I saw that there was water flowing in the pipes all the time.

Fresh water is really available, which makes Lawrence feel a lot more relieved.

As long as there is water, a constant flow of water, then there will not be a lot of worries.

Mars looked at the dwindling amount of water in the transparent device, and the white grains of salt that could be seen in the seawater, and he also had a new idea.

He had indeed tasted this white salt before.

But there's something else in this salt.

It could be some impurities in the seawater.

Therefore, they also need to be purified before they can be eaten.

Lawrence had said before that the salt he prepared was black in color, but there was no problem with it.

In their human experience, eating it doesn't matter.

So this color of salt should have been carried out by Lawrence in the past to remove impurities.

"Father, we don't have much salt to eat, you see there are a lot of white salt grains here, you can teach me how to make salt. ”

It was time to rest, and Mars waited for all the water in the distillation device to evaporate, and then took out the remaining salt.

And then it was filled with seawater again.

At this time, these sea salts cannot be thrown away.

They're still useful.

"Good!"

"It's a bit complicated, you and I dive into the sea to get some raw materials, and then we can remove impurities. ”

Lawrence said as he watched Mars fill a large basin of snow-white salt in a stone basin.

Mars finally wants to know how the people of this world make salt.

So he hurriedly put this thing aside, and followed Lawrence to the sea.

It's a kind of inheritance of experience, so Mars needs to learn it well.

Mars dived with Lawrence, and both Lawrence and Mars had been familiar with the waters several times recently, so they basically knew what was here.

In this way, Lawrence's purpose of searching is more direct, and it will not waste much time.

After the dive with two people, there was no more than three minutes to go.

Mars and Lawrence peeked out of the water.

And in the hands of both of them there is a gray fish.

These fish are not very big, but they are not small either.

The only thing that is different from other fish is their color, which is gray in color and looks very ordinary, and it will not be noticed at all.

Mars originally thought that he should follow Lawrence to dig something up.

But when he and Lawrence caught the grey fish in the crevices of some reefs, Mars thought he could guess it.

So he followed suit and caught one.

It wasn't until he re-ashore that Lawrence began to speak.

"Mars, we need to kill these two fish in the shortest possible time, then take out their entrails, and then put the white salt you spoke of into their bodies, and seal them with the bones and the thin skin. ”

"Then water the skins with fresh water so that they don't dry out and harden. ”

"About half a day in a row will be fine. ”

Lawrence told the Mars method.

Now he knew that the salt he ate was actually wrapped in the body of this fish.

And I also understand why Lawrence said before he said that he would wait until he needed to do it.

This process is a waste of time and a waste of fresh water.

That's why Lawrence doesn't do this all the time.

But now, since Mars wants to learn, and Lawrence also has the basic resources, then go and teach.

"Father, will this take so long?"

"Well, be patient!"

Mars didn't expect such a waste of time, and if he could, he would be able to purify the sea salt now.

Because all the trees on the island that were not transplanted were replaced by Mars.

There are many things that are related to wood, so there are two types of substitution options at once.

One is the wood products mentioned earlier, and the other is paper.

This paper is not the straw paper that Mars had discovered before, but industrial paper in the true sense of the word.

Therefore, depending on the category, the replacement required will be different.

Mars had all of them replaced, and now he had a lot of gadgets in his grid.

However, at this time, Lawrence taught Mars traditional crafts, so Mars had to learn.

At this time, Mars first got the sea salt that had just been precipitated under the gazebo, and then the two of them quickly and skillfully killed the fish.

Since it is only the internal organs of the fish, it will be very simple.

After the guts were dug out, Lawrence did whatever Mars did.

Now there is a lot of fresh water next to the two of them, and this time it is used exclusively for making salt.

After the fresh water is used, it can no longer be used after it is mixed with sea salt, so it flows into the sea through the sewage channel.

This kind of function Mars has also been done for a long time.

Although most of the time the fish are killed in the shallows, Mars also made a sewage outlet here in the gazebo for convenience.

It's also a little more convenient.

Lawrence cleared the fish's belly with fresh water and then began to add sea salt to it.

The thickness of the sea salt, as Lawrence said, will be filled according to the size of the fish's previous belly.

So when you put the sea salt in it, the fish will look pretty much the same as before.

At this time, the cut part is sewn up so that the sea salt will not escape.

Then it's time to start a new move.

Use fresh water to water the fish filled with sea salt.

This process is to ensure that the appearance of the fish does not dry out.

Time passed, and Mars felt that his patience was running out, but he still had to keep watering his fish.

At this moment, Mars thought to himself, he might as well not catch this fish just now.

In this way, I won't be doing such boring and boring things all the time.

Although he was very impatient in his heart, Mars kept doing it.

It wasn't until the afternoon that Mars suddenly saw that his fish had dried up, and the body of the fish that had been watered was no longer what it was before.

I hurriedly added water a few more times, thinking that it was because I added less water to appear like this.

"Stop, it should be fine, we can take out our salt now. ”

Mars heard Lawrence's words, and only stopped, then looked at his father's fish, and found that it had completely become a dried salted fish.

And after not watering it, it will be visible to the naked eye to dry out.

Mars carefully held the fish in his hand.

The fish has hardened, especially very hard.

At this time, Lawrence brought a stone basin where the salt was stored, grabbed the head of the fish with one hand, and the tail with the other, and then with one force, the salted fish was directly broken in half.

The original white sea salt inside is now all black.