Daming: I, Yang Xian, really govern Yang!

Because Xu Da's next expedition was already a bright card, Yang Xian and Xu Da began to deduce the upcoming Sino-Japanese war.

Xu Da talked about the various things he experienced during his previous expedition to Japan, and also mentioned the unknown Japanese general who launched the charge at the expense of his own life.

Yang Xian is certain that the next decisive battle will definitely be a naval battle.

The two talked about water battles, landing battles, and various details after the subsequent occupation of Izumo.

Regarding the Japanese nation, Yang Xian obviously had a much deeper understanding of him than Xu Da did.

During this period, Xu Miaoyun came in person to deliver fruit cakes.

Xu Miaoyun peeled two oranges with her own hands, first handed them to Xu Da, and then, as if naturally, she also gave one to Yang Xian.

Xu Da looked at the orange in his hand and suddenly sighed.

Yang Xian was eating sweet citrus in his mouth. He didn't understand why Xu Da suddenly acted like this, so he asked.

Only then did Xu Da explain the reason.

"The most unbearable thing about going to sea is eating." Xu Da picked up the citrus in his hand and continued. "As long as you go out to sea, it becomes a luxury to have a bite of such fresh citrus."

I actually forgot about this incident.

When going to sea in this era, there is not as much rich food as in later generations.

Before the industrial revolution, long-term sea voyages required all supplies to be carried on ships.

And almost all fresh fruits and vegetables have a short shelf life.

Therefore, ships sailing at sea cannot get fresh food most of the time, and they still mainly eat food that can be stored for a long time, such as salted food and grains. If they can be made into semi-finished products, try to make them into semi-finished products, let alone fresh food. , even drinking water is a big problem.

Sure enough, before Yang Xian mentioned this, Xu Da had already begun to complain to Yang Xian about the drinking water problem.

Fresh water in maritime navigation is mainly used for drinking or cooking, and is rarely used for washing. Even drinking water cannot be openly supplied.

"Spooning water does not benefit others, but it is better to be prepared to avoid being stuck for a long time." This is what it means.

After some questioning by Yang Xian, he learned that because the Ming Dynasty navy had no experience in long-distance voyages, in order to solve the drinking water problem, they had specially equipped water ships in the fleet to carry fresh water.

In the original time and space, this habit continued until the time of Zheng He's voyages to the West.

However, Zheng He's voyages to the West were not colonial expansion, and fighting was not the main task. Therefore, the problem of low efficiency of water ships was not particularly prominent.

Now that Xu Da and the others are on an expedition, warship combat missions take priority, so it is obviously inappropriate to use water ships to accompany them in their voyage.

Yang Xian pondered for a while and then said: "You can set up a special water tank cabin on the warship, and supplement it with buckets, so that you can carry a considerable amount of fresh water."

"For example, a warship has four water tanks, four water tanks, and twelve buckets, so it can carry six to seven hundred kilograms of fresh water."

In this way, if we only fight in Japan, it should be completely sufficient, and it will no longer be so stretched during use.

But even so, fresh water is still a precious resource.

If you want to sail longer distances in the future, you will mainly have to rely on the port to replenish fresh water, and then you will have to learn to store rainwater for later use.

If there is an emergency, you can directly use distilled seawater to obtain fresh water, but this will consume a lot of fuel. Of course, these are all things for later. The method proposed by Yang Xian is more than enough to fight a small Japan across the East China Sea.

"By the way, Brother Xu remembered this trip and brought more wine on board." Yang Xian remembered something and suddenly said.

"Drinking is a taboo when marching and fighting. Why did Brother Yang bring so much liquor with him?" Xu Da asked doubtfully.

Yang Xian said: "If fresh water is left for a long time, it will easily deteriorate and even breed bacteria. This means that if the water is left for a long time, it will become contaminated."

"Water will be contaminated after being left for a long time?!" Xu Da said in shock. No wonder some brothers suddenly had diarrhea during the previous voyage. The reason could not be found at the time.

Now Xu Da thought carefully about the several cases of diarrhea among soldiers that occurred at that time. It seems that it was during the time when the ship was about to arrive in Japan and when the return voyage from Japan was about to reach the Ming Dynasty. Didn't the fresh water stored at this time just meet the condition of being left for too long?

Xu Da told Yang Xianyi about this.

Yang Xian nodded and said: "Eighty percent of the reason is because the fresh water has deteriorated. If it is stored for more than a month, there is a high probability that the fresh water will deteriorate."

Water stored for a long time must not be drunk because it may be contaminated by bacteria, dust and other substances, or even deteriorate. Drinking spoiled water will cause certain damage to health. For example, infection of the intestinal tract by pathogenic microorganisms or bacteria may cause gastrointestinal lesions, and may lead to uncomfortable symptoms such as gastrointestinal inflammation, bloating, abdominal pain, or diarrhea.

"The wine stored on the ship can be put to use at this time. At this time, the wine is mixed with the spoiled water. This will improve the taste and sterilize."

Xu Da wrote down all these carefully. After all, it was related to the life and death of tens of thousands of soldiers in the entire army, so he couldn't be careless at all.

"The time for the second expedition to Japan has not yet been determined. If there is enough time, I should be able to bring you a surprise before you set off, Brother Xu." Yang Xian smiled.

Xu Da smiled and said: "That's great. Who in the world doesn't know that everything you take out, Brother Yang, is a treasure."

Yang Xian raised his head and glanced at the sky. It was getting late, so he stopped lingering.

At Xu Da's request, Xu Miaoyun personally escorted Yang Xian out of the house.

Before leaving, Yang Xian took out a pencil from his arms, handed it to Xu Miaoyun, and said with a smile: "Ms. Miaoyun likes to read books, so she naturally writes book reviews on weekdays. This is my latest invention of writing stationery, called a pencil. Just give it to the girl."

Xu Miaoyun reached out and took it.

Seeing that the other party was in a daze, Yang Xian patted his head, forgetting that this was the first time the other party had seen this thing.

So he took it back, took out a knife from his body, sharpened the pencil in his hand, and then demonstrated it again with the void in his hand.

Then he handed it back again.

"Miaoyun thanks Mr. Yang." Xu Miaoyun said.

Now that Xu Da and Yang Xian are brothers, if she continues to call Yang Xian Duke, it will be too alienating. Naturally, she will not agree to call him uncle, so she can only call him Mr. Yang Xian.

Xu Miaoyun had also listened to Yang Xian's open classes at Yangzhou University, so there was no problem in calling him sir.

After saying goodbye to Xu Miaoyun, Yang Xian walked toward the patent office alone.

Then I saw the previous scene between Zhao Dongying and Liu Min.

This is the first of its kind involving a patent dispute.

Therefore, as the chief officer, Zhao Dongying was not sure. He was discussing the details of the case with Liu Min. When he looked up, he saw a familiar figure walking from the yamen in the distance, and his spirits were immediately lifted. (End of chapter)