Hygiene has always been a major issue closely related to health.

The people of the Tang Dynasty also attached great importance to hygiene. For example, the Qingming Canal was river water, but the people of Chang'an were only used for cleaning, sprinkling, etc., and the drinking water was all well.

Well water is safer and hygienic than river water, which is the simplest concept.

"Those accumulated rotten things gradually pollute the canal water, and the canal water is soaked from the ground... Let's talk about the source of well water. There are two sources of well water, one is diving, what is diving? That is, the nearby water source is soaked, and the water source here comes from the water source of Qingming Canal..."

Yuchi, feeling uncomfortable without interrupting, Xun Yu suddenly realized, "Sir, the rotten water is immersed in the well, and then those who drink this water will get sick."

Jia Ping'an has always wanted to deal with his fault, but Li Yuanying's reaction was the most active, and he slapped him with a slap.

"I will teach you a lesson on behalf of the sir."

Li Yuanying said it was justified, and when he saw Yuchi Xunyu's face was ferocious, he couldn't help but feel a little regretful.

This silly black boy wouldn't secretly take ruthless attacks on me.

Jia Ping'an nodded, looking at how a certain student was showing off, but secretly hated him in his heart, and was about to turn around and deal with this guy.

"It's actually like this? But... how to prove it?" Some officials raised questions.

Today, Jia Ping'an said that he wanted to solve the root cause of the people's prone to illness, so Li Zhicai sent someone. But Jia Ping'an spoke up and said something they didn't understand, and he was confused when he heard it.

"If the water in the well comes from a ditches, why does it taste different?"

Some of the wells in Chang'an are bitter and some are sweet.

"Because the water passes differently!"

A group of idiots, Jia Ping'an casually fooled him.

The key is...

"Invite Duke Qin to come."

Qin Ping is here.

"Mr. Qin, how are you drinking the water from the well at home?"

"Sweet." Qin Ping said: "I was still young and I was greedy for the summer, so I drank the well water directly. The sweetness made me unforgettable to me. But later it gradually changed and the taste was strange. It has become more and more unpleasant in recent years."

"Those rotten things gradually soaked in." Jia Ping'an knew that it was false, "There are two ways. One is to not drink raw water, which is the iron rule. The second is to disinfect!"

"disinfect?"

Jia Ping'an nodded, "Please look for everyone."

"Spread lime!"

The water in the well was hollowed out, and lime was sprinkled from above. Someone took a look at it. As a result, Li Yuanying, who was sprinkling lime, was a little bigger and actually raised the lime.

"Someone's eyes!"

The official covered his eyes and screamed.

"Come on water! There is water here!"

Wang Zhongliang asked someone to help him over and prepare to wash his eyes with the well water he had dug out.

"If you want him to be blind, just wash it with water." Jia Ping'an looked indifferent.

"What does it mean?" Wang Zhongliang turned around and looked at him.

"Quicklime is highly corrosive and will react strongly when exposed to water and burn..."

These pampered guys have never made quicklime at all.

Jia Ping'an made a handful of quicklime and threw it into a bowl of water.

laugh!

Exhausted.

Wang Zhongliang's whole body became soft, "What should I do?"

"Get the oil."

Doesn’t it smell good when using vegetable oil?

Vegetable oil washed her eyes a few times, and the official screamed: "I must be blind, I'm blind!"

"I can't be blind." Jia Ping'an looked at his eyes, but it was corroded, but it was not serious. It would be fine if he kept for a while.

"Go home to raise it."

Someone helped the official back, and Wang Zhongliang asked, "Why is this?"

"I said..." Jia Ping'an wanted to say it, you didn't understand, but he still explained, "Fast lime will react when it encounters water, releasing a lot of heat..."

The bowl of water is a little hot.

"Then why can it be disinfected?" Wang Zhongliang felt that it was hard to explain.

Jia Ping'an deeply missed those years of learning, "Because many bacteria have a substance called protein, quicklime can not only heat when exposed to water, but also produce strong alkali... Heat cannot be disinfected, but strong alkali can make the proteins of those bacteria inactive, thus completing disinfection."

Everyone looked confused.

Jia Ping'an smiled bitterly and said, "It's not that someone is unwilling to explain, but that it's impossible to explain it for three days and three nights."

"I would like to listen for three days and three nights." An official seemed very interested.

“But you have to learn from the beginning.”

"Yes, I'm interested in learning."

"It's a new learning." Jia Ping'an smiled, "You have to learn from scratch... That's a complete set of knowledge systems. Are you sure you're ready?"

"system?"

This is a strange word.

"Yes, for example, for example, the protein mentioned earlier, the bacteria mentioned, and how quicklime produces strong alkalis."

This is a huge system, and the officials just think it's terrible.

“Is this a new learning?”

"right!"

Quicklime goes down to disinfect and no longer get water later.

"Can quicklime and water be toxic?"

"Another substance was generated in the end, and the well water was washed repeatedly several times."

Three days later...

The wells that were disinfected several times and washed several times were filled with water again.

“The taste has changed!”

Wang Zhongliang took a bite and said in surprise: "Although it still has a bit strange taste, it is a bit sweet."

"Cook and drink."

Jia Ping'an asked someone to boil the well water, then cook tea, and a group of people drank it by the well.

“…Jia Ping'an drank the most.”

Wang Zhongliang also drank a lot, "He just drank soup like a meal and asked someone to add salt."

"It seems that there is indeed such knowledge in the new school." Li Zhi was not interested in the Imperial College, but he was quite curious about the new school.

"Jia Ping'an said that everything has its roots. The water in the well comes from the water underground, and the groundwater cannot be born out of thin air. It all comes from the soaking of rainwater, rivers and sea water. Why are some wells sweet and some wells bitter? One is to look at the source of water, and the other is to look at the way of soaking."

"Those soil and rocks?" Li Zhi figured out this truth. "I remember someone said back then that looking at the clear stream in the southwest, I felt bitter after taking a sip, and then I would die. Later, someone went up and found that there were rotten leaves and colorful stone pestles at the source..."

This principle is understandable at the moment of thinking.

Wang Zhongliang felt that the emperor was so smart, "Your Majesty is wise."

"There are many wells in the palace. Jia Ping'an's method was used to disinfect it."

The emperor is always the one who is most afraid of death. Li Zhi wishes to use quicklime to disinfect his residence.

A disinfection operation was launched in the palace, and quicklime was thrown in. A palace servant shouted, "What a big fish, it's white."

Wu Meili was far away, and Zhang Tianxia reported behind him: "After Wu Yang Bo disinfected, someone immediately bought a house, and the others were still watching..."

"Your Majesty asks you to disinfect the wells in the palace with quicklime, which is to help." Wu Mei smiled, "If they make money, they must remember His Majesty's goodness."

When news of using quicklime in the palace to disinfect wells came, those houses immediately became popular.

"They rushed to buy it. Several relatives came to their homes and talked about their friendship for many years. Aye said that Awen could only make a decision, so they went to ask for Awen, but they were scolded by Awen..."

Yuchi Xunyu looked very proud.

Since Yuchi Gong had a blister last time, he went back to practice.

"My family has sold all the money." Li Jingye was very melancholy, "I asked Ah Weng to keep two houses, and then I will hide the beauty in a good golden house, but the result is..."

He pulled off his clothes, turned around, and saw two purple-red marks on his back.

"Aweng just makes two sticks." Li Jingye sighed and said, "It doesn't hurt at all. I think Aweng is afraid he is getting old. Brother, you said last time that men are getting older and worse, why don't you go and find a few female prostitutes to try it for Aweng?"
To be continued...