The portable magic tower of the Three Kingdoms

"Speaking of which, has anyone in the army suffered from heat stroke recently?" Liu Tao thought for a while.

"Not for the time being, after all, there is an arrangement for rotation, and at the same time let the soldiers drink some water." Lu Yan shook his head. After all, it is close to the Qinghe River, and it is easy to get water.Even in the evening, many soldiers would swim in the Qinghe River to cool off.

"Shall we go swimming too?" Liu Tao thought for a while.

"Brother, we have to study now." Lu Yan solemnly reminded.

"It's just that the inside of the tent is a bit stuffy. The roof is not insulated at all, and it gets even hotter after being exposed to the scorching sun." Liu Tao was really hot, "By the way, can you bring me some saltpeter?"

"Brother is in good health?" Lu Yan became a little concerned when he heard that, after all, saltpeter is mainly used for medicine these days.

"Of course I'm fine, saltpeter is useful for something else, help me collect some, the more the better." Liu Tao replied.

Lu Yan felt a little relieved when he heard the words, and then went out and ordered the soldiers to collect them, and he had to buy a few feather fans by the way.Now in the wild, there is no way to get saltpeter.If you want to do it, you can only go to Quzhou City behind you to see the situation.

Now that I have gone all the way, it is also considered a way to get some feather fans and come back.

Calculating the distance of fifty miles, it took almost an hour for the fast horse, but in fact it was faster. Two hours before and after, the soldiers had already returned, bringing back two bags, and returned the change.

He ordered someone to send a fan to Lu Zhi, and then Lu Yan brought the fan and saltpeter to Liu Tao.At the moment, the latter's feet have been soaked in the wooden barrel, which is filled with water, and the effect is mediocre, at least it can cool down.

"Brother, the saltpeter you asked for has already been brought back. It's just that time is running out, and the soldiers only found half a catty." Lu Yan handed the package to Liu Tao.

"Half a catty is enough..." Liu Tao immediately put down the scroll in his hand when he heard this, and smiled at Lu Yan, "Bring another bucket of water here, and I will show you a spell that is not a spell!"

"Oh, brother learned new spells again?" Lu Yan was curious.

"Spells... are definitely not that easy to learn." Liu Tao was a little embarrassed, "But what I want to do now is not magic, but science!"

Chapter 142 Saltpeter Ice Making

"Science, what does science mean?" Lu Yan heard this word for the first time.

"Science..." Liu Tao thought for a while, and he knew the orthodox explanation, but it involved some special terms, such as 'objective things', which needed further explanation, so he thought about changing the term.

So after thinking about it carefully, he explained: "It is based on a testable basis, to explain the knowledge of the formation and operation of all things in the world... Canshan, you should know about the knowledge of things in "Book of Rites·University", right? "

"Yes, investigating things, extending knowledge, sincerity, righteousness, self-cultivation, family harmony, state governance, and world peace are the common goals of our generation of scholars." Lu Yan nodded.

That being said, hundreds of years later, the first four have been forgotten, leaving only the four of self-cultivation, family harmony, state governance and peace... Liu Tao couldn't help complaining.When encountering something that doesn't make sense, either throw it to "God's punishment", or "respect ghosts and gods and keep away".

"In simple terms, science is actually the process of investigating things and extending knowledge. In fact, I admire Xunzi in this regard." Liu Tao said casually, "But don't tell others."

"Well, I understand." Lu Yan was also taken aback for a moment, then nodded to express his understanding.

Xunzi's theory was not mainstream in the Han Dynasty.In particular, Confucianism intends to put a layer of shackles on the neck of the monarch. The relationship between heaven and man, the three cardinal principles and the five constant principles, and the rain in the sky can make the monarch lose his virtue.

Talking about materialism to them at this time is basically a 'class enemy'.No, the descendants of Xunzi, the Xunshi of Yingchuan, probably spread the theories about their ancestor Xunzi secretly within the clan, and they dare not talk about it publicly.

Liu Tao said that he admired Xunzi, but he could do it in private, but he couldn't say it publicly, otherwise he would be finished.

Not long after, a soldier brought over a bucket of water.Liu Tao took the saltpeter powder and came to the bucket, smiled at Lu Yan and said, "Now, let us witness the miracle moment of science!"

After finishing speaking, he poured the saltpeter powder into the water, and poured a whole bag of half a catty saltpeter powder into it.Then I found a wooden stick and stirred it in it to make the saltpeter and water fully mix.

In this way, slowly, some fog appeared in the bucket, and the fog became more and more. About 10 minutes later, Liu Tao lowered his head and knocked on the bucket, and the water inside had completely frozen.

"According to this standard, about four taels (Han Liang) is about the same, there is no need for so many..." Liu Tao got up and looked at Lu Yan, "Or we should find a value, roughly how much water and how much saltpeter can be combined. ice."

"........." Lu Yan hadn't reacted yet at the moment, the whole person was frightened by the scene in front of him.

It was just a bucket of water, but it turned into a bucket of ice on such a hot day, it was unbelievable!

"Returning to the soul!" Liu Tao stretched out his hand and patted in front of him, Lu Yan finally came back to his senses.

"Oh? Oh...brother, what did you say just now?" Lu Yan asked with some embarrassment.

"It's rare to have ice, why don't you enjoy it?" Liu Tao pointed to the ground, "It's okay to eat it directly, but for the sake of safety, it's better not to try it lightly. But it's so cool, and it's comfortable to read around here. "

"Brother, is this ice still edible?" Lu Yan couldn't believe it.

"Eating it is said to be harmless to the body, but if you add half a catty of saltpeter, the taste may not be much better. It seems that there are also rumors that it will cause diarrhea. It's hard to say...but eating so much ice, most people will also have diarrhea." Liu Tao. After thinking about it, he said.

"Forget it..." Lu Yan hesitated a little after hearing the words, but in the end she still didn't dare to try.But having said that, it is really enjoyable to be able to lean next to this bucket of ice on such a hot day.Even the surrounding temperature dropped slightly.

"Speaking of..." After being immersed in it for a while, Lu Yan came back to his senses, "Why does the saltpeter melt into the water and make the water freeze?"

"It seems that after the two are mixed, they will absorb the heat in the water, and the heat in the water will be absorbed, and then it will solidify. In fact, if you look carefully, there is still some saltpetre in it that has not been fully integrated into the water..." Liu Tao pointed out He pointed to the barrel.

Lu Yan took a closer look and found that there was some saltpeter powder under the ice surface of the wooden barrel.Thinking of Liu Tao's self-talking remarks earlier, he nodded: "No wonder my brother said that only four taels are enough."

"Conversely..." Liu Tao pointed to the wooden bucket, "As long as you dry this bucket of ice, you will still get similar saltpeter. Although it is a bit more troublesome, it can actually be used repeatedly."

It is difficult to say whether it can be obtained by boiling salt. After all, if it is iron or metal utensils, it is worried that it will react after heating.To be honest, Liu Tao's chemistry and even physics scores are really not that good.

"Is this what brother calls science?" Lu Yan looked at Liu Tao.

"Strictly speaking, this doesn't count..." Liu Tao thought for a while, "After all, we need to understand the existence of 'temperature', and then we need to understand what factors make it absorb heat from water after saltpeter dissolves into water. make the water freeze."

After a pause, he said solemnly: "Explore and verify, can accurately prove and stand the test, instead of thinking about the laws of everything in the world by means of conjecture or speculation, it is science."

"In "Xunzi", there seems to be a similar idea." Lu Yan thought for a while.

"If you want to talk about "Xunzi", what I admire the most is actually the sentence 'Heaven has permanence, it does not exist for Yao, and it does not perish for Jie'. The alternation of the sun and the moon, and the transition of spring, summer, autumn and winter, should be natural phenomena. And it will eventually solve the mystery." Liu Tao looked at Lu Yan, "It's not the concept of 'the king loses his virtue, or XX loses his virtue'."

"The problem is that there is no way to say these words publicly." Lu Yan persuaded.

"Of course I know this..." Liu Tao was really annoyed when he said this.

Confucianism set up the relationship between heaven and man, in order to have a chance to attack the emperor, or even a certain political enemy, in terms of morality and public opinion.After all, the greatest ideal of Confucianism is to 'govern with the emperor's bow', and it is good to give all the power to them.

But the problem is that one or two come from the family, and they advocate "family country and world". How can they take care of the people when their own family is not full?Then something went wrong, and the people complained. Immediately, there was a "Heaven and Man Induction", saying that "the king lost his virtue" and asked the emperor to take the blame.

As for the emperor is gone, that's okay, if someone else is the emperor, the iron-clad Confucian emperor, just play with someone else.

The problem is that under such rules, Liu Tao's remarks are equivalent to making enemies with Confucianism and most of the aristocratic families.Scientific theories can't be played, even if Confucianism is forced to be speechless, it's useless, others can spray him to death with saliva.

This is also the reason why he is eager to change the rules, or become a rule maker.He really doesn't have the time and energy, mainly because he doesn't have the patience to play the art of compromise slowly with all the aristocratic families, masters of Confucian classics, and Confucian scholars.

"It's just the ice..." Liu Tao pointed to the bucket.

"Brother, it's okay to follow the rules." Lu Yan said with a smile, "Brother accidentally discovered the method of condensing water into ice, which relieves our army from the summer heat. how?"

Chapter 143 Lu Zhi Decided to Siege the City

"Although following this method is the most ideal, if we continue like this, we will become accustomed to and rely on this method..." Liu Tao shook his head, this method is indeed very convenient.

It's just that this convenient method is aimed at 'subjects'.If he only intends to play this trick, then just be a "big man loyal minister" obediently, there is no need to re-establish the rules.