I saw the kettle on top of the charcoal fire, and the water in it was boiling, but the most important thing was, what about the lid? Where is the lid of the pot?

Without a lid, it's strange that you can realize the steam engine!

Zhang Mingwei was really a little speechless, so he asked: "When you are observing, you don't have a lid, right?" ”

His question immediately made a group of people dumbfounded.

They were clever and immediately realized that they needed a lid to observe this!

Huang Zongxi thought about this, and couldn't help but be very annoyed, so he subconsciously explained: "If there is a pot lid, you can't see the boiling water boiling." ”

The others listened and nodded.

"......" Zhang Mingwei was speechless when he heard it, maybe they even deliberately asked people to remove the lid of the pot.

So, without saying anything, he asked people to add a lid, and then asked people to plug the spout.

Then, Zhang Mingwei said to them: "Okay, you guys pay attention to it next." ”

Hearing this, whether it was Zhu Yujiao or Fang Yizhi, they all stared at the kettle to see what would happen.

At this moment, Zhou Yuji, who heard the news, also came.

To change the truth of the times, he also secretly boiled water, but he didn't find anything, so he was also very curious.

After a while, the boiling water vapor lifted the lid of the pot, released the steam, and then fell again, and so on.

After Fang Yizhi looked at it for a while, he found that there was no other phenomenon, and he couldn't help but wonder a little, and said, "It doesn't mean that boiling water can open the lid of the pot, right?" ”

"That's right, this is it!" Zhang Mingwei listened and replied affirmatively.

Fang Yizhi also said in passing, I didn't expect it to be true, and suddenly, I was a little stupid, what kind of truth is this to change the times?

He didn't have the same respect for Zhang Mingwei as Huang Zongxi, so after hearing this, he said a little unhappily: "Could it be that Guogong is entertaining us?" ”

The princess was here, and he didn't dare to talk nonsense. If the princess wasn't here, she might have spoken even harder.

At this time, Huang Zongxi was also a little disappointed. According to his thoughts, when Zhang Mingwei can say so many unbelievable conclusions from the fact that his folding fan fell to the ground, then this conclusion that changed the times will definitely be very shocking. The result is just boiling water and opening the lid of the kettle, what is this?

However, he and Fang Yizhi had different ideas, and they didn't think that Zhang Mingwei would entertain them, so he said to Zhang Mingwei sincerely: "Please also ask the Duke of the State to make it clear!" ”

There must be truth in it, he believed.

It's Zhu Yujiao, because she has watched documentaries and seen steam trains. She kept staring at the lid of the pot, and the steam came out and out. At this time, she finally thought of something, so she asked a little uncertainly: "Sir, can the strength of this top pot lid pull something, such as a car?" ”

When Zhang Mingwei heard this, he pointed at her and praised: "That's right, that's it, you can think of this, it's really good!" ”

In ancient times, it was the gentleman who paid attention to cooking. All these people gathered here can be said to be in this category. Before Zhang Mingwei asked them to observe, it is estimated that they had never seen such a thing as boiling water.

In addition, even if you see it occasionally, if you are not sensitive to the transformation of power, you will not think of using the power of steam.

If you have to find a Ming who may realize this truth, it is estimated that there is only the one who Zhang Mingwei asked the emperor to summon before.

At this time, Fang Yizhi, who has a superior life, and Huang Zongxi, who can be regarded as passable, have not come up with this. When they heard that the princess's words were correct, they were all taken aback.

"Guogong, how can you pull the car with the strength of this steam?" Huang Zongxi couldn't figure it out, so he asked directly.

Fang Yizhi also asked: "Even if you can pull a car, what's the matter, what kind of change of times is this, at most, it's just pulling a car!" ”

They really couldn't figure it out, and felt that Zhang Mingwei was exaggerating.

However, Zhu Yujiao was affirmed and knew that she was right, of course she knew that it would definitely change the times. The air-pumping cart can be very long and can carry a lot of things.

At this time, when they questioned Zhang Mingwei, he was a little angry, and immediately said to them: "I am stupid, I don't know how to ask for advice with an open mind, is this how you study?" ”

"......" When Fang Yizhi and Huang Zongxi heard it, they didn't dare to refute the princess's words, at least on the surface, their attitude changed.

Zhang Mingwei can see that although they have changed their attitude after being told by Zhu Yujiao, in fact, they are definitely not convinced in their hearts.

Well, even the chief soldier on the side was unimpressed!

Zhang Mingwei glanced at Zhou Yuji, and then said to them: "Have any of you seen the waterwheel in the field?" ”

Huang Zongxi has seen it, but Fang Yizhi and Zhu Yujiao have not. Zhou Yuji didn't speak, so he ignored him.

Zhang Mingwei then explained to them: "When the water falls, it drives the waterwheel to rotate, so that the waterwheel can automatically fill the people with water. It is an application of power transformation. This steam, in fact, is the same thing. ”

Without waiting for them to ask, he continued: "However, with the power of water, this is limited by the terrain and cannot affect most of the people. However, the power of steam can be used in any place, as long as water can be boiled, there can be steam. ”

Speaking of this, Zhang Mingwei pointed to the kettle with his hand and said: "Each of you can try the power of this steam, press and hold the lid of the kettle to feel it, be careful, don't get burned!" ”

Hearing him give an example, even the most unconvinced Fang Yizhi already knew that there must be a university question here, and his attitude was obviously much better. After hearing what Zhang Mingwei said, and waiting for Princess Kunxing to try it first, he couldn't wait to feel it.

"Well, that's a bit powerful, isn't it?" After Zhang Mingwei saw that they had all tried it, he said, "If you replace this kettle with a sturdy cylinder, and change this kettle lid to a piston ......."

These people in front of them are already one of the least pedantic readers in the Ming Dynasty, and what is even more rare is that they do not discriminate against miscellaneous studies, and they are even still studying miscellaneous studies, so that there is no better audience than them. Therefore, Zhang Mingwei explained to them in detail the principle of the steam engine.

When he had said that, he gave them an imaginary and said, "As the princess said, if this set of things were to be carried into a cart instead of a cart drawn by oxen and horses." As long as you can do as little as possible to waste this power, can you imagine how many carriages can be pulled? Also, when it moves along a fixed track, will it be able to move around the clock? Again, what if this set of things is moved to a ship and used as a driving force? Wait, imagine for yourselves, will this set of things end up changing the world? ”