The portable magic tower of the Three Kingdoms

If possible, he hoped not to use this method as much as possible, so as not to trap himself in the end.

After a pause, he looked at the bucket of ice and continued: "Besides, the size of this bucket probably consumes about four taels of saltpeter. The ice produced is enough for about five people at most, and it takes one to two quarters of an hour... …with an army of 2 people, no amount of saltpeter is enough.”

"This is also..." Lu Yan nodded, indeed he had not considered the issue of cost.

The main thing is the method of condensing water into ice, which is too surprising. It feels like a method that surpasses heaven and earth.The moment he saw it, he was thinking, if he used it properly, he might be able to give Liu Tao a wave of prestige.

The key is to be able to help his father, Zuo Feng came to inspect it very strange, after all Huangfusong and Zhu Jun didn't look like the Huangmen passed by.Zuo Feng was dismissed this time, so it's hard to say whether someone else will come to inspect it next time.

Only defeating Guangzong is the key to finally solving the problem.

"Actually, there is a better solution..." Liu Tao pointed to the bucket of ice, "Is it okay to leave it to the teacher to judge?"

"Ha, I haven't considered this issue." Lu Yan was also stunned when he heard this.

As the saying goes, Lu Yan set off on Liu Tao's side, but ignored Lu Zhi's ability and his identity.

A few minutes later, the ice bucket was delivered to Lu Zhi, who looked at the bucket of ice and looked at the two of them in disbelief.

He could tell that this bucket of ice should not have been filled outside and brought over, otherwise it would have melted long ago.The key point is that they are encircling Guangzong City at the moment, and the surrounding area is in the wilderness. Where did the ice come from?

"Where... come..." Lu Zhi was a little speechless. At this moment, his mind was full of the two sentences of 'keep silent about strange powers and chaos' and 'respect ghosts and gods and stay away'.

"It's made by adding some saltpeter to the water." Liu Tao came forward, "I heard an alchemist say by chance before that the weather is too hot recently, and I happened to be free, so I asked Canshan to help me bring some saltpeter back to try."

"Adding saltpeter to the water can make the water freeze?" Lu Zhi was taken aback, but he calmed down a little.It doesn't matter if it's unbelievable, as long as it doesn't have anything to do with gods and ghosts.

"From a visual inspection, four taels, or even three taels of saltpeter, can almost condense this bucket of water into ice. And if the water is dried in the sun, or boiled dry in a clay pot, then you can still get saltpeter, that is to say, it can be repeated. Use it." Liu Tao replied.

"It's just that saltpeter is used less after all. The soldiers I sent only found half a catty in Quzhou County." Lu Yan stepped forward, "Of course, if you look carefully, you may find more..."

If a county only has half a catty, or even a catty, the effect will not be great.Lu Zhi looked at the bucket of ice, feeling a little regretful.

If he could have thousands of barrels of ice like this, he could immediately ask the troops to launch an attack. Among other things, in this hot weather, he could maintain the combat power for at least half an hour.

"Wait a minute..." Lu Zhi thought for a while, "If you don't need to freeze, but only need to lower the water temperature to the point where it is about to freeze, how much saltpeter will you need?"

"About six yuan, I think it's enough." Liu Tao thought for a while, "How much is needed, how much saltpeter and water is needed to lower the temperature, this can only be explored a little bit."

"One last question." Lu Zhi looked at the bucket of ice, "Can you drink the water with saltpeter?"

"I haven't asked the doctor, but it should be fine, but the taste will be slightly bitter, and it is not suitable for drinking in large quantities." Liu Tao replied, in his opinion, the doctor probably doesn't know whether this thing can be drunk or not. How many questions.

"Then go to the medical craftsman and ask. I need to know accurate information. There can't be any sloppy." Lu Zhi ordered. Those who are familiar with him can hear that his current tone is a little bit Little excited.

"Master, it's not that they intend to let the soldiers carry a water bag..." Liu Tao probably knew Lu Zhi's plan.

"If it's ice water, at least it can last for a while. The key is not to frostbite the soldiers. Compared with ice, ice water is more useful. Besides, if you don't attack all the time, the next Yellow Gate may come soon." Lu Zhi sighed.

Sure enough, Lu Zhi was also worried about this issue.Even though Zuo Feng only came for one day and one night, he still noticed some information that should be revealed.Your Majesty, indeed, I feel a little heartbroken about the food and grass spent by domestic funds.

At this time, Lu Zhi remembered, His Majesty, the value of money seems to be stronger than imagined.

The key is that the siege equipment has also been built, but it has not been put into use due to weather problems.

"Master..." Liu Tao immediately expressed his opinion after hearing this, "If it is a general attack, can my troops be allowed to participate in the battle to ascend the city? Although I know that this will have some impact on the distribution of military merits, the key is to defeat Guangzong as soon as possible. .”

"Indeed, at the critical moment, you can't be too particular." Lu Zhi hesitated for a while, and finally nodded in agreement.

Liu Tao and the others came all the way, and their military exploits are too dazzling.If they were the ones who defeated Guangzong, or took the main credit, the school captain below would probably have some opinions.

The Han court is very strict about the promotion of frontier troops, and it is difficult for those who have not made military exploits to be promoted.However, in recent decades, the captains of the northern and southern armies have gradually become places where the children of the aristocratic families are gilded.It's not okay to hang around in the officialdom and eat your own food without caring about others.

Liu Tao and Lu Yan left, and Lu Zhi had already ordered the soldiers to dig a pond beside the Qinghe River.This is obviously faster than barrels.The defective saltpeter is not easy to recycle, but as long as Guangzong can be put down in the First World War, the problem will not be big.

"I feel that this time, I owe Deran a little..." Lu Zhi said with emotion, when he took them as apprentices, he mainly came to study from his hometown, so he had no choice but to accept them.

Unexpectedly, a few years later, Liu Tao would be able to grow to this extent, it is really unpredictable.

"I didn't expect it to be ice water..." Lu Yan wondered if he was too stupid before, because ice water didn't even think about it.

"Indeed, if you carry ice cubes next to your body, it will frostbite your skin, and it's not as good as ice water. It's just that the ice water will lose its effect soon in this hot weather. Soldiers have to adapt to the weather again. During this period, the weather will feel worse than before. Hot." Liu Tao shook his head, he had actually thought about the issue of ice water.

Just like a person who enters an air-conditioned room outside for a period of time and then goes out again, the temperature outside has not changed, but the body temperature still feels that the temperature outside seems to have increased by several degrees...

Come to think of it, at that time, the soldiers should have had a harder time.

However, he did overlook one point, that is, the thieves of the enemy army were in the same environment as them.Moreover, these thieves should have much worse tolerance to heat than regular soldiers.

Chapter 144 Preparations for the General Attack

It is said to be a general attack, but in fact it took more than two days to dig the pond. After all, it must be large enough, and it must avoid four or five hours at noon.By bringing in the water from the Qinghe River, at least a huge pond is made.

At the same time, it took more time to prepare the saltpeter, a full five days, and in the blink of an eye, the summer solstice was over.

"Supposedly Zuo Feng has returned to Luoyang, right?" Liu Tao put on the armor, or forced himself to put on the armor.

The temperature is about 30° to 35°, which is very terrible in the era without air conditioners and electric fans.Originally, it was enough not to wear armor, but wearing armor was already like steaming.Thinking of the way the nails became hot under the sun after a while.

Needless to say, he added: "If someone tells me that I have to wear a suit of armor to go to a decisive battle in this weather, I will definitely think that the other party is crazy!"

"That was also after the sun became fierce." Lu Yan replied, "That's why father asked us to get up at Yinshi to prepare for the general attack at halfway through Maoshi."

The general attack was launched at six o'clock in the morning, the sky was just getting bright, and it was still five or six hours before the sun rose completely and the temperature soared.

Can you capture the city in five or six hours?To be honest, I have no idea. After all, Guangzong is close to Qinghe, and like Quyang before, it has a moat.

It can only be said that fortunately it was not a strong attack at the beginning, otherwise how to deal with this moat would become a problem.

"It's just that I didn't expect that the teacher actually put the excavated soil into the sack by the way. This method of using local materials is really clever." Liu Tao said with emotion.

The most clever thing about Lu Zhi is that he planned to dig the earth to build a pond, and then pour saltpeter into it to create ice water.Rely on ice water to cool down the soldiers and ensure that the soldiers can maintain their state to attack the city.

It's just that I didn't expect that the soil dug out could be used to fill the moat... Sure enough, it was not wasted at all.

"If I'm not wrong, there may be another reason." Lu Yan thought for a while, "When I'm preparing, I think I'll probably know... By the way, brother will also take the lead in the charge this time?"

"No, no, only Shangguan Yu, Liu Ge, and Guan Yu's troops participated in the battle. Zhang Fei led the troops to cruise outside, and it was enough to catch the fish that slipped through the net. I will dispatch in the middle, and I don't need to go into battle myself." Liu Tao shook his head.

If the generals under his command fight alone and are out of his line of sight, the defeated enemy troops will not count as his experience.Similarly, for troops that are not under his command, or troops that are out of sight, magic will naturally not work.

Recently found a remedy, that is to use the 'insight of the wind dragon' to achieve long-distance control.But there is a major premise, he must be in command, and the generals below cannot be allowed to command the troops alone.

After all, he is not confident whether this will cause the magic to fail, and he must 'personally' direct it before proving that there is no problem.Otherwise, it would feel a little too weird to find out that the magic doesn't work, and then ask to take over command temporarily or something.

"It's okay if you're in the middle, but if you can, brother, it's best not to get too close to the city wall." Lu Yan felt a little relieved after hearing this.

At Mao shi, the whole army began to assemble, and breakfast was already eaten, which was richer than usual.