Hand over the jade seal first [Infrastructure]

The expressions of the little ladies are very indescribable. If you want salt water, why not just use sea water?Why bother?

Someone was surprised and asked directly. Xiao Zirong knew that they couldn't understand, but he still explained: "These waters are different from ordinary water, they are all pure water."

"Pure water?" Ah Yin sat on the ground with her knees crossed curiously and asked, "What is pure water?"

While heating the solution, Xiao Zirong said: "It is water without impurities. The water we drink on weekdays contains some impurities. Of course, some of those things are not harmful to our bodies, and even have benefits. You can’t use that kind of water to extract fine salt, so you have to filter it.”

Aman looked at Xiao Zirong fascinatedly with her chin resting on her face and asked, "Then how do you filter it?"

Xiao Zirong said: "There are many ways to filter, but now we don't have anything in hand, so I only use the simplest one, find sandstone to filter, if... I mean, if, in the wild, there is no condition Ignite a fire to make water, and if the water is dirty, you can find those sandstones and filter the sewage through sandstones, this method is very slow, but the water you get is clean and will not harm your body."

Sandstone-filtered water is a rare and simple way to obtain clean water in nature. Xiao Zirong didn't want to explain too much the difference between pure water, mineral water, and other water, even if he explained it, everyone would not understand.

Not to mention them, even those great Confucians who have read thousands of volumes of books don't understand.

While Xiao Zirong was doing some science popularization with the young ladies, he heated the solution on a high fire until it boiled, then turned to a slow fire and continued heating until a large number of white crystals appeared in the clay pot before stopping the heating.

At this time, the color of the coarse salt had turned a little whiter. Everyone thought that at about the same time, they found that the city lord had dissolved the crystals into the water again, and everyone was stunned.

Liu Cainiang held back for a long time before holding back a sentence: Take off your pants and fart.

Then they saw that this time Xiao Zirong no longer heated the crystal, but poured the water into another clay pot.

The shape of the clay pot is rather special, it is two pots superimposed, when Xiao Zirong pours water from above, the bottom of the pot on top will seep and drip into the pot below.

Liu Cainiang couldn't hold back her curiosity and took a look at it, only to find that there were layers of dark things made according to the size of the clay pot.

She couldn't help asking: "What is this?"

Xiao Zirong explained while controlling the speed of pouring the water solution: "This is bamboo charcoal, which is used for the second filtration."

Liu Cainiang nodded with a half understanding.

In fact, Xiao Zirong knew that it was not suitable to use bamboo charcoal. He should use activated carbon, which is the best choice for absorbing the impurities in the brine solution.

But the raw material of activated carbon is coal, and they don't know where the coal is these days. The most important thing is that even if he can find the exact location of the coal mine, it's useless. They don't have any tools to dig.

So now he can only use bamboo charcoal for multiple filtrations, and it shouldn't be a big problem.

After Xiao Zirong filtered the solution little by little, he heated the solution again until white crystals appeared.

The salt that precipitated this time seemed to be infinitely close to fine salt. After he collected everything, Liu Cainiang couldn't help twisting a little bit with her fingertips and observed carefully for a while before saying: "The quality of this salt is even better than what we ate before. , City Lord, do you think we should exchange this salt for more salt?"

Xiao Zirong was stunned for a moment: "What? Where did the salt you ate before come from? The quality is not good?"

Liu Cainiang said: "The salt I ate before was also purchased from Liangxiang County. Anyway, it's not as good as this. I'm just going to tell you how long it takes to get the salt? If we want to supply everyone, it requires a lot of manpower and material resources. We It doesn’t need to be that good.”

Xiao Zirong frowned after hearing this: "Don't say that, you follow me, and I will give you the best within my ability, as for the waste of manpower and material resources you said... No, I am doing this now just for Is the idea before the experiment correct? Can refined salt be extracted? After that, I will find a way to create a workshop dedicated to extracting salt, and hire everyone to do it.”

Xiao Zirong didn't think it would be a burden for so many of them to eat salt, especially with so many young ladies, not everyone could farm well. Although everyone would have land, they would not be good at farming. Those who own the land can rent out the land, and then do other things to make money by themselves.

So Xiao Zirong had to provide more jobs. If everyone was forced to farm, he was afraid that some people would starve to death when the autumn harvest came.

As for salt, it is better not to sell it or not to sell it.

Just as the rainy season was over, Xiao Zirong led people to start burning the sand, and then mixed it with the shell powder that had been ground during the rainy season, that is, calcium carbonate, to get lime mortar.

To be honest, before this thing was made, Xiao Zirong didn't have much confidence in his heart. His understanding of cement was made of limestone, and he had never heard of making it with shells.

But since it was mentioned in the book, he might as well give it a try.

He didn't expect to get it, even though it looked different from what he thought, it was indeed lime mortar.

After the first wave of lime mortar came out, Xiao Zirong was very excited. With this thing, the houses they built would be stronger.

The first thing to be built now is the place to refine the refined salt, because they need this thing more now and because they can use this as an experiment first. If the house is built immediately, if something is not suitable, it may lead to disaster.

According to Xiao Zirong's previous steps of refining refined salt, the first thing the salt factory needs is a large boiler and stove.

Fortunately, the stove, the boiler... Xiao Zirong used clay pots in his experiments before, but this thing is definitely not as good at conducting heat as metal. Even if you can't get iron, you should at least use bronze. It is not clear whether the metal aluminum was extracted in this era.

The mud bricks are still used to build the salt factory, with bamboo as the skeleton, and then lime mortar is used as the adhesive and the outer layer is coated.

But this time the roof will not be replaced by leaves.

When digging the salt water pond before, because Xiao Zirong had been writing the basic system and formulating the future direction, he didn't come many times.

The only few times he was blasted away shortly after he did it - the little ladies disliked him for being clumsy and doing it too slowly!

I don't know if this environment appeases these little ladies or if they have been with Xiao Zirong for a long time, they are not afraid of Xiao Zirong, anyway, these little ladies are more powerful now.

Xiao Zirong originally felt that it was not good for him to sit back and enjoy his success, and since the girls were busy, it would be unreasonable for him to be a boy, but who knew he would be disgusted.

Since then, he has never cared about the matter of the salt water pool, even because of the long distance, the little ladies won't let him pass!

Xiao Zirong, who built the salt factory this time, has enough reasons to come here. He actually doesn't have much experience in building houses, but he can cheat.

He can even directly search for the blueprints and atlases of various architectural books in his mind, the geology of the location of the house, the foundation calculated according to the size, and the load-bearing capacity of various materials. Anyway, these messy data are all for him. here.

Xiao Zirong's area for the salt factory was not small at the beginning, and he likes to plan ahead when he is carrying out these infrastructure constructions.

There are not many of them now, but they can't hold back in the future.

In case he really got some male slaves, if there are young ladies who fancy them, they will definitely marry and have children in the future, and the number will increase.

Of course, Xiao Zirong will also control the population. The remnants of the original family say that 300 people lived at the same time.

However, the family gathering place is not the same as the city. Xiao Zirong discovered that the family had a very large garden during the survey before, and that garden was connected to several mountains behind.

Xiao Zirong's requirements for the greening of the city are not that high - they are surrounded by mountains, what kind of greening do they need?

In order to reflect his status, his city lord's mansion was well designed, and he built a small garden, but it couldn't be compared with before.

So Xiao Zirong planned for the city to accommodate 1000 to [-] people, which doesn't sound like a lot of people.

However, if this number is placed in the Western Regions, it is enough to establish a country.

What's more, Xiao Zirong has long thought that if there is not enough space in the future, it will be expanded. If this is the inner city and the outer city, the buildings can be built on the surrounding mountains. If you don't want to build on the mountains, you can just blow up the mountains.

Anyway, he still has a recipe for a big killer in his hand, but Xiao Zirong doesn't plan to take it out easily now except for using it at the robbers.

In this case, the salt factory he wants to build will naturally be able to supply 1000 people. Of course, it will definitely not start at full capacity in the early stage, but all the necessary facilities can be prepared.

Xiao Zirong originally thought about teaching those little ladies how to use lime mortar, but he didn't know how to do it, but he had a wealth of theoretical knowledge.

In the end, he found that he hadn't waited for him to go to class, and he just said a few words, and these little ladies got started very quickly, Xiao Zirong was taken aback by that speed.

Seeing Xiao Zirong standing there in a daze holding a thin clay board, Liu Cainiang couldn't help laughing and said, "It's not the first time building a house, why are you surprised?"

Xiao Zirong looked puzzled: "I know it's not the first time, but that time there were a lot of people and relatively simple materials were used, this time... the speed is too fast, they are really smart. "

In fact, building a house has nothing to do with being smart or not, it is a skilled job, but these little ladies seem to be very skilled, making him wonder if the people he brought out are not ordinary.

Liu Cainiang stood aside and said calmly: "What is this? When we were in the village, we did everything except go out to rob or hunt."

Xiao Zirong turned his head: "Including building a house?"

Liu Cainiang nodded: "Including building a house."

Xiao Zirong cursed secretly, but didn't say anything.

Liu Cainiang's only remaining eye is full of hope and happiness: "Actually, it was not so fast before, but this time is different, everyone is full of energy."

Everyone knows that after the salt factory is built, the next step is to build a house for them to live in. Before the city lord said that they would use this to practice their hands, everyone was of course excited.

Especially after it was built, Xiao Zirong had someone paste a layer of lime mortar on the outside of the mud tiles, and the lime mortar also added the toner left after the firewood was burned, making the tiles black. .

This salt factory is not far from the brine pool. At the foot of the mountain, the back of the salt factory is a green hill facing the sea. There is such a white wall and black tiles between the blue and green, which looks particularly eye-catching.

This house is much better than those temporary residences built with mud bricks. Everyone can't wait to go back and start building houses immediately. The sooner they live in such a house, the better.

Xiao Zirong was not in a hurry, she approached Liu Cainiang and said, "Choose another smart and strong lady, let's go to Liangxiang County."