At that moment, Zhang San marked the water line in the water basin, and then painted a few white ash vertical lines on the inner wall of the wooden barrel, and said: "Sir, please see, this is the water level in the basin, and the water level in the bucket can be known by lifting the wooden barrel upside down in the basin." Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ”

Zhang San gently buckled the bucket on, and then slowly lifted it. Signaled Wen Huanzhang and everyone to look at the water level at this time, and then marked the line with charcoal strips at the waterline, and then lit a candle to buckle the bucket in the basin. Through the crystal, you can see that the candles in the barrel are lit, the rats are moving, and the water level is not clear to see, and you can only see the shadow vaguely.

Zhang San did these things and motioned to Wen Huanzhang to take a look, Wen Huanzhang took a look and found that there was no problem, but he wondered what Zhang San was going to do. This experiment is not something that can be done in a while. Zhang San asked Wen Huanzhang to sit down, and then said: "This experiment can prove what we breathe in between breathing and breathing, and it can also prove that there is not nothing in the space we live in, at least it has been proved that the air contains water vapor, and now our experiment is to prove that the air not only contains water vapor but also contains qi that can give birth to all things, which I call angry." ”

Anyway, no one knows, Zhang San how to say love, how to set love, Zhang San looked at everyone in surprise and looked at the mice in the crystal from time to time. "After proving that the air is not empty, we can begin to explain why the clouds are rising." ”

Zhang San said and watched the candle in the bucket gradually go out, and waited for a few minutes to confirm that the rat was not moving, so Zhang San said, "Sir, please look, the water level in the bucket has moved up." ”

Wen Huanzhang looked at it carefully, and could indeed vaguely see that the water level had risen a little, Wen Huanzhang asked, "Why is this?" ”

Zhang San said with a smile: "The candle burns, the rat's breath exhausts the vitality in the bucket, there are fewer things inside, and the water level naturally rises." "Of course, there is also the principle of pressure involved, and now everyone has not found it, that experiment is more difficult to do, Zhang San plans to talk about it later.

Zhang San gently picked up the bucket, and everyone saw that the waterline in the bucket had indeed overflowed the charcoal mark that had just been crossed, and the rats inside were also motionless in the cage. After reading it, Wen Huanzhang sat down in a chair as if he was stimulated, digesting this knowledge.

Zhang San waved his hand and motioned for Hu Jun to come over and said, "Teacher Hu, you pack up these things first, this crystal should be careful not to let the child break it." I'm going to do this experiment for the kids in a while, and there's a deeper truth to teach the kids. ”

Wen Huanzhang's eyes lit up and asked, "Oh? These are still taught in Saburo Academy? ”

Zhang San smiled and nodded: "That's nature, I will do my best to cultivate these children, as long as they are willing to learn, I will pass on what I have learned all my life." As Zhang San thought, Wen Huanzhang was really a little moved.

Of course, for a worldly master like Wen Huanzhang, Zhang San still doesn't dare to be too clever, lest it be self-defeating in the end.

Zhang San said with a smile: "Since there is a lot of qi in this air, then they are also the same as in the water: the light ones float up, and the heavy ones sink." And everything in the world is hot and cold and shrinking, is it credible? ”

Wen Huanzhang nodded and said: "Naturally, ancient books have long recorded that copper coins are small in winter and big in summer. ”

Zhang San nodded and said: "In this way, the water vapor rises because the volume of heat increases, and the air in the Kong Ming lantern increases because the volume increases so it floats. What do you think, sir. ”

For Wen Huanzhang, who had never listened to a physics class, these things were still a bit profound, he sat down and thought carefully. Zhang San saw that it was already noon, and immediately asked everyone to disperse to prepare for lunch.

Wen Huanzhang couldn't turn the corner for a while, Zhang San had to briefly talk to him about the principle of buoyancy and other content, as he learned, the more Wen Huanzhang felt that this knowledge was broad and profound. For Wen Huanzhang, who is conceited to know astronomy and geography, he never thought that there was so much truth in this daily life.

After chatting for a while, Yifei and the others prepared the meal and withdrew, Zhang San invited Wen Huanzhang to dinner, and at the dinner table, Zhang San explained to Wen Huanzhang that he knew the role of these things, for example, since the principle of Kong Ming Lantern is clear, if Kong Ming Lantern is big enough, can it take people to the sky, and whether it can control the height of Kong Ming Lantern by adjusting the temperature in the lamp, and so on.

After hearing this, Wen Huanzhang couldn't help but look forward to the taste of traveling around the world on the empty Kong Ming lantern, and then Zhang San talked about knowing the law of clouds, rain and vapour, which is more helpful for predicting the weather.

The two chatted and ate, and after eating, Zhang San invited Wen Huanzhang to visit his temporary school, and then took him to visit the soon-to-be-completed Yixue, and then told him about his future school-running philosophy and so on.

Wen Huanzhang already roughly understood what Zhang San meant, but he was still a little hesitant, after all, his career was not dead, and now he was still running around the powerful house every day in the hope of getting a recommendation. promised Zhang San to learn other people's things by himself, and it would be embarrassing to leave in the future.

Zhang San saw his hesitation and said with a smile: "Mr. is talented, he has great ambitions, how can my small pond trap a dragon like Mr. ”

Zhang San looked at him and said, "All I want is for my husband to teach a thing or two in his spare time, and occasionally teach these children some culture, that's all." ”

Wen Huanzhang saw that Zhang San said this, so it was not good to postpone it, so he hugged his fists and smiled at the moment: "So I will mix a few bowls of dry rice and eat in this private school, and then San Lang will not dislike me for eating too much and just catch up with me." ”

The two looked at each other and laughed, and there was a feeling of heroism and sympathy.

Maybe he can still be proud of his talents in front of others, but this Zhang San is more than capable of poetry, strategy, and knowledge. Looking at the policy he offered to save the people, half a month to solve the plight of tens of thousands of refugees in the capital, if all localities do the same in the future, the world will be civil.

Looking at yesterday's Keju competition, I never imagined that such a policy for the benefit of the country and the people would be so comprehensive. He knew about Zhang San's strategy to save the people, so he also felt that these things that Zhang San studied were manifestations of Zhang San's familiarity with astronomy and geography. I guess if someone else said it, he would definitely think it was a strange lewd technique and dismiss it.

So through these two exchanges, he found that Zhang San is really a pedantic day, ancient and modern, and he thinks that his predecessors have not felt it, and these things can be proven, which can't help but make him, a person who claims to know everything, ashamed, and wants to study hard.

Zhang San thought that it was true, after such a big effort, he finally dug up a literati, this is not easy to deceive, how can there be a hero, it seems that it is really not a simple matter to recruit cultural people.

Fortunately, I came early, and now I start to prepare, and I will definitely be able to cultivate more talents, and I can rest assured that I will use it myself.