Harry Potter Morning Light

On the banks of the Scheldt in northeastern France, there is a small town called Cambrai, c-a-m-b-r-a-i, not c-a-m-b-r-a-y. It was the battlefield between Britain and Germany during the First World War. At that time, both Britain and Germany put a large number of tanks into the battle. , and there are planes flying by at low altitude.

I don’t know if the people who fantasized about flying like birds and inventing various aircrafts thought that such a day would happen. According to Leonardo da Vinci’s early dissection of bird wings, and his According to the results of the research on the structure of bird feathers, the wings of birds are covered with thick tendon nets. Such a strong force allows them to far exceed the force used to spread their wings and fly, which can be used to catch prey or evade pursuit. The flight speed is increased by more than two or three times.

However, when the bird hovers in the air, its wings do not flap. Instead, it uses its wings to maintain balance. When the eagle wants to catch a hare on the ground, it will retract its wings to increase the speed of the dive. When it is close to the target or close to the ground, it will open Spread your wings and catch the rabbit with your sharp claws.

Another animal, the bat, can also fly. It needs to flap its wings frequently to fly, but the bat's flight height is far lower than that of a bird. When it flies to a certain height, it will stop flapping its wings and open its periosteum-only wings to glide.

The feathers of birds are soft and flexible, and it is wind-permeable, while the wings of bats are completely airtight.

However, if you look closely, agile flying birds such as hummingbirds have almost no tails, and bats also have no tails, because the nocturnal creatures they prey always try to escape pursuit by chaotic rotations. Bats must sometimes fly upside down and sometimes sideways. Use a variety of flying methods to deal with it.

Birds usually fly in a spiral or curve, and if bats' wings had the same structure as the air-penetrating feathers, that flight would kill them.

Wind power is an important element in the flight movement of birds. When a bird is in the wind, it can hover in the air even if its wings do not move. The moving air lifts the bird up. When the wind stops, the bird lifts itself by flapping its wings.

When the wind blowing over the mountain becomes heavy and fast, the birds will follow the wind when it changes from a slow wind to a high wind. When the wind away from the mountain becomes gentle and gentle, like water in a narrow river flowing into the sea, the birds After discovering that their own power can control the wind, the birds will become sky dancers again, completing various stunts in the air that amaze people standing on the ground.

In fact, a ship floating on the sea also has something in common with the flight of a bird, and the sail also borrows the wind. According to Leonardo's narration: I seem to be destined to talk about flying kites, because in my earliest childhood memories, it seems that a kite flew to me in the cradle, pried open my mouth with its tail, and Slapped several times in my mouth.

This may be Da Vinci's dream, or his hallucinations. In short, when many Italian boys boarded merchant ships to trade in the Mediterranean, Da Vinci chose a different path to become an artist.

The iris is the symbol of the king of France. Because each petal of this flower is shaped like an iris or a butterfly, many people are fascinated by its romantic and feminine posture.

The so-called dark blue hall (mazarine) in the Richelieu library does not mean that this hall is decorated with dark blue like Ravenclaw's lounge.

After Richelieu, Cardinal Mazarin became the prime minister of France. Mazarin, like other politicians, also invested in the construction of a library. Next to the French Academy is the Mazarin Library.

In the past, the Richelieu Library was the royal library. Mazarin once made great contributions to Louis XIV, but he died "properly" two years after Louis XIV came to power, and the mazarin hall and corridor became The mazarine hall and corridor, the two words mazarine and mazarin have similar pronunciations and only one e expresses completely different meanings. In this way, it is appropriate to express Louis XIV's respect for this hard-working minister.

The nobles in the Middle Ages called themselves "blue blood". They were proud of rolling up their sleeves and seeing the clearly visible blue blood vessels on their snow-white forearms. After the library is built, the manuscripts must be put in. As the main sponsor of the library, the sponsor has his own salon here, where he can hold banquets to entertain scholars, chat with them, and discuss academics. In addition, there are many tableware here , dinner parties can be held.

Severus followed Eiger to a rectangular hall at the end of the dark blue hall. Next door to this hall is the oval hall. There is a door in this hall that allows you to go to the bookshelf on the third floor of the oval hall without sharing it with other readers. An entrance, usually closed, will only be opened when "special guests" come.

There are many things that can’t be bought just by having money, but also need connections. The manuscripts obtained by privately-operated collection booksellers are either unknown or the asking price is too high, relying on the little funds allocated by the government Where can I afford it.

A good library should not only have a beautiful building, but more importantly, its collection. If the manuscript of the Declaration of Independence in Severus' hands is genuine, a library in a small place is the treasure of the town, even if it is The National Library of France is not an ordinary collection, especially after the new library has moved a large number of manuscripts and collections from the old library, the Richelieu branch library needs to replenish fresh "blood" to restore its vitality.

At this moment, he and Eiger stood on the top floor of the oval hall overlooking the library. It was close to closing time, and the readers left one after another. The entire hall was empty, without the bustle of the day.

In the past, in order to expand the central library, two floors were dug down in 1930. At that time, people were still worried that something would be dug, but nothing happened afterwards. Therefore, the rumor that there is a secret room in the basement of the library and that there are monsters hidden in it is regarded as nonsense.

Napoleon must have been dead when the Oval Hall was built. As for which reading room of the library he used to read while warming himself by the fire when he had no money or power, it seems to be an eternal mystery.

"What do you think?" Egger asked Severus with a smile.

"Impressive." Severus said, looking at the bronze city plaques on the Oval Hall, which were too far away even from the top floor.

"Do you want to go upstairs?" Eiger asked, "I can also ask the maintenance personnel to take you up for a visit."

Severus didn't make a sound. Each of these bronze medals corresponds to a circular ventilation window, and each ventilation window is between two pillars, and there is something like a fire hydrant next to the pillars.

"What's that for?" Severus asked, pointing to the "hydrants".

"That's a vent, it's used for heating," Eiger said.

"There was a monster's voice coming from inside?" Severus asked deliberately.

"I'll let you know if I hear it." Eiger said with a smile.

Severus patted the railing "I want to go around by myself."

"Of course." Egger said, but kept looking at Severus.

Severus handed her the manuscript of the Declaration of Independence, which was protected by a clear plywood.

"Thank you, we will return it to you soon after the inspection." Eiger said with a smile, took the manuscript, and left without hesitation.

Severus took his wand out of his sleeve after watching her disappear.

"Reveal your secrets."

He muttered softly, and then a puff of white smoke spewed from the end of the wand, spreading across the hall.

The hall can no longer be found, and it was demolished during the renovation in 2017.