Chapter 1213 North Compass (2 in 1)

"... 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 ironware. Our main tribe can also produce some ironware by ourselves, so we don’t have to always transport it here from the Tieshan residential area. "

In the eastmost room of Han Cheng's house, 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 wishing that the magnet would be used in the future. The role of tribes is envisioned.

After finishing these words, Wu looked at Han Cheng expectantly, wanting to see some emotions on Han Cheng's face, such as "Wu is so powerful, I haven't said it yet, you have already figured it out" and other emotions Come.

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

Han Cheng didn't think about the matter of magnets absorbing iron sand, and then letting people use iron sand to make iron objects.

If this lodestone appeared earlier, iron ore and copper ore were far from being found in the tribe, and they were smelted with the two, then the lodestone appeared in the tribe, then of course the first thing I thought of was not to use lodestone to make a compass, but to make a compass like a witch. As said, use a magnet to absorb iron sand, and then use iron sand to forge some iron objects.

But now, there are copper mines and iron mines in the tribe, and they have been able to produce serious ironware through smelting.

Under such circumstances, it seems a bit redundant to use magnets to attract iron sand, and then use iron sand to make ironware.

Or it's not worth it.

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

Sometimes it looks like a huge pile, but actually using it to make ironware, not many can be made.

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

Moreover, the acquisition of iron sand is also very troublesome, requiring people to constantly turn the sand, which is very hard and troublesome.

When Han Cheng was a later life, he saw people sucking iron sand in the river.

The flat riverbed is full of sand piles and deep pits...

Under such circumstances, he is naturally not interested in letting people absorb iron sand and then use iron sand to make ironware.

Wu Ben is a wise man,

Over the years, with the development of the Qingque tribe, Wu has experienced more things, and now he is more accessible.

Before Han Cheng opened his mouth at all, he could already see the clues of the matter just from the change of Han Cheng's expression.

For a time Wu was hit hard.

After all, the matter of using a magnet to absorb iron sand and then make ironware was only thought of after racking my brains for a long time.

I was still so excited about this, I went here to find the Son of God to verify it, but the result was completely different from what I thought.

But apart from attracting iron, this magnet has no other characteristics except blackness!

"Son of God, does this magnet have other uses?"

Wu thought about it carefully, 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 has a very thorough understanding of Wu Zao.

Seeing Wu asking questions like this, he didn't try to comfort Wu. This was unnecessary and too hypocritical.

According to Wu's temperament, even if he felt a little bit lost in his heart, it will get better after a while.

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

This tool I call a compass.

After it is manufactured, one end of this thing always points to the south, so it is called a compass.

As for the four directions of east, west, north, south, only one needs to be determined, and the rest can be determined as well.

With this tool, people in our tribe can rely on this compass to identify the direction when walking outside, without worrying about getting lost. "

Han Cheng explained to Wu.

Hearing what Han Cheng said, Wu felt relieved and nodded accordingly.

"This thing is good, the direction is not chaotic, and it is not easy to get lost. People in our tribe can avoid a lot of danger when they walk outside."

The witch answered the words out loud.

Obviously, he also remembered that when a trade team in their tribe went out, they encountered a dangerous situation.

"Son of God, what is a compass like? Have you made it?"

After sighing, Wu asked Han Cheng again.

"Let me get a simple compass out for you to see."

Hearing Wu's question, Han Cheng immediately regained his spirits. After all, when this thing involved something like physics, Han Cheng was one of the few sources of confidence.

Hearing what Han Cheng said, Wu also became energetic.

Just what Han Cheng said before, the curiosity in Wu's heart was already mobilized by Han Cheng.

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

With such a great use, it has been stubbornly pointing to the south. Thinking about such a thing makes people feel extraordinarily magical.

And Han Cheng also started to move his hands.

He had already prepared the necessary tools before, so he didn't need to search for them, he could just do it by hand.

I saw Dashenzi Han went outside, brought another bowl, which was filled with more than half of the bowl of water, and put it on the table in front of him.

Then sit 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, Han Cheng stopped his movements, took the rubbed iron needle, and approached another iron needle.

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

Seeing such a scene, Wu who was standing by the side couldn't help but widen his eyes.

This is really quite miraculous, the son of God just rubbed the iron needle in his hand against the magnet, and this ordinary iron needle also has the characteristics of this magnet, and can also give the iron needle to the magnet. sucked!

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 a crease about two centimeters wide and five centimeters long by hand.

After folding it, use the scissors placed on the side to cut it out.

Then thread the iron needle that has been magnetized along the length of the paper strip.

Among them, 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 pen again, dipped in the ink, and wrote the characters "North and South" on both ends of the paper.

After writing, I picked it up and carefully placed it squarely on the bowl of water that was already very stable.

The side with the word "North and South" facing up.

When putting the note with the magnetized iron needle into the pottery bowl, Han Cheng deliberately didn't put it straight, but put it facing east and west.

After putting it in place, amazing things happened.

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

After turning a small half turn, the magnetized needle, together with the strip of paper worn on the needle, turned to face east and west, and stopped there firmly without moving.

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

Even if Han Cheng gently touched it a few times with a small wooden stick, it was still extremely stubborn with the small note on the anvil.

After the thing stopped, it was still the same as before. The end marked with south was firmly pointing to the north...

Standing on the side, with a very reverent mind, the witch, who was full of novelty and was ready to watch and increase his knowledge, was a little dazed for a while when he saw the scene in front of him.

What is this all about?

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

Why is the north-south direction wrong? Still can't correct it?

In Wu's bewilderment, as the person who personally did this, Han Dashenzi sniffed in embarrassment.

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

At this time, after the note floated on the water for a while, it had become limp.

Under such circumstances, it is impossible to reuse it.

Han Chengcheng started again and cut a strip of paper with similar specifications from the paper on the side. The two ends of one side of the strip were still written with the characters "North and South".

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

The only difference is that this time when Han Cheng threaded the iron needle on the note, he turned the iron needle around.

After doing all this, Han Cheng started again and carefully placed the piece of paper 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 on it points to south, and the side with north on it points to north.

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

It was a success.

Looking at the scene in front of him, Wu also felt novelty, but despite the novelty, he still felt a little disappointed.

Because there is a big gap between what I see in front of my eyes and what I think in my heart and the miraculous effects that the Son of God said, it is really too crude.

Han Cheng naturally knew what Wu was thinking.

Because when I was in the second grade of elementary school, I made this after some hands-on work. While feeling novel, I also had the same idea.

After all, the compass makes people feel extraordinarily tall when listening to it.

And this method of making it with a bowl of water, a small piece of paper, and an iron needle rubbed against a magnet is indeed very different from the magical instrument in imagination. difference.

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

After all, such a compass is too simple and inconvenient to use. "

Han Cheng smiled and said to Wu...

As for the compass, Han Cheng learned how to make it from the bottom of a can in the hands-on practical class of later generations.

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

After all, when he was young, he was still in an era when supplies were relatively scarce.

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

In the school's practical class, it is necessary to use cans and bottles.

Under such circumstances, the students can justly ask for some money from their families to buy a can of soda that makes people crave for existence on weekdays. How wonderful!

Of course, at this time of day, the cans and the soda in them are out of the question.

However, without the bottom of the can, it was also difficult for Han Cheng. After all, many things in the tribe have gradually developed.

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

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 size and shape, were made of copper.

It was drawn by Han Cheng, and he explained it in detail to Heiwa, a tribe who made ceramics and molds, and was a master among the tribes. After some exploration, manufactured.

Behind the two copper objects placed in front of Han Cheng, there are many defective products that have 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 neatly aligned, they started to move.

But before doing it, he still recalled in his mind the matter of making the compass in his later generations, so as not to make any mistakes.

After a while, Han Cheng officially started.

He started first, using a thin drill, to drill a small hole in the center of the two things one by one.

The two copper objects were then bonded together with isingas glue.

Then a small copper rod with a particularly smooth top was stuffed into the hole in the center, and fixed with fish bladder glue.

After finishing these, Han Cheng brought another round piece of cardboard...