Dress to be a celebrity

Under the guidance of the teacher, Zhou Wang and his party entered the spacious and bright study room with bright windows and clean windows that were converted from the main hall.

In front of the classroom is a large blackboard that takes up half of the wall, and on the white wall on the side there are wooden couplets such as "There is a road in the mountain of books and hard work is the path, and the sea of ​​learning is boundless and hard work".There is also a blackboard at the back of the classroom, densely written with various short sentences introduced by the teacher as "formulas" and "theorems", as well as some short-line drawings.

King Zhou had visited Hanzhong School of Economics before and saw the layout of the school’s classrooms, so he told the princess about these things—he didn’t quite understand the details, but he knew that they had to be memorized.The teacher copied it in the classroom, so that it is convenient for students to watch and review it when they forget.

He said a few words dryly, but it was beyond his ability to go deeper. He couldn't help but blushed slightly, pointing to the empty podium and said: "The lonely king is away these days... Cough, Mr. Song's upper body , Now he must have realized new physics, let's wait and listen to his explanation."

He is a little slack in reading, and he doesn't even understand what little schoolgirls read every day.

Princess Huan often reads newspapers these days, and occasionally listens to the lectures of the maids, and she is more familiar with the formulas on the blackboard in the classroom than King Zhou.Seeing that Zhou Wang seemed embarrassed, he made an excuse for him: "These are all old knowledge, so don't worry about it. Mr. Song must be more attentive when lecturing for His Highness than for outsiders. We don't need to guess, just wait and listen. That's it."

She took the initiative to hold Zhou Wang's hand, nodded to Wang, and asked her to sit down with her.

The desks and chairs originally arranged in the classroom are narrow and can only accommodate a thin child.Although the distinguished guests who came to inspect were not fat, they could not sit on the desks and chairs of elementary school students.The school's own servant moved the custom-made student lift table to the back of the classroom, replaced it with the long drawer desk and chair with armrests in the teacher's study, padded it with cushions, and arranged the four treasures of the study.

After Zhou Wang and his party took their seats, the teachers and students who greeted them also sat down quietly in the back row, so that the two Highnesses could personally experience the real scene in class.

After the students were seated firmly, a crisp sound of cloud plate came from outside, several times in a row, and Teacher Song entered the classroom holding a plate covered with a red cloth.

He just walked around the small courtyard that was transformed into a laboratory, and came back with the teaching aids himself.Huan Ling came in after him, also holding a tray in his hand, the bulging muscles of his forearm were exposed under the silky sleeves, his eyes were fixed on the plate, his expression was so serious that it could be called dignified.

——When he came to the imperial court to present auspicious omen, he was not as nervous and careful as he is today.

Song Shi wasn't so nervous. As soon as he entered the door, he put the tray in his hand on the podium, pulled the red cloth with his right hand, and revealed a round wooden wheel standing like a waterwheel.There is a belt connected to the two pieces painted red, red, blue and blue, with a moon gate shape dug out in the middle, and a square frame made of copper wire inside.

There are also a pair of long and thin rods like thermometers in the plate, one is a clear glass rod, and the other is a yellow-brown translucent rod made of unknown origin.The bottom of the plate was covered with fur and red silk, making people itch, wishing to dig out this knowledge from his heart immediately.

After Song Shi removed the red cloth, he did not give lectures immediately, but looked at Huan Ling nervously, and reminded him in a low voice, "You can hold your hands steady, and don't bring it down when you lift the silk. Don't touch the bottle wall, in case Is it still hot?"

Huan Ling responded with a smile, put the tray firmly on the other side of the desk, gently lifted the red silk, revealing a bottle of water or oil, which seemed a bit sticky.

Song Shi lightly tapped the bottle with his fingertips, and when he took it back, he seemed to feel that the temperature was okay, so he touched it again, looked up at Huan Ling, smiled slightly, and nodded to him.

Sitting next to the king of Zhou was the concubine. Jingli had just met his son, and he was quite resistant to the natural intimacy of the two in-laws. He closed his eyes and pretended not to see him, quietly waiting for Master Song to give a lecture.It was the first time for the concubine to see her brother and Song Shi flirting in front of others, and then she thought about the prince, concubine, and maid sitting beside her...

Really ashamed, restless.

She couldn't help stealing a look at King Zhou, but she saw King Zhou sitting upright with his eyes closed; looking at the Wang Shi beside him, he also had a peaceful expression, only looking at the few things under Song Jijiu's hands, and didn't care about him and her brother at all. There is a flurry of glances between.Then quietly looked at the female officers around him, only to see that they were all tense from head to toe, their eyes were only fixed on Song Shi's face, as if they could jump up in shock at the slightest movement.

Could it be that she knew about the relationship between her brother and Song Shi and thought too much. In fact, their actions are normal in people's eyes?

She was in a state of shock and doubt, but her eyes fell on those two people uncontrollably. She saw her elder brother look over indifferently, then calmly got off the podium, sat on the empty seat by the window, and stared at Teacher Song on the stage. .

Teacher Song swept the audience around the stage with a smile, and cupped his hands to King Zhou in the center, saying, "Your Majesty will teach His Highness and the Princess a lesson today."

The king of Zhou nodded solemnly, and the princess also nodded in return. The female gentlemen and students behind got up and gave a blessing, calling them "Mr."

Song Shi raised his hand and pressed Xuxu in the air, and said, "Today there will be no roll call, no asking people to get up to answer questions, just sit and listen at ease, and write down anything you don't understand."

Suddenly, there was a thin sound of exhalation in the classroom, and the sitting postures of the female gentlemen caught a glimpse from the corner of Wang Hao's eyes seemed to stretch a little.Song Shi, however, turned a blind eye to these small movements off the stage, cupped his hands facing the east, and called him "Chen".

"I heard: Thunder, rain and dew are all the grace of heaven."

This sentence is really refreshing, if you don't know that he is giving lectures, it sounds like he is going to the court to give advice.

King Zhou involuntarily straightened his waist, but Song Shi put his hands down at this time, turned around and said, "I have heard this a lot since I started reading. But I have only seen rain and dew nourishing all things, lakes, rivers and seas." There are fish, turtles, shrimps, crabs, pearls and corals, but how can people who have never seen thunder and lightning benevolent to the world?"

But Thunder is descended by Tianwei, so it will not benefit others at all...

Mr. Song on the stage looked calm and his words were calm, but King Zhou felt absurd in his heart, almost thinking that he was stupid in reading.

However, Song Shi picked up the glass rod from the plate and said calmly: "I haven't thought about it for a long time, so I read many stories from ancient books about lightning hitting trees and killing animals. Although it is difficult to distinguish whether the stories are true or not, they can be From this, we can draw a few characteristics of thunder and lightning: thunder and lightning often follow the rain, turning on and off, accompanied by rumbling thunder. The lightning is like an arc, and when it hits the creation on the ground, it will turn into an electric fire, burning and killing everything."

Everyone in the world says that thunder and lightning are punishments from heaven, and heaven punishes people with them.Or it is said that those animals that were struck by lightning were also evil in their previous lives, and it is difficult to atone for their sins if they are reincarnated as animals in this life... However, do the trees and palaces struck by lightning also have sins?

The King of Zhou replied unconsciously: "Then it should be that the master is guilty, and the heaven sent this as a warning?"

A descendant of a time traveler, who actually pays attention to feudal superstition, is too uncooperative.

He couldn't say anything about King Zhou, so he just smiled and didn't answer.Fortunately, there was an interpreter Huan Ling sitting by the window. At this time, he got up and spoke, citing an old book to help him explain: ""Huainanzi" said: "The difference between yin and yang is thunder." To accumulate yin, to burst into thunder'. Teacher Song uses water as a metaphor for thunder, but water has form but qi is invisible. Could it be that teacher Song has some way to make people see the invisible yin and yang two qi?"

Hearing the word "Qi", the king of Zhou suddenly remembered that the Song Dynasty had been intensively studying the theory of "atmospheric atmosphere". He praised his pressure cooker with hundreds of words.

Could this thing be able to separate the yin and yang in the air and turn them into thunder?

He wanted to ask this question, but he just missed the answer once, and he hesitated for a while in fear of making another mistake.And Teacher Song's eyes full of gratification and encouragement had fallen on Huan Ling, and he said: "Student Huan is right. Since thunder and lightning are the result of yin and yang, their essence should be like rain and dew, neither good nor evil."

Thunder and lightning hurting people is naturally like flooding the field, but there are too many thunder and lightning falling, which is unbearable for the characters.If the electricity is less, and then restrained by something that is not afraid of electricity, it can be like digging a well to draw water, and use its strength to benefit the people in an endless stream.

Teacher Song praised Huan with his identity, told him to sit back, and said to everyone in the hall with a smile: "I summarized the characteristics of lightning according to the description of lightning in the book, and compared it with what I saw in ordinary times. Electricity doesn’t have to be a gift from heaven, it can also be obtained from the world.”

He took away the plate of the hand generator and the glass rod, first put the electrolyte solution brought by Huan Ling in it, and inserted two copper-zinc plates from the pre-flow socket on the top of the bottle.

Pure copper and zinc are not rare things.Zinc is called Japanese lead at this time, and it is mostly produced in the south, and its price is slightly more expensive than lead, which is not too high.

After the two boards were inserted, dense air bubbles appeared on the boards immediately. Song Shi put on cotton gloves soaked in eucommia glue on his fingertips, and connected the two bent wires wrapped with hard eucommia glue. A little brass wire exposed at the edge is staggered and pasted together——

When the two copper wires were not attached, a bright electric spark exploded in the air, and with a bang, the whole room was shocked.

Song Shi connected the wires together several times, so that the nobles, teachers and students in the hall could see clearly, and heaved a sigh of relief, saying: "This spark is the electricity that can be used in the world, and it can flow like water between gold and iron." It can flow in objects without violating the eucommia glue, and can use its glue to confine electricity. If this charged copper wire is passed into water, even water can be electrified into gas."

Electrolyzed water produces hydrogen and oxygen, but right now he can’t talk about the structure of atoms and molecules, so he had to do the experiment first. He took the collected two test tubes and lit them on fire, and held them with iron clips for everyone to see: When electricity is passed into water, the two kinds of gas obtained by dissolving water are different, and the flame is also different in blue and red. The reason for this is unknown, but it can be seen that although the two wires lead out to electricity, there is a difference between yin and yang. According to the usual practice, when red is yang and blue is yin, let's go back along the wire and write down the yin and yang poles of the battery."

First popularize the concept of positive and negative electrodes, and then many things can be explained from here.