Rebirth of Zhu Di's son

Chapter 93 Punctuation

"Meet Your Royal Highness!"

Many students and professors who came after hearing the news knelt down at the same time to pay homage.

"Flat body."

Zhu Gaoxu sat on the chair under the portrait of Confucius in the main hall, looked down at the people in front of him, and said loudly.

After everyone got up, he shouted loudly to the door of the palace: "Bring the things in."

At this time, Zhao Junchen, who had been waiting outside the hall for a long time, immediately ordered two servants to lift up a huge blackboard and quickly walked into the main hall after hearing Zhu Gaoxu's order.

Everyone's eyes were immediately attracted to the blackboard, and they all looked sideways, including Fang Xiaoru, Xie Jin, Mei Yin, and Ouyang Lun who were standing at the front of the crowd.

Upon seeing this, Zhu Gaoxu stood up and left his seat, stretched out his hand and motioned to two servants to place the blackboard under the portrait of Confucius.

After the two servants put the blackboard away, they bowed and retreated.

Zhu Gaoxu stood in front of the blackboard, took out a box of chalk hanging from the wooden strips at the lower edge of the panel, then took out a piece of chalk, turned around and wrote four characters in regular script from top to bottom on the blackboard - The Theory of Observation of Things .

"Dear students, this thing is a wooden board with a surface covered with black paint, called a 'blackboard'. As for the white slate pen I used to write on just now, it is a soft slate pen made of limestone and gypsum. Because of the soft slate The pen is very chalky and can be wiped off with a rag, so I call it 'chalk'."

Zhu Gaoxu saw the surprised reactions of the students present and said with a smile: "The blackboard and chalk are the first meeting gifts I give you."

The students and five professors, as well as Fang Xiaoru, Xie Jin and others, all saw the blackboard and chalk for the first time. They were all amazed at the wonderful use of the two and began to whisper and discuss.

They are all scholars, so they naturally understand the value of blackboards and chalk.

In the past, classes were taught in private schools, with professors giving lectures on the podium and students listening below, referring to books.

Some professors who are good at teaching will produce some brochures or draw pictures in advance to be used in class, and hang them up during lectures for display to facilitate students to understand the knowledge in the book.

However, when the number of students is too large, it becomes inappropriate to use this teaching method.

Now the birth of blackboard and chalk will completely solve this problem.

As long as students stand where they can see the blackboard, even if they cannot hear what the professor is saying, they can still use the content on the blackboard to study, or even go to the front to communicate face-to-face with the professor.

This will greatly improve the efficiency of professors in imparting knowledge in the classroom and change the way readers learn knowledge.

"Everyone, please be quiet."

Zhu Gaoxu waited for half a quarter of an hour, and then spoke again.

Everyone quickly calmed down.

Zhu Gaoxu faced everyone, pointed to the blackboard slightly sideways, and said loudly: "This object was originally just a piece of wood with an extremely smooth surface, but the surface of the wood was covered with black paint. After the paint dried, a white soft stone pen could be used to paint on it. Do you know the principle behind writing and drawing?"

After hearing this, everyone looked thoughtful.

"Which student can give me a few words?"

Zhu Gaoxu continued: "This dynasty will not be punished for speech. At present, we are only studying the functional principles of blackboards and chalks. Everyone can speak freely."

"I would like to report to His Highness the Crown Prince, my student Yu Yanzhao, who is from Qiantang County, Hangzhou Prefecture, and I would like to speak."

Among the crowd, a tall and thin young man wearing brown clothes stood up and bowed.

Zhu Gaoxu said: "Exactly." Yu Yanzhao said: "Students believe that chalk powder can be adsorbed on the board to form writing. The principle should be the same as the gecko adsorbing on the wall without falling."

"When the student was young, he was curious about why geckos could cling to walls, so he grabbed some and observed them carefully. He found that there were many tiny fluffs on the gecko's claws. This kind of fluff should be like chalk powder and have adsorption properties to foreign objects."

Having said this, Yu Yanzhao looked around at everyone, bowed his head and said, "This is the words of the student family, please give it a try."

Then, he bowed to Zhu Gaoxu again, and then knelt down and sat down at the table again.

"Is there any student who would like to give me a few words?"

Zhu Gaoxu glanced at all the students present and asked loudly.

After waiting for a while, when no one answered, he continued to speak.

"Dear students, "The Book of Rites·Da Xue" says: 'To know things is to study things, and to know things after studying things.' The study of things to know is an important subject since the birth of Confucianism. It is a special study of the 'principles of things'. It is a pity that It has been lost for a long time. The functional principles of blackboards and chalks should contain the 'principles of things'."

"Therefore, I hope that all students can study the principles of studying objects, explore the principles of the functions of various objects, and then invent and create more utensils with practical value."

When Zhu Gaoxu said this, he turned to look at Fang Xiaoru and asked, "Does Dr. Fang know about the 'Guide Car'?"

Fang Xiaoru bowed and said, "Returning to Your Highness the Crown Prince, as far as I know, the compass is a vehicle used to indicate directions in ancient times. It is sometimes also used as a vehicle of honor for the emperor."

"The era of its origin cannot be determined. It has been lost several times and remade several times, but no information on the specific structure has been left. It is possible that the structures of compasses in the past dynasties are also different. It was not until the Song Dynasty that more complete information was available. "Book of Song Dynasty· "Book of Rites Five" says: 'As for the Qin and Han Dynasties, its creation was unknown, and Zhang Heng of the later Han Dynasty began to create it again.'"

After listening to Zhu Gaoxu and Fang Xiaoru's questions and answers, all the students present seemed to understand Zhu Gaoxu's intention, but they didn't seem to understand.

At this moment, Zhu Gaoxu struck while the iron was hot: "The Master said: 'When three people are walking together, there must be my teacher'. Mr. Changli (Han Yu)'s "Teacher's Theory" said: "Therefore, the disciple does not have to be inferior to the teacher, and the teacher does not have to be better than the disciple. There is a sequence of Taoism, there is a specialization of arts, that's all.'"

After saying this, he called Zhao Junchen to his side and whispered a few words to the latter.

Afterwards, Zhao Junchen exited the main hall, led several servants to close the door, and used the straw mats that had been transported not long ago as curtains, hanging them on the door and windows, completely blocking the light entrance of the entire main hall.

As a result, the hall quickly became dark.

After Zhao Junchen was busy, he led several servants carrying candles and came to Zhu Gaoxu again.

"Everyone, this is my second meeting gift for you."

Zhu Gaoxu said loudly.

Then, Zhao Junchen led two servants, using a baffle with small holes and a blackboard as a curtain. According to what Zhu Gaoxu taught them in advance, they used candles and the principle of using paper figures to create images with small holes, and performed A shadow scene of two people fighting.

"Which student can tell me something about the principle of this phenomenon?" Zhu Gaoxu asked loudly.

"I would like to report to His Highness the Crown Prince, my student Wang Ji, who is from Shulu County, Baoding Prefecture, and I would like to give him a try."

Zhao Junchen led a group of servants to quickly remove the straw mats, and the light returned to the palace again.

Zhu Gaoxu saw a tall and strong young man wearing only a white thin shirt standing up in the crowd and bowing.

"allow."

Zhu Gaoxu couldn't help but be a little surprised when he learned that the speaker was from Baoding Prefecture.

(End of this chapter)