I was in the second grade of elementary school, I did it myself, and I felt the novelty of it, and I had the same idea.

After all, the compass makes people feel extraordinarily tall when they hear it.

And this method of using a bowl of water, a small note, and an iron needle that has been rubbed on the magnet is indeed very different from the imaginary instrument with a miraculous effect.

"Wu, this is the most basic thing, it is used to prove whether this thing is easy to use, and there are still a lot of things that need to be done to make a convenient and easy-to-use compass.

After all, such a compass is too rudimentary and too inconvenient to use. ”

Han Cheng said to Wu with a smile......

The compass is a thing, Han Cheng learned how to use the bottom of the can in the hands-on practical class in later generations.

At that time, many people, including Han Cheng, were very willing to use the bottom of the can to make a compass.

After all, when he was young, it was still an era when materials were relatively scarce.

At that time, except for a few people, many families did not have cans and bottles.

In the practical classes of the school, cans and bottles need to be used.

In such a situation, students can openly ask their families for some money to buy a can of soda that is simply a daily craving for existence, and drink it beautifully for a while, not to mention how wonderful it feels!

Of course, at this time of age, cans and soda cans are not to even think about it.

However, there is no bottom of the can, and it is also difficult for Han Cheng to be embarrassed, after all, there are many things in the tribe that have slowly developed.

Now Han Cheng has two things in front of him that are very similar to the bottom of the can.

It's just different from the aluminum or aluminum alloy material at the bottom of the can.

The two things in front of Han Cheng that looked exactly the same in size and shape were copper.

It was a drawing drawn by Han Cheng, and explained in detail to Heiwa, a tribe that combines making ceramics and molds, and in the tribe, who belong to the general existence of a grandmaster, and made it after some exploration.

Behind the two copper things placed in front of Han Cheng, there were many defective products that had been melted away.

Han Cheng carefully looked at the two things in front of him for a while, and looked at them back to back.

After seeing that they were very neat and tidy, they began to move.

However, before he started, he still recalled in his mind the matter of making a compass in his later life, so as not to make any mistakes.

After a while, Han Cheng officially started.

He started first, using a small thin drill, and drilled a small hole in the center of each of the two things in turn.

Then the two copper objects were glued together with fish maw glue.

Then a small, extremely smooth copper rod with a top grind was stuffed into the hole in the center and glued and fixed with fish maw glue.

After doing this, Han Cheng brought another round piece of cardboard......