Chapter 584

"When it is salvaged from the well, the outside air will enter the bottle through the gap in the silk fabric."

"This is equivalent to a process of air expansion, and expansion will consume internal energy."

"Absorbing heat from the bottle, causing the temperature in the bottle to drop further."

"Finally, the water vapor condenses and generates ice cubes."

"From a physical point of view, making ice with hot water is indeed feasible."

"However, the ice made is very little, and most of it is ice slag."

"Coupled with making ice with hot water, the requirements for air humidity, container volume, and water temperature are very high."

"Current scientists have not been able to perfectly replicate it."

"Due to the scarcity of ice cubes, the ice at that time was provided to royal nobles."

"Ordinary people really don't have the blessing to enjoy it."

"During the Tang Dynasty, the ancients mined a large amount of saltpeter when producing gunpowder."

"In an accidental opportunity."

"They discovered that saltpeter dissolves in water and absorbs heat."

"It can make water at room temperature cool down and freeze quickly."

"This convenient and fast ice-making method allowed ordinary people to have the opportunity to enjoy ice cubes in summer."

"The principle is to put water into a jar."

"Then use a larger container to hold water."

"Then put the jar into the container."

"As long as saltpeter is added to the container to let it melt and absorb heat, the water in the jar will freeze quickly."

"By the Ming and Qing Dynasties, making ice and eating ice had become very popular among the people."

"And this way has also spread to foreign countries."

"At that time, there were even ice sculpture art works."

【Popularity】 +1+1+1+1.

──【Now another question has popped up, can saltpeter ice be eaten?】

──【This question can clearly show that you are a person who lacks imagination.】

——【Why would you ask such a stupid question? The isolation method can be eaten, don't you even know this?】

——【Now many people feel that they are much smarter than the ancients. I think some questions don't need to be told to these people who think they are smart.】

——【When did it start to advocate drinking hot water and not eating ice?】

——【Lack of materials, for disinfection.】

——【It was only in modern times that such a statement suddenly appeared.】

——【Really amazing, China's ancient ice storage and ice use have a history of more than 3000 years.】

——【Sigh, wait until 2000 years later, we will also be ancients.】

——【These royal nobles are really good at enjoying themselves.】

——【There is so much ice in the Antarctic, move a dozen or twenty carriages.】

——【I want to know if the Records of the Grand Historian is still being continued.】

——【Really learned a lot. Many things have never been touched before. After listening to Fang Yang's explanation, I have a feeling of sudden enlightenment.】

——【The wisdom of the ancients is something we can always learn and explore.】

——【No wonder there is a saying that a family that cuts ice does not raise cattle and sheep.】

——【I don't care. At that time, the climate was lower than it is now, so of course there was ice. Now there is less snow in many places under the current temperature, but the storage method is quite good.】

——【Although the way of use is the same, the ancient refrigerator is not an electric refrigerator. One is putting ice into a cabinet, and the other is that the ice cabinet can make ice by itself. I think the two cannot be confused.】

522, Really learned a lot, are we people living in the same era? (Seeking full subscription)

——【You must know that in the 50s, aquatic products companies were still storing ice, and they bought it for one cent a catty in winter.】

——【I saw adults storing ice when I was a child.】

——【Fang Yang is right to say refrigerator, he didn't say electric refrigerator.】

——【Really very interesting, really learned a lot.】

——【Some people know too much. I found that we should not be people living in the same era.】

——【It seems that storing ice is illegal now.】

——【We are probably not talking about the same one.】

——【I suddenly feel that I finally understand a little why the ancients couldn't do it when they reached 50.】

Everyone is happily saying some things.

At the same time, some people pointed out that they hope Fang Yang can talk more about history in the future.

"Actually, there are many, many things about history. If you are curious, sometimes when I am not busy, you can ask me. I will definitely tell you what I know, just like the ghost work ball before. Understanding our Chinese culture and the history that makes us proud is a good thing for us."

Fang Yang usually explains the profound history of those artifacts while digging them up.

This often lets everyone understand some situations.

It can also allow them to think more about history.

When Fang Yang was interacting with people in the live broadcast room.

Some people walked in from outside the cave.

They were some students who were worried that there was danger inside and refused to come in for a long time before.

Although they didn't come in, they took out their mobile phones to watch Fang Yang's live broadcast, so they knew that Fang Yang and the others were not only fine, but even discovered ancient objects.

After knowing this, they couldn't wait to come in.

However, after coming in, they found it difficult to stay calm.

"This is even more shocking than seeing the situation through a small mobile phone."

A group of students wanted to approach after coming in, but as soon as they came into contact with the eyes of Fang Yang and the Cameraman, they felt embarrassed.

They felt that their behavior was really too much.

Before, they refused to come in.

That was because they felt that it was very dangerous inside.

But now that they know there is no danger inside, they want to come in no matter what.

This made them feel that their behavior was really too much.

When these students were uneasy and didn't know what reaction to make.

Fang Yang raised his chin and said to them: "You came just right, you can think carefully about what way to take the things inside out directly."

Fang Yang said this very seriously.

He didn't even talk about the fact that these students were unwilling to come in with him before.

Fang Yang didn't take the initiative to mention it, so naturally others wouldn't mention this matter.

Seeing that Fang Yang was such an attitude, their hearts couldn't help but become much more at ease.

"Don't worry, Fang Yang. Leave this matter to us, we will definitely take this artifact out."

After seeing Fang Yang and the Cameraman leave, they started to worry again.

When they came in just now, they found that the gap at the cave entrance was not very large.

If they want to take this ice container out, they must first think about expanding the cave entrance.

They couldn't do this.

The only thing they could think of was to call the teacher, hoping that the teachers could help them.

Before they acted here, the teacher felt that they had done a lot of useless work, and it was simply a waste of time. Most teachers did not agree with what they did.

Everything that developed to this step later was something they did very firmly and consciously.

After calling the teacher, when the teacher comes over, they will definitely be very shocked by the artifacts they unearthed today.

Some students couldn't help but dial the phone.

And someone from the teacher's side soon came over.

Time moved back minute by minute.

Several students also followed Fang Yang, following behind him.

523, The students' prediction failed, you don't have a golden finger again! (Seeking full subscription)

This time Fang Yang's eyes didn't seem to fall into those caves, but instead fell on some relatively high positions.