The sun fell and handed Sun Yi a tin pot. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

The shape of this tin pot is quite similar to a purple clay pot, the workmanship is exquisite, carved with patterns, shining with silver light, and there is a seal on the bottom of the pot: "Suzhou Zhao Liangbi system".

Sun Yi took it and found that the tin pot was heavy, and when he opened the lid of the tin kettle, he saw that it was full of copper coins.

Sun Yi thanked the sunset, asked Wang Erniu for the location, and walked towards the newly built sewing needle workshop in the camp with a tin pot.

The tin pot and copper coins were all asked for by Sun Yi.

And Sun Yi wanted these two things because Sun Yi suddenly had a wild idea last night - to have electricity!

Before going to bed last night, Sun Yi plugged in the power bank to charge his mobile phone as usual. Judging from the power displayed on the small LCD screen on the power bank, Sun Yi estimated that this was the last time to charge the mobile phone.

That is, in three or two days, Sun Yi will lose his database.

Without the database, Sun Yizhen has no confidence to mix in the Ming Dynasty!

What's even more tragic is that in the next short period of time, all of Sun Yi's electronic devices will be reduced to garbage one after another because of the lack of power.

Count the electrical appliances he brought from later generations, including mobile phones, flashlights, two walkie-talkies, a shortwave radio, an altimeter used by the Ming Dynasty to report more, and a power bank.

So, there must be electricity!

This morning, the phone was fully charged, and Sun Yi glanced at the remaining power of the power bank, and only 5% was left.

There are no ready-made routines about electricity in the novel for Sun Yi to learn from, and Sun Yi can only figure it out by himself.

Lai Sun Yi is also half a "ham".

"Ham" is a black word in the circle, referring to radio amateurs. Radio amateurs are divided into technical and sporty types, the technical type is keen to study equipment and technology, and the sports type is keen to set up a remote radio station on a desert island and wild mountain. Sun Yi's half of the "ham" belongs to the latter. Sun Yi had almost forgotten the content of the e-courses in high school and college.

However, Sun Yi has a mobile phone, and Sun Yi is determined to learn from scratch and get the electricity out before the next time the mobile phone runs out of power!

Sun Yi really couldn't help the Ming Dynasty in steelmaking, artillery, machinery, and textiles.

But through the personal experience of these two days, Sun Yi has summed up: with his own crossing, there is no need for the Tiemu Battalion to follow the original development trajectory of history.

For example, Sun Yi's greatest help to the people of the Ming Dynasty in the past two days was the knowledge that only appeared after the industrial revolution in the original history - the common medical and health and chemical knowledge of later generations.

This shows that the Ironwood Battalion can develop by leaps and bounds!

The steel will not be refined for a while and a half, so it will not be refined!

Straight into the electric age!

And Sun Yi is confident.

The fruit battery introduced in the popular science program in later generations is just to find two metal pieces into the tomato, what is the difficulty?

The copper coin in the tin pot in Sun Yi's hand is a kind of metal sheet prepared by Sun Yi; Another piece of metal that Sun Yi prepared was a tin pot containing copper coins.

On the morning of the first day back in the Ming Dynasty, when the people worshiped Sun Yi, Sun Yi noticed that when the sun fell and he offered tea to himself, he was carrying a silver-white metal teapot, and Sun Yi concluded that it was a tin pot.

Sun Yi judged this because he knew that in ancient China, there could be neither aluminum foil nor iron sheet.

In ancient China, due to the quality of iron ore, iron smelting technology took two different paths from the West.

China's iron ore has too high a sulfur content to be forged, only for casting. Therefore, ancient China had an unparalleled casting technology, and oxen could cast iron pots. Sun Yi couldn't understand how much of a large and thin iron pot could be poured out with molten iron, which required how precise the mold of the pot was!

The West in the same period, due to the good quality of iron ore, took the path of forging. If a Westerner were to make an iron pot, it would be very simple and laborious to hammer the iron into a thin sheet and then make a concave surface.

So the Chinese pot is a big, deep and cheap round bottom, while the Western pot can only be a small, shallow and expensive flat bottom.

But in terms of material, a pan is stronger than a cast iron pan. Although it is troublesome to calcine, the performance of iron is continuously improved by striking again and again, and finally it can be "refined into steel". Although cast iron is trouble-free, the finished product is still brittle and hard, and a single stone can be smashed into several petals.

Most of the best raw materials used to make weapons in ancient China were imported from the Western Regions. The Song and Yuan dynasties called it "Coastal Railway", and even set up a special "Coastal Railway Bureau" to manage this matter.

The different development paths of iron smelting in China and the West caused ancient China to lag behind the West in terms of calcination and heat treatment technology. So much so that Damascus knives, Japanese knives, and even Miao knives were of better quality than those of the Central Plains, so much so that Sun Yi doubted whether there was a real "steel" in the sense of later generations in ancient China, so that there had never been such a product as iron sheet in ancient China, so that the unique tin pot of the Ming Dynasty prevailed.

However, the tin skin is also a metal skin, and it can be used as a battery.

Following the clanging sound of iron, Sun Yi quickly found a sewing needle workshop.

This workshop was only yesterday when Wang Erniu sent someone to build the furnace, and this morning the two blacksmiths started work.

Around the stove, one master blacksmith is holding a red-hot piece of iron, and the other is wielding a heavy hammer, and the two work together, and each time the sledgehammer falls, the red piece of iron changes position.

The master who was clamping the iron smiled at Sun Yi innocently, and said something in his mouth, but the work in his hand did not stop at all.

Sun Yi said: "You are busy, leave me alone." ”

The voice was also torn apart by the clanging of iron, and it was not really audible.

Sun Yi found a box and sat down.

The temperature of the stove, the summer morning sun, the monotonous sound of sledgehammers and pieces of iron, and the hum of the chopping board after the impact, made Sun Yi feel as if he was a tourist visiting a folk village.

On one side of the blacksmith's stove is a freshly made wooden bellows with several iron bars the thickness of chopsticks scattered across it.

There is a saying that "as long as the effort is deep, the iron pestle is sharpened into an embroidery needle".

However, Sun Yi never believed that these iron bars were used to sharpen needles.

Each time the reddened iron was struck, a few sparks erupted. When you squint, each spark turns into a line, and the color of the iron on the cutting board is less harsh. The iron gradually thinned and darkened under the blow.

The two masters in front of them are using the method of calcination to improve the properties of iron little by little.

The iron on the cutting board cooled down, and the two masters withdrew their hands, and then officially greeted the master: "Has the master eaten?" ”

Sun Yi had already adapted to this greeting, and asked directly: "Are you preparing the iron material for making needles?" ”

The hammer-wielding master nodded and replied, "Yes!" The original iron material is too brittle, and it will break when it is pulled, so it can only be beaten out of some soft iron and then drawn. ”

Following the master's gaze, there were indeed a few broken iron bars on the ground.