Daqin: When I return from sea, I will offer you a map of the world

Chapter 36 The sun was not very hot 2000 years ago

"Invention and creation are really not something ordinary people can do..." Zhao Si, who was squatting on the ridge of the field in the Lantian camp, sighed.

"What do you mean?" Jing, who was thin and black, asked from the side.

Zhao Si shook his head, just looking at the various crops that had germinated on the ground.

Right now, the weather and temperature are suitable. After more than ten days of planting, all kinds of crops have sprouted.Sweet potatoes, potatoes, and corn are also growing well.Zhao Si took the crew to catch insects and weeds when he had nothing to do.

"It's not interesting, let's feel it!" Zhao Si shook his head and laughed.

In the past few days, military craftsmen have made many small things based on the drawings provided by Zhao Si.

Vernier calipers, files, chisels, miscellaneous gadgets.

It's just that Zhao Si tightly provided a theoretical basis, such as paper or something. The military craftsmen also had no idea. They tried to weave it with hay two days ago, but Zhao Si stopped it in time.

Invention and creation are never accomplished overnight. Without instructions, it requires continuous trial and error, continuous accumulation of knowledge and continuous practice.

It's a pity that Zhao Si himself is not a handicraft expert, so he can't rub various inventions with his hands.

"Let's go! Check out Yanchizi!" Zhao Si got up and patted Jing's shoulder and walked towards Yanchizi.

In order to reduce the cost of table salt, the sun-dried salt method must be used as the main method and the salt-boiled method should be supplemented.

Ancient fuels have never been cheap, especially when used to boil salt, the efficiency is so low that it is appallingly low, and the cost alone is enough to make others feel distressed.

Now the salt pond has been rammed with earth several times, and the inner wall has been painted with clay and then repaired by fire. Now it is smooth and firm, and it is difficult for water to penetrate.

There was a light rain a few days ago, and the salt pond was full of water, but now it has been drained, and the salt pond has returned to dryness under the sun.

Zhao Si jumped into the ten zhang square salt pond, and jumped a couple of times, feeling good.

Of the six salt ponds, the first five are basically ten feet square and four feet deep.

The last salt pond is twenty feet square and one foot deep.

Thanks to his obsession with wild adventures in his previous life, Zhao Si has a strong sense of direction and distance, and he also has the ability to distinguish the weather with the naked eye.

Although it is not sure that it is more accurate than the weather forecast, there are few mistakes.

Looking up at the sky, the sky is clear.

It rained a while ago, and the clouds dispersed a lot, and the remaining clouds also drifted away. There should be no heavy rain near Lantian in the next few days, and the sunshine is abundant, so the salt drying method can be carried out.

"Ready to start work!" Zhao Si clapped his hands, and some soldiers were ordered to carry large chunks of brine.

The brine salt excavated from these excavations was prepared when the salt pond was excavated.

Make sure the weather is good enough to start working straight away.

Water was first poured into the first salt pond, and then the soldiers and the crew joined hands to break up large chunks of brine and throw them into the salt pond where the water was stored.

When it was hard to dissolve in water, Zhao Si signaled to stop.

"Sieve salt water!" Zhao Si ordered!
The soldiers picked up the prepared sieves woven with thin bamboo strips to sift out the impurities in the brine.

After sieving, the cloudy brine, which has been roughly filtered once, is introduced into a second salt pond.

Put in charcoal to start absorbing pigment impurities...

After a long wait, a third salt pool was introduced and manually re-screened again.

After re-screening, introduce the fourth salt pond, put in plant ash, stir evenly, filter and absorb impurities such as heavy metals...

After a long wait, the fifth salt pond was introduced to manually re-screen again, and at the same time, the visible ash impurities were removed.

After that, introduce the sixth salt pond, which is [-] feet square and [-] foot deep. After one operation, it took most of the day's work, from morning to night.The water that was originally full in one pool was only more than half in the last pool.

The cost is a bit staggering, but it is harmless. The raw materials are all inedible brine salt. It is right to turn waste into treasure.

The next step is to wait quietly for the sun to evaporate the water and precipitate the salt crystals.

The sixth salt pond should not be as deep as the first few salt ponds, otherwise the contact surface with the sunlight will be too small, and a lot of time will be wasted.

After everything was done, the soldiers and crew were exhausted, and their clothes were all soaked through, and salt crystals formed on some trouser legs.

Zhao Si sat under the tree and silently observed and recalled the whole process.

"The cost input is worthless brine mines, and the cost of mining and transportation may be higher. The cost of the site is not worth mentioning. The last is the labor cost of manually sifting brine." Zhao Si silently calculated.

"However, in this way, it is estimated that many salt workers engaged in the drying salt industry will suffer from skin diseases." Zhao Si said in a deep voice.

The human body is soaked in salt water with too high concentration all the year round, and one can imagine the result.

"Brother, in this way, just wait and it will turn into salt?" Jing asked.

It’s not that Zhao Si never made salt at sea in the past. After all, this era is full of natives. After going to sea, he has never seen a port. In many cases, there is no trade, and all materials need to be obtained by himself. Zhao Si often boils water directly Salt.

After all, too many people are needed to dry the salt, the process is more complicated, and the time is longer. Zhao Si's crew only totals more than 400 people.

That's why Jing asked the question, because Jing had never seen the method of drying salt.

"You don't have to just wait. The sun dries the water and the salt comes out. If it's cloudy, I don't know how long it will take. If it's raining, it will be even more troublesome. Everything has to be done from scratch." Zhao Si said.

After finishing speaking, Zhao Si looked up at the sun in the sky and cursed.

"It looks quite big, why isn't it hot?" Zhao Si was also from the Central Plains in his previous life.

When that guy is hot, people are almost smoky, and Zhao Si doesn't even know what the spring and autumn seasons are.

After summer is winter, after winter is summer, and the temperature drops and rises suddenly, just like playing.

It can reach forty degrees when it is hot.

Two layers of down jackets are not enough when it is cold.

As a result, Guanzhong in the pre-Qin period was not like this.

Now that we have entered May, it stands to reason that it has entered summer.

But even on a sunny day, the weather is still lukewarm, and it doesn't feel particularly hot.

"It is estimated that the environment is different in different times?"

Zhao Si was puzzled.

The climate difference in the same area over 2000 years is indeed quite large.

But if you think about it, Henan in ancient times was still a land of elephants, with abundant water and grass. The weather in Henan today is just like teasing you. The sky was clear yesterday and tomorrow there will be snow in March, or goose feather snow.

The same is true for the current Guanzhong.

There is no large-scale diversion of the Yellow River, and the entire Central Plains can be said to be the most fertile place in the world that is most suitable for human habitation and farming.

Oh, it is worth mentioning that the current Yellow River is not called Yellow River, but Dahe.

Summer is not too hot, and winter is not too cold.

"In this way, drying salt in Guanzhong is a waste of time."

Zhao Si reckoned that the sunny day would be thirty degrees at most...

"The sun-dried salt method can only be used to digest the local brine salt mines in various parts of the Central Plains. I'm afraid it may not be enough for self-sufficiency. It seems that the big heads still have to fall on the same land." Zhao Si pondered.

The difference of the times is not just the invention of cultural institutions.

And the climate...

Given the overly auspicious climate and huge population in the Central Plains, even with the sun-dried salt method, I am afraid that the local salt production will not be self-sufficient, and it will eventually fall on Qidi.

That place is near the sea, and the big sun is not unreal.

(At first I thought about the whole flower work, but after thinking about it, I am a newcomer at the beginning, so I will follow the plot honestly.)
(End of this chapter)