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Text Chapter 685: Things to make ice

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    As if offering a treasure, the Taoist priest took out an oil-paper bag with three layers inside and three outside from a cloth bag close to his body. There was about half a bowl of white powder in it, which shone under the sun. Wang Kuang looked at it intently.  It turned out that the crystal particles were so tiny that if you didn¡¯t look closely, you would think it was a pile of white powder.

    It happened that that day, Xu Guoxu was also one of the evaluators. When this guy saw it, he muttered: "This seems to be refined salt?" He stretched out his hand to dip some, and wanted to put it into his mouth, but Wang Kuang slapped it away:  "I say you're a foodie, but you really are a foodie. How dare you put unknown things into your mouth? Don't risk your life." The other evaluators covered their mouths and laughed secretly. These days, Wang Kuang is not only  Today, when Xu Guoxu's hand was slapped off, people like Chang Sun Chong and Cheng Chumo took turns joining in the fun as ordinary people and serving as evaluators. Similar situations had happened several times. This was not the first time.  It seems that everyone who is close to Jian'an Hou likes to eat?  .

    Indeed, people who are close to Wang Kuang and who can be recognized by Wang Kuang and accepted into his circle basically come to Wang Kuang. The main purpose is to eat, and other purposes are secondary. They rely on Wang Kuang.  Kuang was not interested in Wang Kuang's other talents, but because Wang Kuang could make the food with one hand.  This purpose is very simple and not utilitarian, so it can be accepted by Wang Kuang.

    Changsun Chong, for example, has become obsessed with cooking since the last time he fried a plate of fresh mushroom cabbage that was barely decent. He would go to Jianlin Restaurant or Wang Kuang's house every now and then.  , and did not ask Wang Kuang to teach him. He watched the masters cooking by himself.  Then I found a place to figure it out on my own. Over the past month or so, my cooking skills have steadily improved.  Of course, this has a lot to do with the fact that the masters, after receiving Wang Kuang's notice and seeing him come to observe, deliberately slowed down their movements until Changsun Chong could see clearly. Sometimes, they even worried that Changsun Chong would not understand.  He also specially taught the chefs and apprentices who had already mastered a certain process step by step and were very skilled in it.

    The Taoist priest originally wanted to wait for Xu Guoxu to make a fool of himself so that he could show off what he had brought, but when he heard Wang Kuang's words, he couldn't help but feel a chill in his heart.  He quickly put away his thoughts and said: "Yes, Marquis Jian'an really thought carefully about it. In this world, there are many things that are specious, but you really can't just taste them casually. It's Xiaodao's negligence." He is obviously a lot older, but he is still  Call yourself a Taoist and put yourself in a very low position, for no other reason than because a certain Taoist priest has been circulating in the Taoist temples near Chang'an recently, just because a piece of thing that looks beautiful but has no use has now become a foreigner.  The professional status of the first-class Sabao Zhuqi.  As long as you take one more step forward, you will become a serious official and Taoist.

    After getting rid of the distraction, he respectfully asked everyone to watch his operation. He first asked for a large bowl of water and poured in a small amount of the powder.  Later, he gritted his teeth and poured it all in carefully. Then he quickly picked up the tea pot in front of Xu Guoxu, put it into a bowl, and stirred it with a wooden stick. It took a while.  Everyone saw that the tea pot gradually began to stop steaming, and then began to freeze.

    Although there is ice in Chang'an now, it has not reached the point where dripping water can turn into ice. If you want to freeze a pot of hot tea, you can't do it without leaving it outside for several hours, and you have to leave it out of the sun.  place to go.  But the scene in front of them subverted everyone's views. This was under the bright sun. How could a cup of hot tea turn into ice so quickly?

    "Tsk, tsk, it's a pity that this is not in summer. If it were in summer, it would be so refreshing to come here." It was Xu Guoxu again, who was indeed a foodie. He first thought of using it to drink tea in summer.  He leaned over and looked at the tea pot that had a thin layer of ice on it, and asked the Taoist priest: "How much of this do you still have? I've bought as many as I can. I'll give you a pound of it. How about it?"

    Wang Kuang smiled, this guy is preparing to go out to sea in the spring. Wouldn't it be nice to take him on the boat and drink a bowl of cold mung bean soup under the scorching sun?  He didn't say anything. He was thinking about what this thing that felt very familiar to him was.  I remember that the chemistry teacher demonstrated this trick to everyone in class in the summer in order to arouse everyone's interest in learning chemistry.  It's just that many years have passed. I was still in the third grade of junior high school at that time. Now, including the time traveled back in time, more than thirty years have passed. I always feel that I am about to grasp the key points, but it always passes in the blink of an eye.

    One kilogram is no longer a small amount. One kilogram of money can support the expenses of a Taoist temple for two or three months. Especially for alchemy Taoist priests, their money is the most tight. If it was before the Jin Dynasty and the Sui Dynasty,  As it became common for scholar-bureaucrats to ask for elixirs and take elixirs, of course they did not pay attention to the money. However, since the emperor issued an edict strictly prohibiting officials from taking elixirs indiscriminately, and the toxicity of Wushi Powder became known to the world, elixir cultivation has gradually increased over the years.  The rate of decline is also very fast. For alchemy practitioners who need a lot of money to support their alchemy, it is undoubtedly adding insult to injury.

    The Taoist priest was very frustrated and said to XuXu said: "Returning to Xu Jiancheng, the Xiaodao was also refined by accident. They are all here, and there is nothing else. Even if Xu Jiancheng you give ten guan per catty, I really can't get even a tiny bit out of it."  . And the formula has not been found yet. Dozens of elixirs and elixir powders were mixed together that day, and I don¡¯t know which ones produced this thing. This needs to be explored slowly. If it takes less than a year and a half, I¡¯m afraid it won¡¯t work.  ." Obviously he also knows the benefits of this thing. He doesn't need to take it, just use it as ice in summer, and it can make him a lot of money.

    Wang Kuang suddenly sniffed and asked: "Among the dozens of alchemy powders of yours, is there saltpeter?" Saltpeter is one of the basic raw materials commonly used in alchemy. Wang Kuanggang smelled it on this Taoist priest.  There was a smell of urine, and although Xu Guoxu was beside him, after Xu Guoxu had a catheterization, like other eunuchs, he no longer had this smell. As for Xu Guoxu, because of the habit he had developed over the years, as long as  If possible, I have to bathe every day and wash my lower body three times a day. It is really tasteless.

    "It turns out that Marquis Jian'an also has some knowledge of alchemy. Oh, damn, the path is too abrupt. Marquis Jian'an knows everything about heaven and earth. How can he go to refine elixirs? It's because Marquis Jian'an is so reckless. Please forgive me for that." This Taoist priest did not agree.  Zhiji never thought of himself as a Taoist from the beginning. Apart from repeatedly claiming to be a small Taoist, he never made any announcement. Unlike other Taoist priests who started their words with "Immeasurable Buddha Life" or "Immeasurable Heavenly Lord".

    "And plant ash?" How can Wang Kuang care about this? He is a Taoist in alchemy, but he is the predecessor of a chemist. These people are treasures. Even if the Taoist priest points at Wang Kuang's nose and scolds him, he doesn't care. Baby  It's too late to protect him, so how can he be willing to punish him?  As long as they don't do anything detrimental to Wang Kuang, that's it.

    "Ashes from plants? There is no such thing, but Xiaodao burned a lot of talisman water in order to ensure that the elixir was formed. I remember there were quartz, Lantian jade chips, pearls, etc., Xiaodao remembered dozens of them.  There are just dozens of things that need to be added or subtracted to try, and if one person relies on the trick, he may not be able to try it out in a year and a half. No, Honglu Temple happened to be recruiting people, and so-and-so came."

    "Haha, there's no need to try. I got it. Guoxu, don't worry for now. When you go to sea, I'll get you a few rocks on each boat to ensure that you have ice available anytime and anywhere." Wang Kuang said happily.  laughing out loud.  While asking the question, he already remembered what it was, potassium nitrate!  This is a good thing. Not only can you use its dissolving and endothermic properties to cool down, it is also a good material for making gunpowder. Potassium nitrate itself will cause an explosion when it is smashed. If other explosive materials are added to it, think about it.  Think about it, put it in a clay pot, how amazing would this power be?

    The procedure for preparing potassium nitrate is actually very simple. It is to mix saltpeter or saltpeter with plant ash, add water, heat at low temperature, replace the sodium ion in the saltpeter with potassium ions in the plant ash, then filter, or dry in the sun, or bake at low temperature.  Roast to evaporate the water, and that's what you get.  The acquisition of saltpeter and saltpeter is relatively dirty. Apart from natural mines, it can only be found in latrines, pig pens, chicken and duck houses. Wang Kuang remembered that if history had not changed, more than a thousand years later, European countries would be fighting for something.  There is a life-and-death fight over the ownership of guano on a small island, because guano is the best raw material for making artificial saltpetre.  To put it simply, bird droppings are very rich in nitrate. After being dissolved in water and then purified, nitrate is obtained.

    But it turned out that he had not forgotten all the chemistry knowledge he had learned. It was just that he had never used it, so it was buried in the depths of his memory. Today, he was brought out by the Taoist priest. Wang Kuang was in a good mood and did not mind the Taoist priest.  With the strong smell of salty earth on his body, he patted his shoulder: "There is no need to take the test. I will guarantee you to teach at the Gewu Academy. You will be under the ninth rank. How about it?"

    The Taoist priest, whose mood suddenly fell to the bottom because Wang Kuang said that he already knew the formula of the few things he had worked so hard to get, and that he could give a few stones to Xu Guoxu as soon as he opened his mouth, was extremely surprised when he heard this.  , originally he thought that he had lost his value and that this trip was in vain. Unexpectedly, Marquis Jian'an gave him the highest grade since the recruitment began, and the only grade of ninth grade. The highest grade before,  But there was an Orion. Because he could lay more than twenty kinds of traps, only a few were discovered by the evaluators, and the rest were not discovered. He was appointed as an accompanying garrison captain from the ninth rank, and later he was responsible for teaching soldiers in the army.  How to set a trap.

    But now he has lost his value, and even he does not know the formula, but he has obtained the ninth rank, and it is a teaching, not an official position of a Buddhist like other Taoists and monks. The reason for this  It's absolutely intriguing.

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