"Wu Zi, since you escaped with them, what are you doing here with me?" Zheng Sheng asked.

"Zheng Miao's attack this time was extremely ruthless, and he wiped out all the big and small leaders of Xie Yili, and hundreds of capable people were in their pockets." Wu Yunlu looked at him, "I'm here to tell you the news." It's not a pity to die of thanks, but it's the Nanyang refugees under his command. ”

"I'm going to Jingnan, and I'll leave it to you for these delays." He pointed to the children, "Aren't you training in the Boy Scouts?" And they gave it to you. These are also the descendants of some prestigious people among the homeless, and I hope they can help you. ”

"Ye Santong, Sun Zhilong, I took it away. Wei Mo and Fang Qishan, the two of you will be left to be the guards, and take care of the home! ”

"Please take it in." Wei Mo bowed down again, "Zheng Meng killed dozens of people in my Nanyang Dao, I am willing to go to the soup for the prince, and I only hope that the prince will take us to avenge!" ”

Zheng Sheng opened his mouth, but the words of refusal were said: "Okay." I'll take you for revenge! ”

Wu Yunlu came suddenly and walked fast. He left eight people for Zheng Sheng, in addition to Wei Mo and Fang Qishan, there were also six children.

Song Zhi told Zheng Sheng that the kid who stuffed him with the note was also among them.

"Peace." Zheng Sheng asked his name.

The other five children are named Xie Siyi, Ye Jun, Huang Erhu, Woody, and Zhao Xuan.

Autumn has arrived, and the weather has cooled down. Zheng Wen finally found the saltpeter that Zheng Sheng wanted.

"This thing is also known as ground frost, born in a remote corner outside the house in Shudi." Zheng Wen showed a strange look, "The exterior walls of the toilet and kitchen are the most grown. ”

Zheng Sheng almost threw the things on the table, "The outer wall of the toilet room? ”

"Yes! Can this thing really be used to make ice? Can you eat the ice that can be made in this way? Zheng Wen looked strange.

Zheng Sheng poured some powder into a tea bowl, and the water in the tea bowl still didn't change, but Zheng Sheng reached in and felt a different coldness.

"This saltpeter, according to the doctor, is a laxative and cannot be drunk." Zheng Wen persuaded him, "I found someone to try it, this saltpeter water is really cool, but it will really hurt your stomach." ”

Zheng Sheng nodded, he was thinking about the truth.

"I see!" Zheng Sheng stared at the tea, his expression was sudden, he finally remembered the principle of saltpeter to make ice. It was an experiment. After melting various solids into water, the temperature of the liquid changes: increases, does not change, decreases. The principle of saltpeter ice making is that it dissolves in water and the temperature decreases.

"Saltpeter melts into the water and the temperature decreases." Zheng Sheng muttered, "Saltpeter water must not be drunk, so it is the transfer of heat." The low-temperature saltpeter water absorbs the temperature of the clean water and freezes it! ”

Zheng Wen was confused, "What are you talking about?" ”

Zheng Sheng continued to think that since it was the transfer of heat, then there should be two containers, one large and one small, put clean water in the middle, and put saltpeter in the large container.

Zheng Sheng said that he would do it, he found a basin for washing his face, filled it with saltpeter, and put a bowl of water in the basin. Zheng Sheng slowly added water to the plate, and Zheng Sheng added water to a position slightly lower than the mouth of the bowl.

Then wait for a miracle to happen.

Half an hour later, Zheng Sheng looked at the bowl of water with a very low temperature, helplessly, the ice was not made, only a cold bowl and a bowl of cold water were obtained. But that's about it. Sub-zero ice did not appear.

Zheng Wen left Zheng Sheng with a bag of frost brought back from Ba County, and left disappointed.

Zheng Sheng continued to ponder the reasons for the failure. Is the outside temperature too high? But it's autumn now, and it is said that saltpeter ice making is possible in summer. Wrong way? But Zheng Sheng is sure that this should be the most effective way.

That's the equipment. Zheng Sheng looked at the bowl, "Is it that its thermal conductivity is too poor?" Bowls are used for eating, and the worse the thermal conductivity, the better. The thermal conductivity of metals is the best. ”

Zheng Sheng immediately took action. Zheng Sheng looked in the kitchen, only to find that the iron pot used for stir-frying could still be used. Zheng Sheng moved the iron pot and continued the experiment. As a result, the water in the iron pot still does not freeze.

"Isn't the heat conduction of this iron pot still good?" Zheng Sheng thought that this iron pot was made of a few catties of steel that he begged his mother to buy from Xiangyang City a few years ago in order to stir-fry vegetables, and it was the best metal utensils in this era.

"Exchange for iron pots?" Zheng Sheng thought that this seemed to be a way of thinking, and the better the pot, the better the fried dishes should be.

"Or do you want to exchange it for other metal utensils?" Zheng Sheng wanted to exchange it for a special ice-making utensil. Iron pot, it's not in a hurry yet.

Zheng Sheng asked someone to bring him some iron ore, and then he successfully exchanged a container with a diameter of twenty centimeters, a meter long, and a container wall about one centimeter thick with an open end and an end sealed, and then Zheng Sheng filled it with water and put it into a tank. Fill the tank with a lot of saltpeter around the perimeter and pour water.

Zheng Sheng waited for another half an hour, and Zheng Sheng took out the pipe. The cold touch made Zheng Sheng shiver. He slowly pulled out the "tube", and the container was empty of water and full of ice......

Saltpeter has made ice, but it seems to be useless. Because now the summer is over.

The construction of the western camp is partially completed, and the playground and six-person dormitory for 30 people in the Tiger Guard camp have been completed.

The day-to-day activities of the Tiger Guard Camp were transferred to the western camp. The annex became a place to study in the Wenwu camp.

In August and September, with the completion of Zheng Sheng's secret room passage, he could go directly from his bedroom to the first house on the west side of the courtyard from the secret passage.

Zheng Sheng stored the paper he had transported from the manor into the room. Zheng Zi paper that was exchanged, Zheng Sheng also put it there.

Wei Mo and Fang Qishan lived in the other two houses on the west side and were responsible for the protection of that house.

Zheng Sheng plans that all the exchange items in the future will appear there.

In two months, the Tiger Guard Battalion finally became proficient in military training. Standing upright, I was able to hold on for half an hour, turning neatly, running and shouting slogans.

In the Wenwu camp, a child named Xie Siyi was added, who was a descendant of the homeless Xie Yili. Zheng Sheng didn't embarrass him, he passed Qiu Chudao's test and entered the civil and military camp.

At the same time, Wang Jun, Wan Yun, and Zheng Shang gradually showed their learning ability to be one level higher than other students.

Qiu Fuzi also gradually adapted to his teaching mode of extracting a passage from the classics, explaining its meaning, and extending it from there, and then telling a lot of great truths.

Zheng Sheng's mathematics course became a discussion class between him and Qiu Fuzi, and Qiu Fuzi would often hold on to Zheng Sheng's novel "point of view" and ask many deeper things.

As for the miscellaneous classes, the nature seems to have changed as well. What was originally a profound intellectual enlightenment turned into a bragging lesson for Qiu Fuzi about his travels in his youth.

The story told by Qiu Fuzi is roughly as follows: When Wu and Shu were still alive, I used to travel to Hanzhong and Jiangxia. I have seen Jiang Wei, the general of Shu, and had a close exchange with Lu Kang, the general of Wu......

What a brag without a draft!

And at this time, in a banquet in Nanyang City, a kind of exquisite Zhengzi paper appeared, which aroused the pursuit of literati and ink writers in Nanyang County......

Zheng Zizhi, in September of the seventh year of Taikang, won the first battle.