The principle of the pendulum clock is simple, there are two main parts, one is the spring that provides power to it, but the process of releasing the force of the spring cannot be uniform; So the second key part, the pendulum, is needed. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Galileo discovered that a pendulum is isochronistic, that is, the time it takes for a pendulum to swing from one side to the other and the time it takes to come back is basically equal. As a result, the long-standing problem of how to control the uniform release of the mainspring was solved.

Wang Mai didn't know the name of the person who invented the pendulum, but he had to say that the person who used this principle to make the pendulum was really a genius. He added an escape wheel to the pendulum, so that with each swing of the pendulum, the gear controlled by the escape wheel connected to the mainspring released a tooth, and mankind entered the era of precise timekeeping.

When I was a child, after seeing the principle of the pendulum clock in a popular science book, Wang Mai took advantage of the family's time to go out and dismantle the old pendulum clock at home, and was almost beaten to death by his parents who came back.

Now Wang Shichong ordered that the production of the pendulum clock must be completed as soon as possible, and a large bell tower that can be seen in Luoyang should be built in front of the Ziwei Palace outside the main hall of the palace, and the sound of the bell must resound throughout Luoyang. If you can't do it, you'll be dead this time.

The eunuch who will be the prisoner is surnamed Wang, and he knows that Wang Mai is carrying the emperor's order, so he does not dare to slack off: "If the young eunuch Wang has any requirements, even if he speaks, the whole prison will definitely fully cooperate." ”

"Thank you for the correction."

Wang Mai was not polite at all, and asked for all the craftsmen needed for the best blacksmiths, carpenters, and goldsmiths in the prison in one go, and for the sake of his own safety, he still had to complete Wang Shichong's task first. As for how much of a role this pendulum clock can play for Wang Shichong, he can't care about it for a while, and if his life is gone, there will be nothing.

I also asked Wang Shichong for a will, and invited all the skilled craftsmen who cooperated with him last time. As the saying goes, once born and twice cooked, these people will definitely be able to start a new business much faster than they have their first experience.

Sure enough, it only took more than a month to basically complete the design of this huge pendulum clock, which naturally benefited from the opinions of various skilled craftsmen in the prison.

In the imperial city, Wang Shichong personally met with Wang Mai, and after listening to his explanation, although he seemed to understand or not, he still expressed his appreciation for Wang Mai: "Dazheng Guoqing and other capable ministers, I am very relieved." ”

The two eunuchs bent down and laboriously carried away a box of blueprints, only to hear Wang Mai say: "Your Majesty has just seen the drawings, and one of the most important materials is clockwork. ”

Wang Shichong still had some impression of the clockwork, coiled together in a circle, a bit like a pan incense, nodded and said: "Listening to what Qing said just now, the pendulum clock can move because of this clockwork." ”

"Yes, Your Majesty." Wang Mai took out a proclamation from his sleeve and handed it to both hands, "But the clockwork must be made with the help of a waterwheel on the side of the Yellow River, so I beg your majesty to allow your ministers to build an iron casting workshop by the Yellow River." ”

Wang Shichong took the proclamation and finished reading it, the eunuch next to him attached it to his ear and said a few words, Wang Shichong nodded while listening, and after listening, he said: "In this way, the thin iron sheet required for this clockwork needs to be made with the help of a waterwheel. ”

In addition to serving Wang Shichong's diet and daily life on weekdays, this eunuch also plays the role of secretary. What he said to Wang Shichong just now was to mention his experience in the White Horse Temple and confirm the matter to the emperor.

"Can this be done at the Luoshui Edge?" Wang Shichong asked. He didn't want to deliberately make things difficult for Wang Mai, but because the Tang army was about to attack, and he was afraid that once Wang Mai made a mistake, the matter of setting the clock would be ruined.

"Your Majesty, although it is the flood season now, the flow of Luoshui is too slow, and I am afraid it will be difficult to meet the requirements."

Wang Shichong nodded: "Since this is the case, then implement this matter as soon as possible, but there are quite a lot of Tang Army spies outside the city now...... Anyway, I will send a battalion of men and horses alone to protect Qing's thoughtfulness. ”

"That's not necessary," Wang Mai denied, "The minister is only afraid that the tree will attract the attention of the Tang army, so let's try to keep a low profile." ”

"Aiqing has a point." Wang Shichong looked at Wang Wheat appreciatively. This person is young, so thoughtful, and has a good relationship with the Wang family, but he is a rising star who can focus on cultivating. Thinking about the fact that this person was imprisoned last year because of Luo Shixin's matter, he was wronged a little, and when this major event is completed, he must be rewarded to eliminate the previous mustard.

Out of the imperial city, Wang Mai breathed a sigh of relief, and the stone hanging in his heart was finally put down. Wang Shichong agreed to the request to build a workshop by the Yellow River, which meant that, at least for this time, he had the right to come and go as he pleased.

Luoyang is now under full martial law, and even the woodcutters who go out of the city to chop wood are strictly interrogated, and the officials cannot go out of the city without permission, which allows the imperial decree to enter and exit Luoyang, at least in case of accidents, can still retain a trace of vitality.

The happiest thing is still wealth, and after having this right, he, a spy of the Tang Army, can unscrupulously follow Wang Mai out of the city to transmit information for the King of Qin.

After leaving the city, taking advantage of the busy efforts of the craftsmen, Wang Mai found Yan Qinli, who had been on the outskirts of Luoyang.

Seeing Yan Qinli's current appearance, Wang Mai was a little sad, after being famous, he actually worked in the fields like an old farmer in the countryside. The figure that was not fat was now skinny, and his complexion was tanned, and at the age of thirty, his face was wrinkled.

Yan Qinli was very happy to see Wang Mai, and wiped the beads of sweat on his forehead: "Brother Jikai, why are you here?" ”

"Brother Qinli, why are you bothering? Let the tenants do these field things. ”

Yan Qinli smiled embarrassedly, revealing two rows of white teeth: "I borrowed the money from Brother Jikai many times, I'm afraid I won't be able to pay it off in my life......"

"Brother Qinli...... Wang Mai choked up a little, and hurriedly controlled his emotions, "I said a long time ago that Brother Qinli doesn't have to return these silver coins, but I owe you more." If it weren't for the words he said at the beginning, Brother Qinli wouldn't have ......"

"Why did Ji Kai say this?" Yan Qinli shook his head, "Tao Li doesn't say anything, and the bottom is self-contained." It is Qinli's luck to be able to meet a friend like Brother Jikai. Now that I have figured out the way of what you said about the separation of traits, I promised you to give you the theory you have studied, and now I put it on my bookcase, but it is still a little short. ”

"Brother Qinli, the battle of Luoyang is imminent, I hope you will temporarily terminate your research, or rush back to Chang'an to study now, it is not safe to stay near Luoyang." Wang Mai advised.

"I also heard that the war in Luoyang is about to start," Yan Qinli said, "but this season's crops have just emerged, and I am really reluctant to ......."

"Brother Qinli, save people and lose land, and people and land are both saved; Saving land and losing people, people and land are lost. Wang Mai had to bring out Taizu's theory again.

"It makes sense...... Although Yan Qinli is stubborn, he is not pedantic, and after thinking about it carefully, he said, "Jikai, I have always had an idea in the next place, I hope you can support it." ”

"Brother Qinli, but it doesn't hurt to say it."

"I want to go to Hainan Island."

"What?" Wang Mai looked at him incredulously. In this era when there are no flying cars, no highways, and no diesel engine ships, Yan Qinli actually wants to go to Hainan Island? Even if everything goes well, I'm afraid I won't be able to reach it in a year and a half, this person is really stunned.

Yan Qinli smiled and repeated his words again.

"But the land of Hainan is a long way ......"

"Walking without stopping, lame turtles for thousands of miles; Tired of the soil and not giving up, the hills and mountains are chongcheng. No matter how far the road is, there is no need to be afraid. ”

"But Hainan is a land of miasma......"

"Following what you said about it, it's like spring all year round, and it's not a place of miasma."

"But ......"

"I am determined to study agriculture in this life, and if my brother refuses to support it, I will go on foot." Yan Qinli's face was resolute.

"This ......," Wang Mai began to seriously consider his way to Hainan. Now it is a troubled time, the army is in chaos, and there are wars everywhere, but as a descendant of his face, he doesn't have to worry that those warlords will embarrass him. I'm afraid that I will encounter robbers and bandits on the road, and I am afraid that it will be difficult to walk by land. Then I had to take the waterway, and let him bring some money on the road.

"Brother Jikai......" Yan Qinli saw that Wang Mai was thinking and hurriedly woke him up, "I don't know what Brother Jikai wants?" ”

"Okay," Wang Mai straightened out his thoughts and said, "If you want to go to Hainan, you still need to take the waterway." First take a boat to Jeju Prefecture, which is still safe, and then hire more people to go to Langya to take a boat to the sea......" He told him the route he had just thought about, and explained the matters that need to be paid attention to on the way.

"So thank you Brother Jikai." Yan Qinli was overjoyed when he saw that Wang Mai was willing to help him.

"No thanks, although the sea route is safer than the land route, but the sea is very windy and rough, and one is not careful...... Brother Qinli still needs to think carefully. Wang Mai still doesn't want him to take risks, no one knows what Hainan is like now, I'm afraid that only when he goes to Lingnan will people know. However, the land of Lingnan is very far away from the current traffic conditions, and Hainan is called the end of the world.

"I've made up my mind."

"In that case, then I will arrange for you to take a boat to Jeju...... "In fact, if you want to go to sea, taking the Beijing-Hangzhou Canal is a closer route, but the current Huainan generation Li Zitong, Du Fuwei and Xu Yuanlang are intricately powerful, and bandits are rampant, and it is far safer to go to sea from Langya, so they abandoned this shortcut.

He also asked Yan Qinli to bring a letter home to Licheng's grandfather along the way, explaining that he had married in Luoyang, hoping that his old man would take back his life and put away the family affairs at home.

Yan Qinli naturally did not agree, and said that he would definitely visit his old man when he arrived in Jeju Mansion.

"Brother Qinli, I don't know when we will be able to meet again, the emperor lives up to his wishes, I only hope that you can achieve something as soon as possible."

"Sadness and sadness are parting, and happiness is a new acquaintance. Jikai and I are each other's confidants, which is enough to offset the sorrow and resentment. When you go to Hainan and meet in the future, it must be a day of full harvest. ”