Great Tang princess

In fact, the art troupe in the army has indeed been formed, but almost all the work is handed over to Zhang Yizhi.

After all, Li Yuechen doesn't know much about music, and he can't play musical instruments, so he hardly comes here. He just asks him to recruit people, and he can also see if there are any talents in the army. In the future, some celebrations will be held Can also come in handy.

Although the princess is not very interested in this place, after all, this is a military camp lacking in entertainment, and other people are naturally more interested, and among them, children are the most important.

A group of royal children would forget to run here every day after class, come to watch his performances, and occasionally ask some questions about rhythm.

Although Zhang Yizhi is best at wind instruments such as dongxiao and shakuhachi, he is not good at playing other percussion instruments such as Jiegu and plucked string instruments such as pipa, but he is not that proficient.

The royal family itself has strong artistic cells, except for Li Yuechen, so Zhang Yizhi has basically become their personal tutor recently.

He also knows that if he can build a good relationship with these children, it will be of great benefit to his future, so he is extremely serious when teaching, and he has also discovered many talented children.

Let's not talk about collateral lineages, let's say that among the direct descendants of the sage, Li Longji, the king of Linzi, has the most talent in this area, and he is very good at playing Jiegu.

If there is any problem, as long as you explain it carefully, you can basically memorize it completely, and you will not repeat it.

After a period of study, I have even started to create my own music. Every day after class, I sit cross-legged on the ground, place the jiegu between my legs, and beat rhythmically.

However, Li Chengqi and Li Chengyi, who were obviously the eldest brothers, sat around him like little followers, one playing the dongxiao and the other playing the shakuhachi, thinking about the ensemble together with him.

As for Li Longfan and Li Longye, who were originally younger brothers, they can only observe and study with their elder brothers now.

But at least it can be seen from here that the artistic cells in the blood of the royal family seem to have a certain degree of inheritance.

Li Yuechen didn't care too much about their after-school entertainment. Children are children after all, and it's hard work to be busy with heavy schoolwork on weekdays. It would be great to have some entertainment in their spare time, at least to a certain extent. Mental and physical health.

To put it bluntly, playing an instrument is better than knowing at a young age to focus on women.

Of course, the school curriculum also includes knowledge about men's and women's physical hygiene, mainly to tell them that they are fine and don't mess around, and they will think about that when they are older.

The reason why Li Yuechen did this is also to gradually raise the age of marriage and childbearing after the social development stabilizes in the future.

In this day and age, giving birth to a woman is no less than going through the gates of hell. In addition to the problem of backward medical system, giving birth too early is also a problem.

There are also many girls who get married and have children at the age of thirteen or fourteen. It is very dangerous to have children at this age before they are fully developed.

Therefore, Li Yuechen's idea is to wait for the country to continue to stabilize, raise the age of marriage and childbearing to men, and consider the issue of marriage and childbirth after women are 16 years old.

In addition, if the incubator can be successfully manufactured by then, the survival rate of newborns will be greatly improved, and the country's population will increase faster.

……

It was the end of September in a blink of an eye, and the weather was getting colder and colder. Many families in the nearby fishing villages had already lit the kangs early and started to prepare for the winter.

In the barracks, the fireplace hasn't been lit yet. They are all in relatively good health, and they don't feel too cold now.

However, Qingdao is close to the sea after all, and the climate here is very humid. Once the weather cools down, it will feel a bit cold. Many fishermen living nearby suffer from arthritis and other diseases.

This kind of phenomenon made Li Yuechen more determined to establish a physiotherapy system. With the development of science and technology, even if some diseases cannot be completely cured, it is good to at least relieve the pain of patients.

Another piece of good news is that after a period of continuous experimentation, the world's first optical lens was finally created.

The polishing of the silver-plated copper plate has also been done to the extreme. After seeing it, Li Yuechen felt that the time was ripe and he could formally start the camera experiment.

The next day, in the small courtyard of the engineering institute, the assembled camera was already placed in the courtyard, facing the distant mountains.

There is no wind today, and the trees on the mountain are all still, which can be used for shooting experiments.

It is said to be a camera, but it is actually a square wooden box, much larger than future cameras, enough to fit a grown man's head.

After choosing the angle, the door of the next room opened, and the academician inside handed over the cassette with both hands very respectfully.

The polished silver-plated copper plate has been steamed with iodine solution, and all the preliminary preparations have been made.

Li Yuechen inserted the camera obscura into it with his own hands, covered his head and the camera camera obscura with a piece of black cloth, and gently adjusted the angle of the camera camera obscura with both hands.

Because this lens does not have the function of adjusting the focal length, it is the only way to find the clearest angle.

After a few adjustments, the angle was determined, and the front panel of the camera obscura was opened to start the exposure process.

It is worth mentioning that in the scene Li Yuechen saw, the picture was upside down, but it didn't matter, and it would not affect the final effect of the photo.

Seeing that Li Yuechen finally moved his head away from the black cloth, the academician at the side asked, "Your Highness, this..."

"Okay, just wait!" Li Yuechen waved his hand, walked to the chair next to him, sat down and waited.

As I said before, no one is allowed to move around in the fan-shaped area in front of the camera, so at this moment the academicians are all around to observe.

According to what His Highness said, this thing can preserve the scene in front of you, presumably it should be an automatic drawing machine?

Li Yuechen kept the time in his heart, hoping that this advanced lens could compress the exposure time to less than five minutes.

The craftsmen didn't ask too much, but discussed in a low voice whether the machine painted better or the human painting was better.

Everyone waited quietly, wanting to see what kind of miracle the princess could bring this time.

Holding the teacup, Li Yuechen recorded the time in his mind. After guessing that it was almost time, he closed the camera obscura, took out the camera obscura, and entered the room.

Take out the copper plate that has been exposed inside, put it upside down on the prepared shelf, and start heating the mercury below, so that the mercury vapor adheres to the copper plate.

In order to ensure safety in this step, the device containing the mercury below is closed, and everyone is required to wear a gas mask.

Of course, this so-called gas mask is full of loopholes by the standards of the future.

In fact, cowhide is made into a hard mask in the shape of an N95, and then a few protruding tubes are inserted on it. The tubes are filled with smashed bamboo charcoal, which is a simple filtering device.

It's actually a bit difficult to breathe while wearing this thing, but anyway, I won't wear it for too long, it's better than being poisoned.

After igniting the alcohol lamp under the mercury container, Li Yuechen announced that everyone would leave the room and wait, and then took off their masks.

About a quarter of an hour later, it was announced that everyone would open the door of the house and the surrounding windows, and after dissipating the mercury vapor inside, they put on masks and entered it again.

Turning over the copper plate on the shelf, Li Yuechen, who had been looking forward to it, finally breathed a sigh of relief.

The captured scene is completely and accurately presented on the copper plate, but it seems that the image is not particularly obvious so far.

The craftsmen outside the door could only see her back, and they didn't know what the effect would be. They stood at the door and looked in curiously.

Li Yuechen didn't dare to waste time, so he quickly put the copper plate on another bracket and washed it with heated salt water.

With the washing of salt water, the image on the copper plate gradually became clear, and all the details were vivid, even comparable to the black and white photos of the 80s.

After rinsing, an alcohol lamp was lit underneath to heat the copper plate, and at the same time, without looking back, he directed the craftsmen to bring the prepared glass frame and isinglass.

Because this image is too fragile, in order to preserve it for a long time, Li Yuechen ordered the craftsman to make a glass frame in advance, sandwiched the taken copper plate photo between two pieces of glass, and sealed it with fish glue.

Without exposure to air, these photos should be able to survive for more than a thousand years.

Li Yuechen finished all the procedures by himself, then heaved a sigh of relief, turned his head and said: "Until the fish glue is completely dry, no one can move! Do you understand?"

In fact, isinglass is really strong, but the only drawback is that it dries slowly and takes several days.

After all the craftsmen agreed, she waved her hand lightly: "Okay, come and have a look, just watch, don't do anything!"

After hearing the princess's permission, the craftsmen came together and leaned over to look at the photos on the table.

Wang Wuqiong was also a little curious, but he took two steps back, intending to wait for them to finish watching before going to look at it himself, but the next moment, he heard all the craftsmen exclaiming in unison.

Even the craftsman at the front couldn't help taking a few steps back, still muttering, "A miracle! It's a miracle!"

Others behaved almost the same way, looking crazy, as if they had seen a ghost.

Out of curiosity, Wang Wuqiong also leaned over, intending to see how far this painting has gone.

However, looking at it this way, the sight can no longer be diverted, as if a pervert who has been imprisoned for many years sees a beautiful woman in a bikini, all attention is firmly attracted.

I saw a lush mountain peak displayed on the copper plate behind the glass, and because of the angle, the clouds floating on the top of the mountain were also clearly visible.

The corner of the shipyard at the foot of the mountain is also in the image, everything is clearly visible, except for the lack of color, there is no difference!

Whether it is the road at the foot of the mountain, the branches on the mountain, or the clouds on the top of the mountain, they are all so lifelike, it is hard to imagine that this is actually a painting!

What kind of ingenious technique must be used to draw such a powerful painting?

Seeing her surprised expression, Li Yuechen smiled with satisfaction. Anyway, the research and development of this camera was considered a success, and it was something to be happy about. Let them have a drink tonight.

After standing in front of the photo and observing for a long time, Wang Wuqiong raised his head with staring eyes, and said in a trembling voice: "Your Highness, this..."

"Well, do you understand now? This is not a painting, it's another kind of utensil..." Li Yuechen had an inscrutable smile on his face, highlighting his awesomeness.

People live to pretend to be aggressive. Although the identity of the princess is already very powerful, but occasionally pretending to be in front of her subordinates can make her feel more comfortable.

The other craftsmen looked speechless, wanting to flatter them, but found that they didn't even know where to start.

Seeing their anxious faces, Li Yuechen waved his hand: "Okay, there is no need to say anything redundant, I will tell you the specific method and usage of this thing again, and I can take more pictures recently. A few pictures to get used to..."

The craftsmen agreed in unison, and then lowered their heads again to observe the vivid photos in front of them, praising His Highness's abilities while looking at them.

After Wang Wuqiong recovered from the initial surprise, she still felt her heart beating violently. This kind of shock could not be recovered immediately.

Especially when seeing something beyond imagination, a variety of complex emotions are intertwined in the heart, and it is difficult to relax immediately.

But she still has doubts in her heart: "Your Highness, why is this photo..."

"Ah, left and right are reversed, right?" Li Yuechen knew her question, and shook his head helplessly: "I can't solve this problem at present, so I can only leave it to future generations to think about."

I know some of the principles behind it, but it's not complete, so Li Yuechen doesn't plan to solve it now.

The only troublesome thing to say is that if the camera is used to take pictures of people in the future, it is best not to take pictures of people's faces.

Because the left and right faces of most people in the world are not completely symmetrical, a frontal photo with the left and right turned upside down will look like another person.

But this is not a problem, as long as the photos can be preserved, later generations will invent computers, scan the pictures and turn them upside down.

What Li Yuechen has to do next is to thoroughly teach these craftsmen the principles and usage of the camera, and take some more photos at the same time, and then send them to his mother.

By the way, how can it be possible, Li Yuechen also wants to take a few more photos of his mother, so that her appearance can be passed on to future generations.

In any case, she will be the first emperor in history to leave a photo, which will be of great significance after a thousand years.

The advent of the camera represents that human beings can break the concept of time to some extent, allowing future generations to know the appearance of their ancestors and even their living environment.

It is of great significance to any discipline.