It was already dark. Yan Jue was summoned to the palace with an empty stomach. He felt a little resentful that Li Er was not considerate.
The sky was dark, and the road was even darker. If it weren't for the torch, they would have walked into the ditch.
Many people in the Great Tang suffered from night blindness. They could not see in the dark because of a lack of protein and other nutrients.
Eating more eggs and adding more protein would improve the situation.
After a few thunderbolts, the autumn wind blew, and the air became much colder.
The eight giant tallow candles in Taiji Palace were blown in by the wind from outside the palace. Under the light of the candles, there were a few uneasy faces.
Especially Li Er and Zhangsun, they were afraid that Yan Jue would calculate some bad news.
"Langya County Marquis Yan Jue greets Your Majesty.”After bowing, Li Er quickly walked down the hall. There was a table in the hall, and on the table were sixteen copper coins and a turtle shell.
Li Er pulled Yan Jue's wrist and said,""Marquis Yan, I know this is wrong. Doing this will harm my beloved minister's body and violate the laws of heaven. However, I feel uneasy. Twelve lightning strikes struck Taiji Palace in a row. I think the heavens are dissatisfied with my actions and sent down a drought lightning to warn me.”
Empress Zhangsun was only twenty-nine years old. She was dressed in a phoenix robe, which made her look beautiful. The loose robe made her look charming. She carefully examined Yan Jue and then nodded repeatedly.
Under the burning gazes of the ministers and Li Er, Yan Jue smiled bitterly and said,""Your Majesty, please spare me. If you do another divination, this day next year will be my death anniversary. Moreover, what does the lightning strike of Taiji Palace have to do with Your Majesty?”
"How can it be unrelated?" Li Er said anxiously. It would have been fine if the heavenly lightning had struck any other place, but it struck Taiji Palace, my Conference Hall.”
Yan Jue sighed." Sigh, Your Majesty, I have to explain to you. Gold, silver, copper, and iron being struck by lightning is a common natural phenomenon."”
"Natural phenomenon? What do you mean?"
" Your Majesty, I've studied astronomy. Wind, rain, thunder, and lightning are also within my knowledge. The thunder and lightning go to high places and strike metal objects such as gold, silver, copper, and iron. Taiji Palace is the highest place in Chang 'an City, and the eaves are made of bronze. It would be strange if it was not struck by lightning.”
The few of them looked at each other. Li Er sucked in a breath of cold air."Lightning strikes gold, silver, copper, and iron? But why did news occasionally come to Chang 'an that a big tree in the forest had been struck by lightning, causing flames to soar into the sky?”
Yan Jue wanted to roll his eyes, but in order to survive, he dismissed the idea and said,""Your Majesty, it's natural for the trees in the forest to be struck by lightning. Moreover, it wasn't dry lightning that struck the trees. There was no rain to touch the treetops, so the possibility of lightning striking the trees was very small. Gold, silver, copper, iron, and water can conduct electricity.”
"If you don't believe me, when the weather is clear, replace the eaves of Taiji Palace and the other palaces with wooden or pottery products. Then, get a ten-meter long spear and insert it into the mountain behind Xuanwu Sect. I guarantee that Taiji Palace will never attract lightning in the future.”
To put it bluntly, they lacked a lightning rod.
Li Er was surprised and dumbfounded. Wasn't this a punishment from the heavens?
Empress Zhangsun nodded and said," Your Majesty, I agree with what the Marquis of Langya County said. Your Majesty governs the civil and martial arts world and loves the people like his own children. You must always be on guard against any mistakes. Why does such a wise ruler always strike Taiji Palace? It seemed that what Marquis Yan said was not wrong. It would be better to do as he said after the weather cleared up. If what he said was true, His Majesty would not have to worry and blame himself for the Taiji Palace being struck by lightning every time.”
Li Er nodded and said," Yes, the Empress is right. When the weather is clear, replace the cornice of each palace. It's really disturbing to see the thunder rolling in summer and autumn. Marquis Yan has done a great service by solving this matter. I will reward you."”
"Fuji, Xuanling, it's getting late. Why don't you eat in the palace before leaving?”
Fang Xuanling and Zhangsun Wuji took their leave. Li Er did not let Yan Jue leave the palace. After the two of them left, Li Er chuckled and said,"Marquis Yan, it's already late. Stay in the palace and have a long chat with zhen tonight. Zhen will immediately arrange for the Eastern Palace to be set up. Tomorrow, after the morning court session, we will return to your Langya Marquis Mansion.”
Yan Jue nodded bitterly. Li Er was really torturous.
To be honest, Li Er didn't want to let Yan Jue go back yesterday. He wanted to learn more about other subjects from him. After hearing about various subjects yesterday, Li Er had a strong interest in these subjects. It was better to seize the opportunity today to learn more about them.
He had a meal with Li Er and Empress Zhangsun in Taiji Palace. He didn't know the taste of the food. He ate a few mouthfuls and was not even 30% full.
In Taiji Palace, Zhangsun was brewing tea. Li Er smiled and said,""Marquis Yan, please taste the tea that the Empress personally brewed.”
Yan Jue's expression changed. This was poison. He would not drink it. He smiled bitterly and said,"Your Majesty, this lowly official has followed master everywhere since young and is used to drinking master's tea. Although the empress 'tea is good, it doesn't suit this lowly official's taste.”
Li Er gloated." I can only say that you're not lucky enough to enjoy it. Marquis Yan, I'm very interested in the subjects you mentioned yesterday. There was limited time yesterday. Could you briefly explain to me what chemistry and physics are tonight?"”
Yan Jue knew that he would have to pass this test sooner or later. It was not easy to catch a talent. Li Er would not give up until he squeezed your talent dry.
Yan Jue had no choice but to say," Your Majesty, chemistry is actually very simple. Sixty percent of the salt-making technique is chemistry. Chemistry is a subject that studies the nature, composition, structure, changes, and the laws of change of substances. If you want to explain it, it will probably take three to five months to explain it. You have to go through a system to explain it. For example, silver will change color when it comes into contact with some toxins. This is a chemical reaction.”
Yan Jue said with some disdain," It's ridiculous that since ancient times, people have used silver needles to test for poison. However, the poison that the silver needles can detect is limited. Choline can also turn the silver needles black. Some chemical poisons cannot be detected by silver needles.”
Li Er's expression was a little ugly. This was how his personal guard tested the poison. For his own safety, Li Er needed to investigate this matter clearly, so he asked,"What is Chosen?"
"Your Majesty, the egg yolk contains Chrysanthemum. If you don't believe me, you can find a boiled egg and test it with a silver needle.”
Li Er didn't believe it and immediately got someone to find a few boiled eggs and silver needles. Under his curious gaze, Yan Jue peeled off the egg shell and inserted the silver needles. In less than ten seconds, he took them out. As expected, the silver needles turned black.
Li Er's expression changed drastically. He thought that the egg was poisonous, but Yan Jue chuckled and swallowed the egg that was slightly larger than a quail egg.
"Marquis Yan, you can't."
Li Er was shocked. The silver needle had turned black. What if it was poisoned?
Empress Zhangsun was equally shocked and hurriedly stood up to call for the imperial physician.
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