"I have also heard of this. It is said that there were gods in the sky at that time. It is said that the old man slept at home with his daughter-in-law..."

"No, what I heard was that the old man peeking at his granddaughter-in-law taking a bath..."

A group of people instantly tilted the building.

Chen Xu knocked the blackboard with a bamboo stick a few times with a black head, calling the group of people back from the gossip story of his father-in-law's removal of ashes.

"Hehe, don't blame me, this incident was indeed very popular at that time!" A group of craftsmen and officials bowed with awkward smile.

"Since everyone is familiar with thunder strikes, I am not willing to talk much about it. There are very few thunderstorms in clear sky. That is another natural phenomenon, but most thunderstorms are accompanied by heavy rain, and they often occur in summer. Thunderfall is not unruly. That is, the places where lightning strikes are generally high in the open places, such as big trees, people or livestock standing on hills, etc. Therefore, when it rains and thunders, it is best not to stand in an open high place or take shelter from the big trees..."

"What the Marquis said seems to make some sense!" A craftsman nodded.

"Go, how come what the Marquis said makes no sense? It must be like this. You can often see big trees knocked down by thunder!"

"Yes, when I was a child, my parents told me not to stand under the big tree when it was thunder and rain!"

A group of craftsmen began to discuss what Chen Xu said again.

Chen Xu knocked on the blackboard a few times again and said, "Jiu said just now that lightning cannot be controlled, but it can be avoided by methods. This Cuju Field is built in an empty place on the south bank of the Wei River. It is surrounded by low houses and trees. Only Cuju Field is the highest, so it is also the easiest to be hit by lightning. Now, I want you to build several lightning rods as soon as possible and erect in the area marked just now. These places should be the fulcrum of the Cuju Field and the place with the most dense steel bars. The structure of this lightning rod is like this..."

Chen Xu said while drawing a schematic diagram of a lightning rod with chalk.

"A five-meter-high iron rod is erected on it, and a two-foot-long conical silver needle is made of silver at the top of the iron rod. The iron rod is fixed with concrete. The lower part is made of iron wire with at least one inch diameter and continues from above the iron rod along the exterior wall of the Cuju field to the ground. Several meters deep are buried underground, and a large piece of steel is connected..."

The structure of the lightning rod is very simple, and Chen Xu finished explaining it in a few words. As for how this method can avoid being hit by lightning, Chen Xu naturally didn't bother to talk too much, and he couldn't explain it clearly. People in this era still had a divine stage, and science needed to explain too many things, and the more they explained, the more problems they had, it was not time to popularize the knowledge of electricity.

After Chen Xu finished the arrangement, the fear and tension that Zhang Cang and Hu Kuan and other groups of craftsmen began to dissipate quickly.

Qinghe Hou is a disciple of the Immortal Family. He said that this method is effective and it is inevitable that it will be effective. As for the principle, it is not too late to ask slowly after the lightning rod is installed. Moreover, everyone is eager to know how these simple iron rods and silver needles can resolve lightning.

Just in the heavy rain, almost everyone saw the horrifying scene of lightning and thunder in the dark above the Cuju Field. If the Marquis’ method does not work, then the huge Cuju Field that cost hundreds of millions of dollars and tens of thousands of labor for more than two years may be abandoned.

Everyone scattered and prepared their own work. Chen Xu also came out of the Cuju field. At this time, the guards had recovered seven or eight scattered horses, put on the carriage and returned to the city.

"Go to the palace first!" After entering the city, Chen Xu thought about going to the palace first to explain to the emperor so that the emperor could feel at ease.

In Zichen Hall, Qin Shihuang had calmed down a lot at this time. He was sitting in front of the desk reviewing the memorials. When he heard that Chen Xu had come, he quickly put down his brush and stood up and walked to the door to greet him.

"It was just a rainstorm that thunders were terrified. I heard that the Cuju venue was hit by thunder and ignited a fire. I was afraid that my beloved will be in trouble. I was relieved to find out that I was safe!" Qin Shihuang held Chen Xu's hand, and his worries were beyond words.

Chen Xu was also moved and bowed: "Thank you for your concern. Your Majesty should not be too concerned about the matter of being struck by lightning in Cuju Field. This is because I was not considering the problem of designing and construction at the beginning. However, I have redesigned a lightning protection device. After installation, there will be no danger of being struck by lightning!"

"Your dear, you can avoid the thunder in heaven?" Qin Shihuang looked surprised.

"Yes, it's summer now, and it's common to thunder and rain. The Cuju Field is empty and built too high, so it's easy to attract lightning. However, it only requires a simple installation. The Cuju Field will be safe in the future. I will never be able to panic again!"

"That's good, but my dear still must be careful not to take risks. The thunder is powerful. When Xianyang City was built, it was hit by lightning, and many casualties were injured!" The emperor breathed a sigh of relief and asked the palace maids to serve tea. After two minutes of chatting between the king and his ministers, Chen Xu stood up and said goodbye and went home.
Chapter completed!