Playing intrigue is worse than engaging in infrastructure

During the hard work of the craftsmen, the compass of the diamond-shaped magnetic needle was finally produced before the army set off.

But Song Qingyuan still didn't save those few excellent quality crystals in the end.

The main reason is that he discovered that a compass made with a silver needle as a support still needs a transparent cover on the top.

After all, if the magnetic needle is exposed to the outside, it is likely to be damaged during the march.

Song Qingyuan held a palm-sized compass and looked at it carefully. The craftsmanship of the craftsmen was very good. Except that the scale on the azimuth wheel was not as detailed as the compass of later generations, the rest were almost the same.

After confirming that there was no problem with the direction, he asked someone to send it to the deputy general.

Due to time constraints, the craftsmen only had time to make three compasses during this period.

Except for one for the army transporting food and grass, one of the other two was left in the royal court for emergencies, and the other was brought to Lianti, who might need it.

On the second day after getting the compass, the army transporting food and grass set off according to the originally planned route.

Now they not only have a detailed map, but also a compass to identify the direction, not to mention the foggy mountain road, even the deserted desert, they dare to venture into it.

After sending off the baggage troops, a side hall that was regarded as a workshop did not stop there.

Song Qingyuan did not forget what Amur said in his letter that many caravans were still stranded in Muhe Tribe because of the heavy fog.

Among the caravans in Mobei, how to identify the direction and walk through the Gobi grassland to the official road is a compulsory course for them.

A large part of the reason why the Du Wei family's caravan is so prosperous is that the Du family has been a businessman for generations, and they are very familiar with the terrain and environment from Mobei to Nanzhou.

However, if ordinary people do not have a guide with familiar terrain, they are likely to get lost in the vast wilderness of Gobi.

And this is one of the reasons that hinder the development of trade between Mobei and other places.

But if there is a compass, the probability of this happening will be greatly reduced.

The caravan temporarily stranded in the Muhe Tribe because of the heavy fog did not have to hesitate anymore.

It's just that natural magnets are rare, and it takes a lot of effort to make a compass. The transparent water jade cover on the outside is not affordable for ordinary people.

At this time, the effects of the several methods in the ancient books are reflected.

Those methods are a little troublesome, but apart from a magnetic needle, there is no other cost, and ordinary people can afford it.

The kind of compass wrapped in a metal shell is still for military use, and these low-cost methods should be the main way to promote it among the people.

Song Qingyuan called Dalantai, and just wanted him to send the several simple compass making methods he had written down to Amur, when he suddenly remembered that he had not solved the problem of the magnetic needle.

Really confused.

Song Qingyuan bent his index finger and tapped his forehead.

As soon as Da Lantai looked up, he saw such a scene. He thought it was Song Qingyuan who had been busy making a compass for the past few days and didn't have a good rest. He had a headache, so he hurriedly asked, "What's wrong, Your Highness? But I have a headache? Do you want to call Dr. Zhou?" Come?"

Song Qingyuan was stunned by his barrage of questions for a few seconds before he could react. He shook his head and said, "I'm fine, I'm just distracted thinking about things."

After finishing speaking, Song Qingyuan got up and walked out, and said, "I'm going to visit the craftsman who made the compass in the side hall. Do you want to go there together?"

Da Lantai nodded and followed quickly.

Along the way, Dalantai was still a little worried about Song Qingyuan's body, and secretly looked at Song Qingyuan's thin back with worried eyes from time to time.

Feeling the gaze cast from behind him from time to time, Song Qingyuan called Dalantai to his side helplessly, and explained: "Just now I was just thinking about how to make an artificial magnet, and there is really nothing wrong with my body."

Dalantai saw that Song Qingyuan's expression did not seem to be fake, it seemed that he really didn't have a headache.

His heart finally fell to the ground, and only then did he notice the meaning of Song Qingyuan's words just now, and hurriedly asked: "Your Highness, do you mean that magnets can also be made artificially?"

The magnets he has seen are all natural ores. Although they are not as expensive as jade and emeralds, they are not common. He has heard that magnets can be man-made.

Seeing that Dalantai finally no longer cared about his physical condition, Song Qingyuan breathed a sigh of relief, nodded and said, "Of course it's possible."

"As for how to make it, you will know later."

Song Qingyuan had already answered the question he wanted to ask, so Dalantai stopped talking and followed Song Qingyuan silently to the side hall where the compass was made.

"Your Highness, you are here!"

As soon as he entered the palace gate, a 30-year-old craftsman ran out of the house and reported to Song Qingyuan the work progress of the past few days.

The first three compasses were sent out, but they didn't stop there, but continued to make them.

After all, anyone can use these things when they go out, so it is not a bad thing to have more.

"Go and get some magnets with the strongest magnetism, as well as thin iron sheets and a few iron needles." Song Qingyuan ordered to the people beside him.

Although he didn't know what these things could be used for, but out of respect for Song Qingyuan's identity, the craftsman brought what he needed without asking any extra words.

Song Qingyuan knew that compared to his hands-on ability, he must not be as good as these professional craftsmen, so he didn't do it himself, but told the craftsmen the method and let them do it for him.

There are mainly two kinds of artificial magnetization methods suitable for this era.

One is to use the principle of geomagnetic induction to cut a thin iron sheet into a fish-like shape with a length of two inches and a sharp head and tail.Then burn it red with fire, and put it into the water with the head of the fish facing south and the tail of the fish facing north.

This step utilizes the earth's magnetic field to align the iron molecules inside the iron fish along the direction of the earth's magnetic field, thereby achieving the purpose of magnetization.

Putting it into water is to speed up the cooling speed of the iron sheet and accelerate the arrangement of fixed internal iron molecules.

When putting the iron fish into the water, there is another trick, that is, when the fish is submerged in the water, the tail part of the fish is slightly inclined downward, which can deepen the magnetic force of the iron fish.

After this process is over, the iron fish becomes a "magnetic fish" that can point out the direction.

The second method is the kind that often appears in interesting experiments in later generations, using a magnet to polish the iron needle, that is, the friction magnetic transmission method.

In Song Qingyuan's previous life, he also saw a project manager in his company take his daughter to do this experiment.

Song Qingyuan asked the craftsmen to try these two methods.

But I don't know whether it is the original Nan`feng cause of the iron sheet itself, or which step is wrong. The former method, whether it is trimming the iron sheet or quenching and cooling, took a lot of effort, but the magnetic fish produced is not as good as it is. The latter has a good effect after simply grinding the iron needle.

In the end, Song Qingyuan decided to make a compass using the method of frictional magnetic transmission.

After all, this method is not only simple and easy to operate, but also saves time and is most suitable for large-scale promotion.

Although this method also has a certain risk of degaussing, it is the best and most suitable method for the people of Mobei before the appearance of the electromagnet.

It's a big deal to have a few more when you go out.

After confirming that this method was feasible, Song Qingyuan turned his head to Dalantai and asked, "Did you just see clearly the process of making magnetic needles?"

Dalantai was still immersed in the shock of Song Qingyuan's magic, allowing an ordinary iron needle to point the direction.

Hearing this, he murmured first, "It's unbelievable to be able to indicate north and south by rubbing against a magnet for a while," and then hurriedly replied: "I see clearly, I see clearly."

Song Qingyuan nodded, and ordered without further explanation: "Now that you have seen it clearly, write down this method and send it to the leader of Amur, and ask him to process the compass and tell the caravan how to use it."

However, Muhe Tribe doesn't seem to have so many magnets with great magnetism.

Thinking of this, Song Qingyuan added: "Remember to pick and send one of the most magnetic magnets here."

After all, the quality of the magnet will greatly affect the quality of the magnetic needle produced. Of course, the magnet with the strongest magnetic force should be selected.

Speaking of Muhe Tribe, Song Qingyuan remembered that just a few days ago, Du Wei had shipped a batch of bean products from him to be sold in the south.

He travels around all the year round, so he also needs a compass very much.

Song Qingyuan called the craftsman who was still thinking about artificial magnetization, and asked, "Is there a compass that has already been made in the warehouse?"

The craftsman who was called over hurriedly said: "Your Highness is talking about the kind inlaid with water jade?"

Seeing Song Qingyuan nod, the craftsman responded immediately: "Yes, the craftsmen have just made a few. Your Highness wants to use it? I'll send someone to pick up the little ones."

Song Qingyuan signaled him to go to Curry to get two out, then turned around and told Da Lantai: "By the way, you also send two to Chief Amur and Du Wei, they probably need them on weekdays."

Song Qingyuan has always been generous to his confidantes. Although Du Wei is just a merchant, he is generous and generous, and has helped them a lot.

Whether it was running around for the introduction of tea trees before, or later taking the risk of helping the spies to send them news about Emperor Hongde's serious illness, Song Qingyuan valued him quite a lot.

The person he values ​​is nothing more than an expensive compass, no matter how expensive he is, he can afford to give it away.

Once he's done with the compass, he's left with the day-to-day chores.

Song Qingyuan, who had nothing to do, naturally rejected the proposal of his servants to carry him back to the palace in a sedan chair.

Now is the season of singing birds and fragrant flowers. Although Liandi's palace is half old, the scenery in the palace is not bad.

Song Qingyuan walked towards his palace at a leisurely pace while listening to the crisp birdsong from the garden from time to time.

Although Dalantai was very curious about the technology of artificial magnetization, because Song Qingyuan had ordered him to do a lot of things, he didn't stay in the side hall, but followed Song Qingyuan to get the letter for Amur, and waited until tomorrow. send out.

Along the way, he just followed Song Qingyuan without saying a word, until the magnificent palace gate appeared in front of him, as if struggling for a long time, he whispered: "Your Highness, may I have the courage to ask you a question?"

He wanted to ask this question since he first met Song Qingyuan, and he kept it in his heart, not to mention how uncomfortable it was.

Seeing his complex expression, Song Qingyuan didn't know what he wanted to ask for a moment, so he nodded and said, "What's the problem?"

Da Lantai pointed at the patterns in his palace, and spoke quickly: "Your Highness, who carved the totem patterns on the eaves wall of your palace?"

So fast that it seemed that he was afraid that he could hear clearly.

Song Qingyuan shook his head in bewilderment.

Isn't this the pattern used for ordinary decoration?Is there anything else to pay attention to?

The author says:

Lian Ti, who is far away in the Southern Zhou Dynasty: I don't know why there is a chill behind my back.