Silver needle testing is one of the methods commonly used by the ancients.
The poison referred to by the ancients mainly refers to the highly toxic arsenic, namely "three, oxygen, chemical, two, arsenic". The ancient production technology was backward, resulting in a small amount of sulfur and sulfide in the arsenic. When sulfur comes into contact with silver, a chemical reaction occurs, causing a layer of black "silver sulfide" Ag2S to form on the surface of the silver needle.
However, in later generations, the technology for producing arsenic was much more advanced than in ancient times. The extraction was very pure and no longer mixed with sulfur and sulfide. The chemical properties of silver metal were very stable and would not react with arsenic under normal conditions.
And who is Wuhan University? Wuhan University is a traverser and a high-achieving science student. He knows the principle of silver needle poison testing more clearly.
Eggs are naturally non-toxic, but the yolk of the egg contains a lot of sulfur, and the silver needle will naturally turn black when it "inserts, enters, and goes".
However, for many poisonous items, such as toadstool (a poisonous mushroom), the silver needle will not show a black reaction when it comes in contact with it.
Therefore, silver needles cannot identify poisons and cannot be used as a tool for drug testing.
But even so, they still scared Tian Xie and Li Xin.
If Wu Da was really poisoned to death, then the fun would be great. Wu Da took the two of them with him on this trip, and they would have nothing to pay for their crimes.
They stared at Wu Da for a long time, until they finally determined that Wu Da was still not flushed or panting, and there was no sign of poisoning, and then they barely breathed a sigh of relief.
Li believes in evil or not, took an egg, inserted the silver needle, and went in. After seeing the blackening, he hesitated for a long time before he looked like poison and swallowed the egg with a generous attitude. Into the abdomen.
After a long while, he confirmed that he did not have the poison, and looked at each other with Tian Xie.
In any case, the two of them couldn't figure out why this was. Didn't they always use silver needles to test poison before? What is going on now? This is simply subverting their common sense!
Even the girl Yuanyuan was very scared, but Jinlian, who had long been accustomed to the magical methods of Wuhan University, had a calm face, showing the calmness of the mother of the family.
Wuhan University didn't bother to explain so much, it was the business to wait for his son to eat.
The food in the inn is not comparable to that of the palace, because they are all boiled, not cooked in oil.
However, even so, everyone still ate a lot.
No reason, I'm hungry! When you are hungry, everything tastes delicious!
After eating, everyone began to rest on their own, but Li Xin went out to inquire about the news and stayed in Tianxie next door to guard the Wuhan University family of four.
…
When Wuhan University wakes up from sleep, the sky is already dark and the lights are beginning to come on.
Standing in front of the window and looking at it, the lights of Wanjia are very spectacular.
Liangxiang County is indeed not the original shabby county seat. Due to the ties between Wuhan University and the place, a large influx of wealthy merchants, and the large-scale construction of workshops in Yanyun, Liangxiang County has become more and more prosperous. At night, it was still busy.
There was a curfew in ancient times, but that was the dynasty before the Song Dynasty.
Although the people of the Song Dynasty are miserable, but in fact, the big powers and dignitaries have indeed begun to vigorously develop commerce. To a certain extent, the credit can not be denied.
The Song Dynasty was an era of great development of the commodity economy in ancient China. Its total economic volume far exceeded that of the Han and Tang Dynasties, its culture was prosperous, its thoughts were open, and its foreign exchanges were active.
Before the Song Dynasty, there was indeed a "curfew" system in all dynasties. During the Song Dynasty, the "curfew" system collapsed and a bustling night market appeared.
It was not until the Yuan Dynasty that the "curfew" was reinstated again. After nightfall, the forbidden bell rang, which meant that residents were not allowed to travel, drink banquets, or light the lights.
The crudeness of the Yuanren governance system. The cultural level of the monarchs and ministers of the Yuan Dynasty is not the same as that of the Song people. This also makes the Yuan people unable to inherit the developed and sophisticated governance system of the Song Dynasty. In other words, from the perspective of our later generations, the simple government of the Yuan Dynasty cannot be used in history. Organization of social and economic reforms during the transition period.
Xiao Wuzhe is still young and likes to watch the excitement everywhere. Besides, Jinlian and Yuanyuan also want to go out, so Wu Da took them and Tianxie out of the inn.
Tian Xie whispered to Wu University: "Li Xin came back before, and has already inquired clearly. Recently, Liangxiang County was closed and only allowed to enter and not to leave. It was indeed because a chivalrous man was born and his martial arts was not allowed. Low, he specializes in fighting injustices, beats up a lot of dudes, is good at making swords, and is called'Sunset'. His origin and birthplace are unknown. Li Xin has already gone after him."
Wu Da nodded faintly, smiled, and continued to accompany his wife and children to the night market.
According to common sense, this kind of trivial matter is not the turn of the North Yan Wang from Wuhan University to personally intervene. The reason is that the yamen arrested quickly took over, but since they ran into it, it was okay to investigate.
If you really are a chivalrous man who is righteous and brave, it's okay to help him; but if you are a man who slanders the market under the guise of righteousness, then naturally you should give him a little color, and then quietly throw it to the yamen for processing.
There were many names in ancient markets, including direct market, prison market, meat market, military market, palace market, and customs market; according to the operating hours, there were 4 types of morning market, big market, evening market, and night market.
"Smoke cages, cold waters, moon cages, sand, nights at Qinhuai, near the restaurant. The business girl does not know the hatred of the country, and she still sings "Hou, Court, Flower" across the river.
The poem "Bo Qinhuai" by the poet Du Mu depicts the night market scene of the Jinling Qinhuai River in the heyday of the Tang Dynasty.
Now it is the Northern Song Dynasty. After Wuhan University settled in Yanyun, it was the first to focus on the development of business. The night market in Yanyun is naturally even better.
Although in the current year and month, there are not many types of goods that hawkers can sell, but even so, Jinlian and others are still very happy.
Especially Wuhan University personally paid for a few small pieces of jewelry for Jinlian and Yuanyuan, which made them very happy.
Naturally, these jewelry can not be compared with the jewelry of the palace, but the palace's jewelry is all given by others, and these are bought by Wu Da personally for them, and the meaning is naturally different.
As for Xiao Wuzhe, he was holding a bunch of candied haws and chewing, his teeth were already sour, his little cheek twitched, but he still couldn't put it down, looking at that posture, he would definitely finish eating.
In the middle of the county seat, some people are singing big plays, juggling, and marrying lanterns.
Jin Lian and Yuanyuan paid more attention to the big show, while Xiao Wuzhe looked at the "fire-breathing" juggler, stunned and admired.
I also take a look at Wu University from time to time. The meaning is very simple, omnipotent dad, you have the ability to breathe fire
The old face of Wuhan University twitched, pretending not to see it, this thing really can't play.
At this moment, there was a commotion among the crowd.
When Wu Da looked up, he saw a young man in white clothes with a saucy and virtuous knife-wielding man, flying along the eaves and flying along the eaves.
Behind him, there are many hunters who know martial arts chasing after him.