This time, the public school said that 200 invitations were sent, but among the 200 people, not all of them were lifters, and a few of them were born in Gyeonggi. In today's lecture hall, of course, there are far more than 200 people, and there are also astronomical and mathematical talents who came in with another batch of invitations and were called to Beijing, including Ye Mengqiu and others who borrowed to live in Zhang Yuan.

In addition, there is no doubt that there are some guys who are close to the water and get the moon first, for example, Fang Qing and Song Juren, as well as Zou Ming and other three people, Yang Zhan and Guan Qiu also got seats by virtue of their status as guests in Zhang Yuan.

At this moment, although His Royal Highness the Crown Prince was ushered in, many newcomers were surprised by the warmth of spring in this lecture hall, some whispered that the public school was rich, but there were also people who whispered about luxury, and the little peanut who came to help today almost wanted to scold. On a cold day, if the walls of fire on all sides of the lecture hall don't burn, it's no wonder that you don't freeze to death!

But at this time, Little Peanut also heard what Lu Saburo said to the third prince. Except for those people in Jiuzhangtang, who have long been accustomed to the attitude that people never treat the prince as a god and Buddha, in the huge lecture hall, everyone else has changed color. But what made them even more unexpected was that the third prince gave an answer without even thinking about it: "I can't ask for an assistant to the teacher!" ”

The third prince is indeed happy to be Zhang Shou's assistant. As early as when he was in the middle of the mountain, he had personally seen many very simple but very interesting experiments done by Zhang Shou, whether it was small hole imaging, triboelectric generation...... All of them opened his eyes, and he only felt that there were countless secrets hidden in this world.

At this moment, he stood on the edge of the podium without thinking, and when he saw Qi Liang bring a basin of water and put it on the high podium, he couldn't help but look at it curiously, and when he was a little puzzled, someone below couldn't help but exclaim: "Crystal basin!" ”

Hearing the three words of the crystal basin, the third prince was slightly stunned, but then thoughtfully rubbed the basin that looked irregular, and then knocked it twice, then raised his head and smiled calmly: "You have never seen this thing, so you will mistakenly think that it is crystal." Actually, this is the glass that the teacher fired not long ago. ”

"The teacher has already dedicated the glass formula to the imperial court, and now the workshop under the jurisdiction of the Ordnance Bureau is also trying to make it, but there is no way to make such a large utensil, I didn't expect that the teacher's workshop has broken through the limit of the size of the instrument, but it is not very transparent."

Speaking of this, an enthusiastic voice came from behind him: "Senior Brother Qi, what did the teacher take out this glass basin for?" ”

Without turning his head, the third prince knew that the person behind him must be the fourth prince. Sure enough, after the person flashed out from behind him, he didn't seem to see his reproachful eyes, and said to himself: "Senior Brother Qi, just the third brother of the prince is an assistant alone, how boring it is, I will also help!" Don't worry, if the teacher doesn't tell me, I will never mess around! ”

Hua Qi, who was mixed in the crowd below, couldn't help but cover his forehead. This bear child really doesn't cause a little trouble for a day, then he is unwilling, and he should have left people in the palace if he knew it!

And although most of the other people who came today didn't know the four princes, they knew that it was the fourth prince when they saw the age of the person and heard that there was a prince and the third brother, and at this time they heard that this little guy was actually a dead face and wanted to be an assistant, and then thought of the attitude of the third prince when he agreed to Lu Sanlang just now, and I don't know how many people were even more envious and jealous of Zhang Shou.

At this moment, they finally heard an unhurried voice: "I'm really sorry, I prepared some things inside, and I didn't have time to go out to greet His Royal Highness the Crown Prince and the Fourth Prince, as well as my colleagues." ”

Zhang Shou did not wear an official robe today, but wore a Confucian scarf and a blue shirt, but even if it is the common clothes of such a scholar, wearing it on him, it still looks like a jade tree in the wind, a talent. So much so that after deliberately dressing up well, Zhu Ying, who came in in the crowd dressed as a woman, looked at it, but couldn't help but secretly purse her lips and smile, not paying attention to Zhu Hong on the side who was already as pale as earth.

Today, he was originally ordered by Zhu Ying to come out to invite the so-called female master, but who would have thought that the eldest lady entered a ready-to-wear store, claiming to be visiting friends, and then never came out, when he rushed in, he saw that the person had come to a magical transformation, and when he came in, not only was he not in a hurry, but he also took out two invitations and pulled him with him without saying a word.

Of course, he originally wanted to refuse, but Zhu Ying said that he had already been approved by Mrs. Tai and Mrs. Fuli, and the previous excuse was just to fool his father and brother, after all, those two did not allow her to come over today, so he had no choice but to follow. But the thought of having to listen to a large number of things with a group of scholars that he could not have understood at all made him feel that his eyes were dark.

After all, others don't know how difficult Zhang Shou's class is, but he knows it, because he has been ordered by Mrs. Tai and Zhao Guogong many times to go to the bookstore to collect all the published volumes of "Ge's Arithmetic New Edition", and even because of Zhu Ying's relationship, he secretly infiltrated Guozi to listen to Zhang Shou's lessons to the students of Jiuzhangtang. He would rather go to the battlefield and kill people than go through that baptism again!

And at this time, sitting next to Zhu Ying, he had to watch out for whether the scholar on the other side would be a disciple, take advantage of her after discovering the eldest lady's disguise, and on the other hand, he had to be wary of whether there would be assassins with ill intentions in the crowd, etc., so he secretly regretted that he shouldn't have escorted Zhu Ying over alone before. But just when his heart was in turmoil, he suddenly felt a light poke on his back.

He tensed almost instantly, but soon realized that it wasn't a stab, but someone had poked his back with a finger, as if he had something to say to him.

After hesitating for a moment, Zhu Hong finally turned his head slightly, and immediately found that Zhu Er, who was sitting directly behind him, with an innocent face. On the left and right sides of the person, it was Zhang Chen, Zhang Wu, Zhang Lu and a few Guijie children who had seen it. At this time, it was none other than Zhang Chen who poked him!

I saw that the eldest son of the Qin State glanced at him and asked him to quickly turn around and not alarm Zhu Ying. But before Zhu Hong could do so, Zhu Ying seemed to notice something, and suddenly turned her head.

Seeing such a group of people sitting behind her, the eldest lady was only slightly stunned, and her face smiled, and then she turned her head back without saying anything, but glanced at the other side of herself. When she saw that the scholar who was supposed to be sitting next to her was sitting on his back, his back straight, but his ass was only next to the edge, separated from her, she laughed softly.

And with this smile, she found that the person next to her seemed to freeze, and she suddenly understood in her heart. There is no doubt that people know her, even if she is disguised, but strangers may not notice that she is a woman, but those who have seen her can see it from many details, otherwise, how could the guys behind her sit behind her so well?

Well, of course, it may also be arranged in advance by Zhang Shou when he distributed the invitations......

But at the moment, the person next to her should not be Zhang Shou's arrangement, or rather, she feels that the person next to her has a palace atmosphere. That was the inherent aura of some people she saw in the Qianqing Palace and other places when she entered the palace since she was a child, and in addition, Uncle Hua, who she was most familiar with, also had such an aura on his body.

Zhu Ying didn't explore for too long, because at this time, Zhang Shou on the stage had already begun to speak.

"When Jiuzhangtang was in Guozijian in the past, he also held an open class, and at that time he didn't take care of outsiders to observe, just blindly speaking, just like the blackboards I used to solve problems on the spot on the day of Lu Gaoyuan's crown ceremony not long ago, most people have not understood it, so naturally I can't help but lose the original meaning of the three words of the open class."

"Therefore, I originally planned to simplify the complex today and talk about everything in simple terms, and it just so happened that His Royal Highness the Crown Prince also came to watch, so I will use the hands of His Royal Highness the Crown Prince to demonstrate a few small experiments in public."

Although there were the third prince and the fourth prince as assistants, Lu Sanlang still stood next to him with Qi Liang, preparing that if there was anything wrong with the brothers, he would immediately rush forward to pick up the gaps. However, when he saw the students standing around to maintain order, they all had genuine stunned expressions at this time, and he couldn't help but sigh in his heart.

When he first apprenticed, he was actually a little Jiujiu, but after such a long time, he was actually very convinced of Zhang Shou. But this teacher is good at everything, but there is one thing, and he often likes to hide from everyone at some point to make a wonderful show!

For example, today, even he doesn't know what Zhang Shou plans to talk about......

Of course, when he saw the glass basin, he actually had a faint premonition in his heart. Because not long ago, Zhang Shou dropped an earth-shattering assertion among them - iron ships can float on the water!

After the unhurried opening remarks, Zhang Shou casually explained his experiment at the sutra banquet that had been denounced by Confucius scholars as a demon law, but at the moment he did not plan to show it in kind, but continued to say: "As we all know, people will sink when they fall into the water, iron and stones will sink when they enter the water, but light objects such as wood can float when they enter the water. ”

"And today, my first experiment is to let you see a very simple experiment of ups and downs."

Speaking of this, Zhang Shou casually showed an egg in his hand, when the egg was put into the glass basin, the people who were looking forward to observe could see that the egg was sinking straight to the bottom through the basin that was not too transparent. But before they could figure out what Zhang Shou wanted to express, they only heard someone speak again.

"I think everyone can see it clearly. Then next, His Royal Highness the Prince, take the trouble of adding the things on the table to the water. ”

The third prince was thinking about what Zhang Shou's words had to do with the last class, and when he heard that he was supporting himself, he immediately came back to his senses and hurriedly stepped forward to help, but with a shake of his hand, a small bag of white coarse grains next to him was all poured into the basin by him at once! But before he had time to secretly scream badly, he saw Zhang Shou casually take a chopstick and stir it vigorously in the water.

After a long while, he saw a jaw-dropping scene. The egg in the water trembled and floated!

Although the people below haven't had time to see what the situation is clearly, they can still see clearly the expression of the third prince who almost didn't stare at him. As for the lectures and readings that sat on the podium at the invitation of Zhang Shou before, they already had some predictions from the changes in the faces of the curious audience below.

So, Yue Shanchang was the first to stand up and ask, "Could it be that the eggs in the water are floating?" ”

As soon as these words came out, there was a small commotion below. Although there were still people who had accused Zhang Shou behind his back before, but at this time, His Royal Highness the Crown Prince is at present, no one will lose his temper in the Wenhua Hall like the former Confucius scholar, but there are definitely more than one or two who scold the demon law in their hearts. And at this moment, they only listened to the four princes shouting.

"That's right, it's true that the eggs are floating in the water! But, teacher, why is this, what is the white thing you asked the third brother of the prince to add? How can the egg float after two stirs? ”

Seeing that the fourth prince directly intercepted his question, Yue Shan Chang was supposed to remain silent, but when he saw that Zhang Shou did not answer immediately, but turned around and looked at himself with a smile, as if he didn't care that he was suspected of finding fault with this question, he hesitated for a moment, and simply asked: "If I guessed correctly, what was just added to the water should be salt, right?" ”

Hearing Yue Shan's words, there was an uproar at the bottom, especially the person who was still whispering to his companions just now, who was even more dumbfounded. And Zhang Shou smiled calmly: "Yue Shanchang is really as wise as a torch and knowledgeable, yes, it is the most common salt for ordinary people." ”

"Where is the discerning and knowledgeable thing, it is because I grew up by the sea as a child." Yue Shan smiled to himself, and then said calmly, "Traditionally, when sailing on the sea, it is inevitable that there will be shipwrecks, although most of the time there is no life, but sometimes, there will be one or two lucky people who encounter fishing boats and are rescued, and some claim to have been floating on the sea for a day or two. ”

"The sea is no better than a river, and even a good swimmer cannot cross tens or hundreds of miles. But some of these lucky ones don't even have a sampan, and they are rescued by pure luck. Although most people regard this as a blessing from the gods, I have heard about it and visited several people who have survived and been rescued, but I have heard one thing from them. ”

"That is, in the sea water, if it is not the coldest time in the cold winter after falling into the water, the temperature in the water is also suitable, and there is no storm, plus good swimming, then it is easier for people to float in the sea water than in the river."

Hearing Yue Shanchang talk so eloquently, Lu Sanlang, who had heard Zhang Shou talk about the buoyancy formula before, widened his eyes. Today's lecture does have similarities with the previous class, but he didn't expect that the person who took the initiative to cooperate with Zhang Shou's lecture would be Yue Shanchang, the head of Zhaoming Academy!

Not only Lu Xiaofat, but even Song Juren, who was very familiar with Yue Shan's long life, couldn't help but ask Fang Qing on the side: "Is the sun coming out of the west?" Your teacher seems to be modest, but in fact he is the most eye-catching person, and he will speak for Mr. Zhang? Is there any conspiracy here? There is no doubt that he received a sharp eye knife from Song Juren.

And Zhang Shou saw that the discussion was even worse at this time, he did not open his mouth to remind or admonish, but nodded and said slowly: "As Yue Shanchang said, just now His Royal Highness the Crown Prince added salt to the water, so the eggs that originally sank into the clear water finally succeeded in floating, and this is similar to the reason that people float conditionally in the sea." So, why is that? ”

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