When you come, the stars and the moon are coming, and so is the time when you return.

Pressed for time.

After returning to Yingtian, there were still more than 20 days before the wedding, and the dusk was a little incredulous, under the traffic conditions of the 15th century, he actually ran more than 8,000 kilometers back and forth in more than a month.

It's incredible.

This trip is very costly.

The carriage and horse fees alone were a huge amount of money, and there were seven or eight dead and sick horses along the way, and the remaining horses were basically scrapped and could no longer gallop long distances.

The labor costs of the four coachmen and the expenses along the way, together, are also thousands of taels of silver.

And the result is just ten magnets.

Investment and output do not seem to be proportional, but this is the fifteenth century, and with this magnet, the subsequent benefits to oneself are definitely not measurable by a few thousand taels of silver.

After returning home, let Qian Feng go to Xu's Mansion to report his safety.

Dusk didn't go.

He still has something to do, rest for a day.

Early in the morning of the second day, I went to find Lao Li in Zhongshan's factory and inspected the results of his work.

Perfectly finished.

Except for the remaining ten catties of copper at dusk, the remaining two hundred and eighty catties of copper were all poured into copper wires and fused together, almost about 450 meters of copper wires.

Enough!

It is not enough to have copper wire, but also need to get insulating materials, if there is no insulating material to wrap it, the effect and quality will be very poor, and there will be potential safety hazards.

There are two options that can be used for insulators.

ceramics and lacquer.

Lacquer has been available since ancient times, and the Ming Dynasty also has it, but it is expensive, but it can still be bought.

Ceramics can be customized.

Dusk intends to do both.

asked Xu Yin to go to the market to buy lacquer, and at dusk went to the ceramic kiln where the exquisite small porcelain vase was customized, found the owner, and made a request, hoping that the other party could complete his order.

The other party heard Dusk's request, very headache, this style of porcelain has not been done before, need to try a few more times, said, "The porcelain tube you request, the length is too long to pull the embryo, if we want to do it, we can only do our best to pull out the length within the ability of the ability, and then it will be no longer possible, so we need to try many times." ”

Dusk thought about it and said that there is no need to try, just do what I said, make a large number of finished products, and burn them out in a kiln, even if there is one out of ten, it is okay.

When the owner of the kiln heard this, he silently calculated in his heart, "According to one out of ten, I am afraid that hundreds of samples will have to be made to meet the requirements you need, and the cost is very high." ”

Twilight laughed and said, "I won't let you suffer." ”

The proprietor hesitated, "Okay, you can try it, but the ugly words are in front, if the last one is not successful, you still have to pay for this money, and you can't let my workers work for nothing." ”

Dusk nodded, "It's nature." ”

He added: "But I still have a request, I hope these porcelain tubes will be glazed inside and out." ”

The proprietor was puzzled, "The outer glaze is for good looks, and the inside is glazed for what?" ”

Dusk is also not easy to explain, vague.

The glaze inside is to not hurt the copper wire, no way, the copper wire is not easy to come by, and if the copper wire is injured, it will lead to safety accidents such as burning the wire, it is better to spend more money and do it at one time.

After paying the deposit, Dusk immediately went back to the city to prepare for other things.

Make planks.

Make the rollers.

Making all kinds of washers - also polished with wood chips and polished into a washer style, fortunately, the carpenter is highly skilled and it is not difficult to make.

A U-shaped frame is then made out of wooden planks.

Everything is ready.

At dusk, I went to buy all kinds of bamboo, found a carpenter, and cut the bamboo into a zigzag shape of earthworm thickness, like a winding mountain road, and after making a certain amount, I took it all to steam.

In the end, I sent someone to the Zhongshan factory to get back the spherical glass container, that is, the light bulb, that Lao Li blew out during this time.

Not to mention, Lao Li has a few brushes.

And it did.

But it's not much, it's only seven or eight, in Lao Li's words, don't underestimate these seven or eight, it took him several days and countless failures to come up with so few.

Let the carpenter accurately measure the size, make the plug of the bulb out of bamboo chips, ensure the tightness of the inside, and of course, paint it, so as to ensure that it is truly impermeable.

Put the wick made of bamboo as the material into the bulb, connect the copper wire, leave half of each pole for easy testing, and then start to build the experimental equipment.

The U-shaped frame is in place, the center of the drum is first opened, then the copper wire is wrapped, the rotor made of wood is passed through the U-shaped frame, then through a hole in the drum, a magnet is inserted, the hole is pierced, and another section of the drum is passed through and erected on the U-shaped frame.

Connect the left and right ends of the copper wire on the drum to the bulb.

Since then, a small generator has been formed.

Whether it can succeed or not, Dusk has no bottom in his heart.

Only keep experimenting.

Fortunately, there were enough materials to prepare, which was enough for him to have several chances of failure.

……

……

Time passes.

The New Year is approaching, and the second half of the second year of Yongle seems to be about to pass without wind and rain.

The wedding date of dusk is also approaching.

Under the operation of Wu Pu and Wu Li, all the preparations for the wedding were carried out in an orderly manner, and the invitations were also dispersed, radiating the entire Nanzhen Fusi.

In addition, Gao Xianning, who lives near Guozijian, and Wang Zhen are also invited.

Zheng He, the official eunuch of Ouchi, and the eunuch Gou'er received the invitation.

Daoyan, an old monk from Jianchu Temple, was also invited.

Even Zhu Di and his wife received invitations.

There are more relatives on the Xu family's side, but they are also invited one by one, but most of the relatives over there stay in the Xu Mansion, and only a small number of relatives will come to see off their relatives, and they will have lunch here at dusk.

It seems that this is just an ordinary happy event.

However, with a negotiation between Queen Xu and Zhu Di, I don't know what happened, and news came out from Xu's mansion, saying that on the wedding day, Queen Xu would personally go out of the palace to send her sister off.

This news made the sensitive Ying Tianren suddenly feel unusual.

Queen Xu is going to leave the palace, so what about Zhu Di?

Previously, there were Zhang Dingbian's descendants who testified that Dusk was a person from the Ming Sect, and in the end, it was thunder and rain, and Zhu Di did not punish Dusk, and later even asked the ordnance supervisor to send 300 catties of copper to Dusk.

Copper is no ordinary thing.

It can be seen that Zhu Di's faith in dusk is serious.

So even Queen Xu has to come to the wedding at dusk, will Zhu Di also be out of the palace?

Quite possibly!

So Ying Tiancheng suddenly became nervous.

Zhu Di is not out of the Forbidden City, there are Jingying and Jinyi Wei and other emperors' pro-army guards, and no one can do anything about him, so there is the Shangyuan fire case, but now, Zhu Di is about to leave the palace, how can those old Jianwen ministers hidden in the dark night not be ready to move.

Everyone in the government and the opposition knows that with Zhu Di leaving the palace, I am afraid that this Yingtiancheng will be lively.

But think about it.

Will Zhu Di know?

Therefore, when leaving the palace this time, there will inevitably be a tight security guard, and there will be absolutely no accidents.

But......

Just in case!