Li Shizhen of the Ming Dynasty wrote the "Compendium of Materia Medica", and the eleventh volume of the stone department recorded in the salt chapter, "The pond salt comes out of Hedong Anyi, Western Xia Lingzhou, and now only Xie Zhou planted it." Pen | fun | pavilion www. ｂｉｑｕｇｅ。 info sparse ground for the furrow, and enclosed it. Drain the water into it, and the color will be red for a long time. When the south wind rises in summer and autumn, it will be formed overnight, which is called the salt south wind. If the south wind does not blow, the salt will lose. It is also avoided to muddy water, silt salt veins, and also. ”

This means that until 1580, the preparation of salt was still based on the southerly winds of salt at the confluence of summer and autumn.

If the south wind is not strong, the salt will definitely fail.

Why? Because "the water is injected into it, the color will be red for a long time", this red salt brine, if it is forcibly drained, it will be the "red salt" with excessive miscanthus nitrate content. Eating it will poison people.

The so-called salt south wind at the intersection of summer and autumn happens to achieve the most ideal gradual process in temperature, which can allow miscanthus and salt to be precipitated and crystallized in layers.

This is the only method of separation that the ancients could find.

In a chemistry lab, the same effect can be achieved by using an alcohol lamp to control the gradual change of the fire temperature. But before the Ming Dynasty, talking about chemical temperature control was tantamount to Chang'e landing on the moon.

Speaking of this insurmountable technical difficulty, in fact, it is understandable why the population of Shennong and the Yellow Emperor era was sparse. Human beings cannot live without salt. Sodium chloride and potassium nitrate could not be separated in ancient times. Eating salt is tantamount to taking poison.

So the ancients ate as little salt as possible so that they could live for a few more years. If you don't eat salt, you die, and if you eat salt, you die. Only by eating less can the destruction of toxins on the body be barely controlled within the critical line that the body can bear.

The salt content of well salt in Sichuan and sea salt in coastal provinces is relatively high, and the nitrate content is relatively low. More health benefits.

It is the only salt solution in the northwest, which is reddish in color and the most toxic.

If the central government resolutely abandons the salt ponds in the northwest and exerts the power of the state to export salt from the southeast coast. Regardless of the cost, we will make every effort to supply the northwest. It's not that it's impossible.

But no one has done this in all dynasties. Fan Zhongyan mentioned this matter back then, but finally abolished it.

Guy because the sea salt of this year also has nitrate poison. How much higher or lower is the nitrate content of sea salt than that of anti-salt nitrate? No one has been able to give an accurate number of years. Anyway, it's all poisonous, and it can be controlled to the extent of slow poison anyway, as long as the taste is lighter, the poison won't kill people after thirty or forty years.

The longevity of the people of the pre-Qin period was only forty, and the life expectancy of the Great Song Dynasty had been raised to fifty to sixty. At this point, no matter how much salt is transported thousands of miles, there is no way to improve it. Life has been rare since ancient times. The difference between dying at the age of forty and dying at the age of fifty is really not too big.

Waste salt solution, spend a lot of money on transportation and post road costs to engage in any east-to-west salt diversion project? It's not appropriate! Very inappropriate! At that time, Emperor Yang of the Sui Dynasty made a fortune all over the world and built a great fortune between the north and the south, which caused chaos in the world and finally overthrew the country.

Waterway transportation and land post roads need to be slowly expanded and improved in hundreds of years. I can't be in a hurry, if I'm in a hurry, it's the fate of Emperor Yang of Sui. Especially the Yellow River can only go to Lingbao Sanmenxia.

Sanmenxia is going upstream, and the boat cannot fly over the Hukou Waterfall in one fell swoop like the carp jumping over the dragon gate of the Yellow River.

The transportation from Mengjin Ferry to Chang'an needs to get off the ship and unload, take a land route, reload the ship at Tongguan Fengling Ferry, and transport it to Chang'an from Weishui. This transfer is extremely costly.

Emperor Taizu of the Great Song Dynasty, after the founding of the country and Kaifeng, did not try to move the capital to Chang'an. Emperor Taizu tried! That is, when the military and civilians of the world were greatly developed, the Yellow River was renovated, and it was renovated between Mengjindu and Fenglingdu, Taizu finally gave up. This cost was too high, and Taizu felt that the harm outweighed the good.

If you want to go west from Chang'an, there will be no luck, and you can only rely on camels and oxen. The cost of transportation will be even higher.

Now this Dr. Wu has been born. In Elder Fan's opinion, this Dr. Wu is actually very stupid and naïve. He was thinking about refining nitrate, but he didn't expect that the significance of refining salt was thousands of times heavier than refining nitrate. Salt is the real lifeblood of the country!

Regarding Yao Pingzhong's question, Fan Da Lao smiled.

"Three Taoist friends, let's take a look at this book."

Two female Taoist priests carried a tray and sent three volumes of small copies of the book to the three important people.

The female Taoist priest retreated.

Lin Lingsu, Liu Qi, and Yao Pingzhong bowed their heads and carefully flipped through the manuscript.

The room was silent, except for the rustling of pages.

Everyone lowered their heads and flipped through them for a while. Still Yao Pingzhong was the first to hold his breath and asked, "Use a linen cloth, wrap charcoal powder, and put it in a funnel, so that you can filter it to get non-toxic refined salt?" ”

Yao Pingzhong's tone was very depressed, obviously thinking it was ridiculous and unbelievable.

Elder Fan smiled slightly, "I sent someone to try, but this method is actually useless." ”

"It's useless to let us see?" Yao Pingzhong grunted and expressed dissatisfaction. But he didn't dare to be too arrogant in front of Elder Fan. Although he complained, he lowered his head and continued to flip through the book, hoping that there would be more to say below.

Lin Lingsu no longer flipped down, and sighed.

"This traversal of people is not very good!" There seemed to be a lot of regret in his tone.

Elder Fan smiled, "This handscroll, when I first got my hand, it was marked that sixteen million people had read it. Lin Daoyou is very reasonable. It turns out that our children and grandchildren after 800 years will not be successful. In this chemistry Dan Dao homework, it is not as good as our ancestors. ”

Lin Lingsu shook his head slightly, "If the Taoist system is not passed on, my generation will also have great guilt." From my point of view, it seems that Mr. Deru should not take pleasure in this! ”

Fan is pure and the word is deed. Of all the people present, only Lin Lingsu is qualified to match Fan Dalao's words.

Liu Qi, who has never liked to speak, finally couldn't help but speak for the first time: "Dare to ask the elder, where did this handscroll come from?" ”

Elder Fan picked up the teacup, took a shallow sip, and said with a smile, "Not long ago, I captured a crossing criminal. The prisoner was carrying a magic weapon by his side, called a mobile phone. There is a huge library in this mobile phone, called the starting point Chinese network. This Tang Biography is the first masterpiece in this library. ”

Liu Qi thought for a while, and sighed, "Eight hundred years later, it won't be enough." But I don't know where this phone is now? Can you borrow it from me? ”

Elder Fan shook his head, "This item has been sent to Ouchi and is now contained in the Cabinet Treasure Building." Even if the official family borrowed this thing, it would not be very impressive. This thing has long since run out of power. ”

Liu Qi showed a look of regret on his face and sighed again. No more talking, lower your head and continue to flip through the book.

Yao Pingzhong asked curiously, "What does the elder mean?" This Dr. Wu's Dan Dao cultivation is actually above this Tang biography author? When this Dr. Wu was captured, did he carry a magic weapon such as a mobile phone? ”

"Wu Dafu's insight is very superficial. According to the old man's view, it is unlikely to surpass Tang Chuan. ”

Elder Fan said thoughtfully, "But I have carefully summarized the confessions of many traversal criminals, and the descendants of these eight hundred years later no longer seem to be dividing Dao subjects according to the old system of three hundred and sixty lines. They have liberal arts, physics, chemistry, and even nuclear physics, where millions of people are killed in an instant. ”

"In my opinion, this Tang biography should be made by literary scholars. What Dr. Wu is talking about is a confidential subject that only a chemistry practitioner can get a glimpse of. ”

"I don't think this Dr. Wu is a serious chemist. Actually, he's a cook. But I don't know why this cook would have an intersection with chemists 800 years later. In fact, this means that the chef must use refined salt. Dr. Wu may not be a reliable chemical scholar, but he is undoubtedly a qualified kitchen warrior after 800 years, and he is better than the Tang Bachelor of Arts in salt refining, which makes sense! ”

Lin Lingsu smiled when he heard this, "So Mr. Deru urgently summoned me to wait just to figure out the mystery of this salt refining, right?" ”

Liu Qi suddenly interjected, "Perhaps, there are also some secrets that are unique to the profession of a chef and bachelor." ”

……