The Magical Principles of Natural Philosophy at Hogwarts

Erwin was taken aback by Hermione's sudden outburst of enthusiasm.

The little girl didn't have many friends at school before, and now she suddenly found that Erwin and her have a similar one-in-a-kind magical talent, as if some endangered animal suddenly found its kind, and the excitement was beyond words.

She had a lot to talk about, and from the next morning Erwin seemed to have dozens of birds chirping in his ears, and Hermione didn't calm down until they sat in the back seat of Mr. Granger's car.

"Will we have an entrance exam when we enter that wizarding school? I got six perfect marks at the end of elementary school, but I'm not sure I'll be able to keep excelling in magic studies." Hermione looked distressed, " If there is an exam, it will be troublesome, we can only buy the textbooks today, and there is only less than 20 days of preview time..."

"Don't worry too much dear," Mrs. Granger stroked her daughter's thick curly hair, "They can't possibly test something that you don't know."

"That's not necessarily the case, Erwin, we have to work hard..."

Erwin turned his head expressionlessly, "Miss Granger, I have a few questions. First, do you know the difference between a definite integral and an indefinite integral?"

Hermione froze.

"Can't answer it? Then let me change the question, how are neutrinos produced?"

"..."

"Still don't know?" Erwin sighed helplessly. "The last question," he looked over with expectant eyes, "can you tell who first proposed the thermodynamic concept of entropy?"

It was still an embarrassing silence, Hermione bit her lip, her enthusiasm was completely extinguished by these three basins of cold water.

"Okay," Erwin shrugged. "These are relatively basic questions. I thought there would be someone who could really discuss the issues with me. It seems that I was thinking too much."

Miss Nutria was completely quiet now.

Erwin turned his head away, trying to suppress the twisted smile on the corner of his mouth, while Mr. Granger had already started laughing, and then Mrs. Granger gave him a light nod on the head reproachfully.

"Concentrate on driving."

Professor Stuart also had a somewhat helpless expression, "Where are we going?" He asked his son-in-law.

"Daxingang Street, I marked it on the map, um, yes, that's where it is."

An hour later, they arrived at the marked spot.

"That Professor McGonagall gave me a badge, saying that if I hold it in my hand, I can see the Leaky Cauldron." Mr. Granger glanced around. "It should be there."

He pointed to the only narrow facade on the street without a signboard, which was out of tune with the surrounding environment, but no one passing by noticed it.

"Muggle shielding spell." Erwin muttered in a low voice.

Mr. Granger pushed open the door cautiously, and a turbid breath came over his face, making Erwin frown.

Dark and messy, this is Erwin's first impression of this bar. It seems that wizards are not very particular about environmental hygiene.

Although it was in the morning, the bar was almost full. Most of the customers were elderly people, and the clothes were more old-fashioned than themselves.Erwin and his party seemed very out of place.

Just when Mr. Granger was at a loss, a witch sitting near the door stood up. She looked about six to seventy years old, wearing a neat and thick dark green robe, and a pointed hat of the same color.

Erwin knew immediately who she was, the only one in the bar who looked like a professor.

"Good morning, Mr. Granger." The witch's gaze swept over Hermione and landed on Erwin and Professor Stuart. "I should have told you before that there is a limit to the number of people entering Diagon Alley."

"The kid happened to have received the admission notice, so I brought him here." Mr. Granger said hastily, and Erwin took out his own letter and handed it over.

Professor McGonagall did not open the envelope, but took out his wand and tapped it lightly, and the Hogwarts on the envelope emitted a slight red light.

Pretty good way to verify counterfeit.

"There is no problem with the temporary admission notice." Professor McGonagall nodded slightly, "Professor Flitwick was supposed to guide you, but there is no need to bother him now, welcome to Hogwarts, Al Ving Frost."

She turned around, "I'll take you to Diagon Alley now, where you can buy everything on the list."

From Professor McGonagall's words, Erwin can roughly draw a conclusion that guiding Muggle children to school preparation seems to be one of the main tasks of the Hogwarts staff.After all, there are only less than [-] Muggle students each year, and the workload among several professors is not too great.

After saying hello to the gloomy bar owner, Mag led them through the bar to the backyard, and pointed at the masonry wall with his wand.

As the Grangers exclaimed, the masonry that made up the wall began to turn, forming an arched passage in a few seconds.

Through the passage, they came to Diagon Alley.

The door of the nearest store faced stacks of cauldrons, and to the right was a large window displaying several brooms.

"I'll take you to Gringotts first, where you can exchange wizard coins. The merchants on this street don't accept pounds."

As they walked through Diagon Alley, Hermione was looking around excitedly. She had recovered from the shock and asked Professor McGonagall a lot of questions, while Erwin kept quiet and observed silently.

This alley is at most 200 meters long, and there are no more than [-] businesses including roadside stalls, and there is basically only one store of each type.

This can only be described as a small market.

"Professor McGonagall," Erwin said, "how many places like Diagon Alley are there in London?"

The witch gave him a surprised look, "Only this one, Diagon Alley is the most important trading place for wizards in England."

Can such a place satisfy most trading needs?Erwin thought about it, which might mean that the UK's overall wizarding population is less than five figures.

Gringotts is a huge white stone building in the innermost part of Diagon Alley, and after entering the brass gate, Erwin found that it was actually an old-fashioned bank, but all the clerks were short, Humanoids with exaggerated noses and ears.

"These are... goblins?" Erwin took a deep breath, and he realized that he had made a mistake in estimating the number of wizards in the whole of Britain just now, and not all of them were "people" that made up the wizard population.

"They are goblins." Professor McGonagall corrected: "A creature with advanced intelligence, possessing magical abilities no less than human wizards, and goblins are just similar in appearance to goblins, but much more stupid."

"Then why don't we go to a bank run by a human wizard?" Hermione asked casually.

"Because Gringotts is the only bank approved by the Ministry of Magic, young girl." It was not Professor McGonagall who answered, but a goblin approaching with a sly gleam in his eyes.

"Uh, I'm sorry...I'm not..." Hermione blushed slightly and spoke incoherently, the little girl thought she had offended her.

The goblin turned around and greeted Professor McGonagall, "Is there anything I can do for you, ma'am?"

"Exchange some Galleons for these two children."

"Then please come with me."

The goblin led them to a counter in a corner and then went to greet other customers, "This is Clerk No. 47 Gasly," the goblin on the counter spoke at an alarming rate, "The ratio of pounds to Galleons is five to one , we also provide transfer service if needed.”

"Buy everything on the list and count the possible school expenses for this year, 150 Galleons is more than enough," Professor McGonagall reminded.

The Grangers thought about it and exchanged it for [-] Galleons. They were both dentists and had their own clinics, so they were quite financially rich. Hermione was their only daughter, so naturally they would not be stingy.

After the goblin counted, he gave them a bag full of gold coins.

It was Erwin's turn, "Is there an upper limit for this exchange?" He asked directly.

The goblin clerk gave him a surprised look, "Of course, the upper limit is [-] Galleons."

"One year?"

"Seven years." The goblin chuckled, showing her yellow teeth.

"That's too little." Erwin frowned, "Why set an upper limit?"

The basic expenses mentioned by Professor McGonagall alone cost more than 1000 Galleons in seven years.

"Because this exchange ratio is simply giving you money." The goblin raised his nose mockingly, "If it wasn't for the request of the Ministry of Magic, Gringotts would not have provided such a purely welfare service at all. Muggle money is too valuable. Low, basically equal to waste paper."

Sure enough, this race, as in the legend, regards money and wealth as the top priority.

"Okay," Erwin sighed, he could understand, after all, ordinary people's productivity is too low compared to wizards, "Then I'll exchange it for three thousand Galleons."

"Are you sure? If you accidentally spend all your money in the past seven years, we won't exchange even one Nat for you. Then you will have to borrow money." The goblin smiled maliciously.

"Sure." Erwin didn't hesitate.

These amounts are meaningless if they are not exchanged. Erwin now needs enough gold coins as his starting capital in the wizarding world.

Under the surprised eyes of the Granger family, Professor Stewart opened the briefcase with a rather stiff expression, and took out a stack of thick banknotes. After all, he was the guardian in name, and he had to pay.

"The letter said to prepare enough money," Professor Stewart explained to his daughter with some embarrassment, "I brought some more for emergencies..."

Of course, I brought more than just "some". There was [-] pounds in the briefcase, but I didn't expect to be able to exchange half of it.

"Are you really going to let him take all the money to school at once?" Mrs. Granger was in disbelief.

"Of course not." Professor Stuart laughed, "Erwin is a sensible child, and he already has a sound sense of values ​​and money."

The poor old man, who had never told a few lies in his life, had to clumsily cover for Erwin.

Gasly, the goblin at the counter, rang the bell, and soon another came up pushing a cart with Erwin's gold coins on it.

After seeing this golden hill, Erwin realized that he had overlooked a problem, that is, galleons are physical currency, and each gold coin is very important.

Mr. Granger was already struggling to hold the bag containing [-] Galleons, and [-] Galleons was absolutely impossible for them to carry away with their bare hands, unless Erwin was willing to show it in front of a Hogwarts professor. I naturally know the "Standless and Silent Floating Curse".

Gasly on the counter smiled happily, "You can deposit this money in Gringotts immediately, and only need a [-]% annual storage fee."

"Custody fee?" Erwin thought he had heard it wrong, "I have to pay a storage fee for depositing money here?" He thought it was ridiculous.

It's really an extremely backward business model. Is this the consequence of financial monopoly?How incompetent were the people of the Ministry of Magic to allow the goblins to set up their only bank?This is almost equivalent to sending the leeks of the entire British wizarding world to cut for them!

But Erwin is just a freshman at Hogwarts now. No matter how much property the Frost family has, the support they can give him is only [-] Galleons. It is best for him to accept any form of exploitation obediently. Harmful look.

"If you don't save it, then I can't help you." The goblin clerk spread his hands, "Maybe you can consider buying this small cart, Gringotts-style delivery cart, durable..."

However, at this time, Professor McGonagall spoke. She had always abided by her duties as a teacher and did not express any opinions on the internal affairs of the students' families, "I suggest you go buy a suitcase first, Erwin, this is also your responsibility on your shopping list. One that has been cast with the Untraceable Stretch Charm can easily hold your possessions."

Professor McGonagall said, and at the same time gave the goblin clerk a stern look, "You should be able to keep these gold coins while we go to buy the suitcase."

"Of course." Gasly smiled awkwardly.