I was a village chief in a primitive society

Yuying kept blinking her pink eyes expectantly, wanting to see what the truth was.

At the same time, Yanhua and Cat-Ear Girl also finished their training, and they happily returned to Yong'an Building

"Wu, what are you doing with all these rocks? Sha Lan asked curiously.

Yu Ying became excited instantly, waving her hands and saying:"Wu said that if he wants to make ice, he will use these stones.""

The fox-eared lady is so excited. She is as happy as a three-year-old child now.

"Making ice? Can it be made in such hot weather?"Sha Lan also doubted her ears.

"Just use these stones? This one is amazing."Yanhua's curiosity was immediately aroused.

Although Niujiao Niang knew that this was a bit of a fantasy, but it was what the witch said, it would probably come true.

"Making ice from saltpeter is not difficult, you will be able to do it after reading it."Su Bai said lightly.

He started to clean the stones. He didn't want to say too much, so he just showed them the operation.

In fact, the principle of making ice with saltpeter is that when saltpeter dissolves in water, it will absorb a lot of heat and cool down the water. Since then, there has been a method of making ice in summer, which often appeared in ancient times on the earth.

After the saltpeter is dissolved into water, the saltpeter can be extracted and reused by cooling crystallization or evaporation crystallization.

Su Bai will A large amount of saltpeter was placed in the water. Originally, ice making had to be carried out when the surrounding environment was relatively low.

But the Yanlong tribe did not have a cellar, so it could only make ice indoors.

He was the first to make ice. Put the frozen water in the large wooden barrel, and then put the saltpeter in the water in the small wooden barrel.

After the saltpeter entered the water, it quickly absorbed the heat in the water, and the temperature of the water in the small wooden barrel also slowly dropped.

Yuying and others were lying next to the barrel and watching curiously, wanting to see how this magical scene happened.

"Witch, do you want to use witchcraft? Sha Lan asked curiously.

The cat-eared girl felt that this step must be done through witchcraft, otherwise it would be impossible to turn water into ice cubes with stones.

"Witch, is this witchcraft difficult? Why haven't I heard of you before?"Yanhua blinked her red eyes curiously.

"Hahaha....."Su Bai smiled heartily and continued:"This does not require witchcraft, this is the power of chemistry."

In the eyes of the girls, some incredible phenomena are almost always explained by witchcraft.

"What is chemistry? Are they the experiments that Coco did before?" Sha Lan guessed.

I seem to have heard this term before, but I just don't understand it.

"Pretty much, chemistry is a very interesting thing, you can learn it if you want to." Su Bai said gently.

It would be good to let more girls add knowledge. After all, knowledge changes destiny.

If he had no knowledge or any common sense in time, I am afraid he would not be able to stay until now.

He must be ashamed of his knowledge. Reserve more, so that he can reveal his farming plan in the primitive era

"yes. Sha Lan nodded in understanding.

Yan Hua fiddled with her scattered hair and said in surprise,"I already feel a little cool.""

Because the water temperature in the barrel began to slowly drop, and they were so close, they could naturally feel the changes.

"You have to wait for a while, mainly because our environment is not very low. You will see the difference after a while."Su Bai said as he put saltpeter in the barrel.

If you want the water in the barrel to freeze, the amount of saltpeter you put in must not be less.

"Do you want to wait a while?"Yu Ying couldn't wait any longer.

The three girls were just watching around the bucket. No one wanted to leave, as if they were afraid of missing something.

"Don’t be in a hurry, it’s not that fast, you can eat some fruit and wait slowly."Su Bai was amused by the behavior of the three people.

If the current environment is under the cellar, the water in the shepherd boy will freeze faster.

It will also be more conducive to the preservation of ice and will not cause the ice to freeze quickly. Melting.

On the other side of the earth, it usually took ten days to replace saltpeter in ancient times. The saltpeter used by the royal family can be replaced every half a month, and the cost is not high.

Whether ice cubes can be stored for a long time mainly depends on the choice of the cellar. The lower the temperature, the longer the saltpeter replacement cycle of the saltpeter refrigeration container will be.

"Wu, you just said that if the surrounding environment is colder, it will be easier to make ice, right?"Yu Ying thought of this sentence

"Well, it would be better to have a cellar."Su Bai nodded.

"Witch, what is a cellar?"Sha Lan was very curious when she heard the new vocabulary.

Su Bai picked up the teacup and explained slowly:"It means digging a hole on the ground, and then digging a big hole underground. This is the cellar."

"Witch, what can a cellar be used for?"Sha Lan doesn't understand why a big hole is dug underground.

Wouldn't it be nice to live on land? This cellar can't be used to live in people, right?

"The main function of the cellar is to store things. Sometimes the cellar is a natural place for preservation."Su Bai explained simply.

The function of the cellar is not only for making ice, but also for storing a lot of vegetables.

Sometimes when it snows in winter, you can put the harvested vegetables in before it snows.

The storage time can be up to one or two months, as long as the temperature inside is low enough, it can be considered a not-so-cold refrigerator.

"That’s it, then should we build a cellar?"Yanhua became excited after hearing this.

Niujiao Niang always felt that this cellar sounded very powerful, and she thought that the Yanlong tribe also had one.

"It's not impossible. When the time comes, you can store all the wine in the cellar."Su Bai took a sip of the tea ceremony.

Now the Yanlong tribe has begun to brew a large amount of wine, and storing wine is also a very important issue.

The weather in the primitive era is ever-changing, and it may not be very safe just to store it indoors.

"Great, the Yanlong tribe alsoThere is a cellar."Yanhua was so happy that she laughed out loud

"I will draw the design drawings later. Alan, you can find someone to find a suitable place to dig."Su Bai ordered.

Digging a cellar is not difficult. As long as there is a suitable site and suitable workers, it can be dug in a few days.

While everyone was chatting, more than an hour passed unknowingly.

"Wu, the water is starting to turn into ice."Yu Ying shouted in surprise.

When the fox-eared lady was chatting, her heart was always paying attention to the situation in the barrel, and she wanted to take a look at it all the time.

Su Bai also walked to the barrel to observe, and said with satisfaction :"Looks like we succeeded."

Maybe it's because the saltpeter in the primitive era was relatively pure, and you can feel the coolness even before you get close to the barrel.

"Great, we also have ice in this weather."Yu Ying smiled happily..........................................

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