The ornaments sold by the hawkers do not look amazing at first glance, but in fact they contain university questions.

The structure of the porcelain jar at hand is a closed cavity, and the wall thickness is even less than half a millimeter, and it is technically difficult to fire this kind of cavity porcelain, which can be called the crown of ceramics.

The early sonar was based on the principle of a special material cavity drum, and used the characteristics of the sound drum with good absorption and filtering effect to convert it into an electrical signal and feed it back to the screen.

At present, this kind of sound drum can be used to listen to the sound of the ground, and it can be used as a repeater to process into a precision instrument or oscillator, and it is extremely versatile. It can't help but remind people of the Song Dynasty when there was a "listening bucket".

It is stacked on top of each other with two thin-walled ceramic sound drums, one large and the other small, so as to eavesdrop on the sound of the partition wall, and this object also has the same effect. However, later because of the war, the thin porcelain of the Song Dynasty was submerged in history, and later generations have never been able to obtain its subtlety.

Thinking of this, Bai Liyan asked the man again:

"The official asked you, can this thing be made bigger?"

"Yes, but it's easier to break if it's too big, so the small people rarely exchange it for money."

"What is the use of this thing before it is exchanged for money?"

"It is used to catch wolves, the wind is calm and there are no waves on the water, and it can also be soaked in the water and float on the water, hit with a wooden stick, and then the fish under the water will turn over and surface by itself, but the porcelain jar used in the water is slightly thicker, so that it is not easy to break."

"Oh...... I see. ”

"Ground wolf" is a unique animal at the moment, a fat rodent rodent rat family, more ferocious than the bamboo rat, and extremely cunning, huge in size, close to medium-sized dogs, ordinary methods of catching mice, gophers, bamboo rats are difficult to be effective.

But ground wolves are omnivores and eat not only plants but also meat, which is harmful to domestic animals. In addition, the ground wolf has a habit of being easily provoked and launching group attacks, so the attack on livestock will not succeed, and it will inevitably attract more companions to besiege it.

Therefore, it is not only harmful to livestock, but also to young children, and when gathered in sufficient numbers, it can also cause harm to unarmed adults.

For this reason, there are many dogs in the flooded areas of the wolf, and the main world of the wolf is lynx, jackal, wolf, embarrassment, tiger, leopard, etc., as well as burrowing cats.

The drill lynx is a caracal, but it can fart like a skunk, is good at burrowing, has a sensitive sense of smell, has a small body width, and is longer than the goblute mouse, which is the largest world of the goblute mouse, and has the obedience of the domestic cat, and the lynx has no conflict of interest in the biological chain.

Therefore, the bobcat often enters human settlements, and the villagers will also give it some catch and soup, but its stinky fart is difficult for humans to accept.

The gopyote rat's fur is tough and bright, and it is an important fur resource in temperate and cold zones, and its meat can be eaten, which is an important meat protein to improve life.

The oil of the goggle rat is the best animal fat for treating burns, and in addition, Baili Yan accidentally came into contact with the ground wolf and found that the tail tendon of the ground wolf is as slender as the bamboo rat, which can be used to make high-grade surgical sutures without rejection.

Due to various economic values, the killing of goggle rats in recent years has been extremely serious, and after the goggle rat was bitten by a dog, there has never been a rabies attack.

In recent years, due to the large-scale hunting organized by man, the number of gopin rats has decreased, and this kind of sound drum used to listen to the sound is to take advantage of the rampant underground activities of gopin rats, and the characteristics of loud sound, to find their nests.

In addition to this ceramic sound drum, there are also wooden barrels made of cowhide, or bamboo tubes can also listen to the sound, but the effect of ceramic thin-walled sound drums is the best.

Now that the wolves have decreased, there is no use for these tools. The dwindling income has left some hunters and artisans who depend on it to make a living.

As for why the sound drum will turn over when the sound drum is sounded in the water, it is largely because after the sound drum is sounded in the water, the sound waves are amplified to the water through the sound drum, and the density of the water is hundreds of times that of the air, so the frequency of the sound wave changes abruptly, forming infrasound waves, which actually scare the underwater fish to death, or shock to death.

It should be said that this is the wisdom of life summed up by the vast number of working people in the practice of production.

Thinking of this, Bailiyan took a closer look at the sound drum, and it can be roughly judged that the sound drum is not pure kaolin, but also other ingredients.

In view of the fact that this kind of sound drum porcelain tire is thinner, there should be another molding and firing process, and the molding rate is very low, and the price will definitely not be cheap, otherwise Bailifang will not be entangled in such a trivial matter, throw a few copper plates and leave.

Thinking about it thoroughly, Bai Liyan asked the man again:

"If the official expects it to be good, the price of this thing is very expensive."

"Nobleman, you are really an insider, it is very difficult to make this thing, this one is already a loss for eight inches of silver, if it is not for the village to wait for urgent use, the small people can not take it into the city to exchange money, after all, it is a good guy who catches fish and mice, it is a pity to sell it."

As soon as the man's voice fell, Bai Lifang bared his teeth and jumped out to accuse, hurriedly trying to prove his innocence:

"Dad, you see, this person opens his mouth is eight inches of silver, and there are eight inches of silver department stores that can buy a set of fine porcelain, this is not a pit man."

"If you don't understand, don't talk nonsense, you think this thing is easy to come by, Dad might as well tell you that this thing is cheap to sell for 100,000 inches."

Bai Lifang was shocked when she heard the news, and said in a loud voice:

"Dad, what nonsense are you talking about, such a broken thing can be worth 100,000 inches of gold."

"If you don't understand, don't talk nonsense, step back first."

Holding Bai Li Fang, Bai Li Yan asked the man again:

"This brother, you are a citizen of which village?"

"Back to the nobles, Xiaomin is from Chenji Village, and he makes a living from hunting."

"I see...... Since your family makes a living from hunting, why do you make such objects? ”

"Don't hide it from the nobles, this craft is actually not owned by my family, it is another family without children, because my father had a lot of help when he was down, so it was later passed on to my family."

"Is there anyone else who can make this?"

"Yes, there is, because the man also fled for his life from a foreign country, and maybe there are still people in a foreign country. But it's the only one in the neighborhood. The nobleman knows the benefits of this thing, and the small people don't want this money, so they just ask the nobles not to offend the small people. ”

"Hehe, you're smart, you don't want to cause trouble when you see that this official is powerful." Bai Liyan stretched out his hand and took out an inch of gold and continued: "That's it, this is an inch of gold, you take it." After you go back, recruit all the people in your village who can make this thing to the Yongxing Marquis Mansion in Yanling City, and the official will have another important use. ”

"Aha!" The man was taken aback: "The noble man is Lord Yongxing Hou!" ”

"What, this official doesn't look like it?"

"No, no, no, Hou Ye loves the people like a son and is famous, how can the little one receive Hou Ye's heavy money."

"Let you take it, it's really a loss-making transaction to sell this thing for eight pieces of silver, and you can't make a lot of money for an inch of gold. After going back, the skilled craftsmen in the village were quickly recruited to Ben Hou's mansion, and Ben Hou was reused. ”

"But the marquis still doesn't know the villain's name, so he gives a piece of gold, and the villain really doesn't dare to accept it."

"A piece of gold is not worth a few dollars to Benhou, but it is a priceless treasure to you people. You will sell all the tools for begging for life, it can be seen that you want money urgently, take the money back first and get rid of it, and then it is not too late to come to the Hou Mansion. ”

"Master Hou's great grace, the villain is unforgettable. The villain's name is Zhang Zilin, and after completing the urgent affairs in the village, he will definitely come to repay the great kindness of Hou Ye. ”

"Well, let's go."

"Master Xie!"

Zhang Zilin hurriedly put away the stall and left quickly with his belongings. After he left, Bai Lifang was full of complaints and resentment:

"Dad, what's the use of buying such a broken thing for a piece of gold."

"Alas......" Bai Liyan sighed and sighed: "There are some things you don't understand, Dad doesn't blame you, now you don't know the magic of this thing, naturally you don't know the benefits of this thing." ”

"But the child really doesn't see any use for it."

"Forget it, don't talk about it. Walk with your father ......"

"Oh......"

Science and technology first came from the accumulation of rich life experience of the people, and when this accumulation reached a certain thickness, after repeated summaries and discoveries, the knowledge and laws that could be recognized were obtained, which was the early science.

The establishment of a scientific system is also a systematic study based on the experience of a large number of social activities.

However, all the substances in the world have their own scientific laws to follow, and when they are not understood by the world, they become strange phenomena.

Due to the frequent wars and the needs of imperial rule in ancient China, a large number of valuable technical experience and books accumulated over a long period of time were either destroyed in the war or stifled by the emperor, which greatly restricted the foundation of the systematic development of technology.

A drum made Bai Liyan think a lot, and he was even more glad that he had gathered the Ligong faction to help the development of Yongxing City, but it was still not enough.

A large number of crystallization of wisdom created by labor scattered among the people need to be systematically collected and sorted out, and through systematic scientific research, it can be turned into technological creation for our use.

Although he was well-informed in his two lives, when it comes to the next generation, the experience and cognition of his previous life cannot be inherited out of thin air.

Bai Li Yan couldn't expect her children to understand her own thoughts, so Bai Li Fang didn't understand the value potential of the technology that a piece of gold could buy.

After several years of development and orderly planning in the west of the city, Bailiyan has integrated the land purchased in the west of the city and opened up a large number of small and medium-sized markets, which can be rented to hawkers for a long or short period of time at low rents for their livelihood.

This not only improved the economy of the peasants outside the city, but also mobilized the production of small commodities to meet the needs of the market itself, and occasionally made shocking discoveries:

"Fang'er, look at this clay pot, you can see the way out of the door when water is poured from the bottom of the pot but does not leak from the bottom."

"Well, that's true. Dad, why is that? ”

Bai Lifang asked puzzled, Bai Liyan ignored it and asked the peddler:

"How much does this clay pot cost?"

"Eight plant money."

The shopkeeper said, and Bai Lifang was taken aback:

"Other shops only sell three plants for money, why do you sell eight plants?"

"This son, do you see that other families have clay pots that do not leak from the bottom of the pot?"

"Then you can't sell eight plants for money!"

Bai Lifang was unhappy in her heart, and at this time, Bai Liyan took out an inch of silver and handed it to the stall owner:

"No need to look for it."

"Yo, thank you for this noble man."

I want to chat about "Empire Travel" with more like-minded people, pay attention to "excellent reading literature" on WeChat, talk about life, and find confidants~