Silver needle poison test is one of the commonly used methods of the ancients. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

The poison referred to by the ancients mainly refers to the highly toxic arsenic, that is, "three, oxygen, chemical, two, arsenic", the ancient production technology is backward, resulting in arsenic is accompanied by a small amount of sulfur and sulfide, which contains sulfur and silver contact, a chemical reaction will occur, so that the surface of the silver needle produces a layer of black "silver sulfide" ag2s.

However, in later generations, the technology of arsenic production was much more advanced than in ancient times, the refining was very pure, no longer mixed with sulfur and sulfides, and the silver metal was chemically stable, and it would not react with arsenic under normal conditions.

And who is Wuhan University? Wu Da is a traverser, and he is a top science student, and he knows the principle of silver needle poison testing very well.

Eggs are naturally non-toxic, but the egg yolk contains a lot of sulfur, and the silver needle will naturally turn black when "inserted, entered, and went".

However, many poisonous items, such as poisonous mushrooms (a poisonous mushroom), do not react black when the silver needle comes into contact with it.

Therefore, silver needles cannot identify poisons, let alone be used as a tool for drug testing.

But even so, it still scared Tianxie and Li Xin a lot.

If Wu Dazhen is poisoned, then the fun will be great, and Wu Da will take the two of them on this trip, and they will die without atonement for their sins.

They stared at Wuda for a long time, until they finally determined that Wuda's face was still not red and breathless, and there were no signs of poison, so they were reluctant to breathe.

Li Xin didn't believe in evil, took an egg, inserted a silver needle, went in, and after seeing the blackening, he hesitated for a long time before he looked like he was eating poison, and swallowed the egg into his stomach with the attitude of generosity to death.

After a while, he confirmed that he was not poisonous, and looked at each other with the evil face.

The two of them couldn't figure out why this was anyway, didn't they all use silver needles to test poison before? What's going on now? This is simply subverting their common sense!

Even the round girl was frightened, but Jin Lian, who had long been accustomed to the magical methods of Wuda, was not shocked on her face, showing the calm bearing of the housewife.

Wu Da didn't bother to explain so much, and serving his son to eat was the right thing.

The food in the inn is not comparable to that of the royal house, because it is all boiled, not oiled.

Still, the crowd ate a lot.

There is no other reason, hungry! When you're hungry, everything you eat is delicious!

After eating, everyone began to rest, but Li Xin went out to inquire about the news, and stayed in the heavenly evil next door to guard the Wuda family of four.

……

When Wu Da woke up, the sky had already darkened and the lights were on.

Standing in front of the window, at a glance, the lights of thousands of homes are very spectacular.

Liangxiang County is indeed no longer the original dilapidated county, due to the relationship between Wuda and here, a large number of wealthy businessmen and magnates have poured in, coupled with the fact that Yanyun is already building workshops on a large scale, causing Liangxiang County to become more and more prosperous, even at night, it is still busy.

In ancient times, there was a curfew, but that was in the pre-Song dynasty.

Although it is said that the people of the Great Song Dynasty are miserable, in fact, the major wealthy and powerful families have indeed begun to develop business on a large scale, and to a certain extent, their merits cannot be erased.

The Song Dynasty was an era of great development of the commodity economy in ancient China, with its total economic volume far exceeding that of the Han and Tang dynasties, with prosperous culture, open-mindedness, and active foreign exchanges.

Before the Song Dynasty, there was indeed a "curfew" system in all dynasties, but in the Song Dynasty, the "curfew" system collapsed, and a bustling night market appeared.

It was not until the Yuan Dynasty that the "curfew" was restored again, and after nightfall, the ban bell rang, that is, residents were not allowed to travel, drink and feast, and light lamps.

The coarseness of the Yuanren governance system. The cultural level of the Yuan court and the Song people was not the same, which also led to the inability of the Yuan people to inherit the developed and dense governance system of the Song Dynasty, in other words, from the perspective of our later generations, the rudimentary government of the Yuan Dynasty was simply unable to organize social and economic innovation in the historical transition period.

Xiao Wu Zhe is still young and likes to watch the excitement everywhere, not to mention that Jin Lian and Yuanyuan also want to go out for a walk, so Wu Da took them, as well as the heavenly evil, out of the inn.

Tianxie whispered to Wu Da: "Li Xin has been back once before, and he has inquired clearly, the reason why Liangxiang County has been closed recently, and only access is not allowed to go out, is indeed because there is a chivalrous man, his martial arts are not low, he specializes in fighting unevenly, and he has beaten a lot of gentlemen, and he is good at making knives, his name is 'Sunset', his origin is unknown, his origin is unknown, and Li Xin has already tracked it down." ”

Wu Da nodded lightly, smiled, and continued to accompany his wife and children to visit the night market.

According to common sense, this kind of trivial matter is not the turn of Wuda, the king of Northern Yan, to ask in person, and the reason is to be taken over by the Yamen Catcher, but since he has bumped into it, it doesn't hurt to investigate.

If he is really a chivalrous man who is brave and brave, it is not impossible to help him; But if it is a person who swaggers through the market under the guise of righteousness and bravery, then he should naturally give him a little color to see, and then quietly throw it to the yamen for disposal.

There are many names in the ancient market, including the direct market, the prison market, the meat market, the military market, the palace market, the customs market, etc.; According to the business hours, there are four types: morning market, big market, evening market, and night market.

"The smoke cage is cold and the moon is long and sandy, and the night is close to the restaurant in Qinhuai. The merchant girl didn't know the hatred of the country, and she still sang "Queen, Court, Flower" across the river. ”

The poet Du Mu's poem "Bo Qinhuai" is a depiction of the night market scene by the Qinhuai River in Jinling during the Tang Dynasty.

Now it is the Northern Song Dynasty, after Wuhan University settled in Yanyun, it first focused on the development of commerce, and the night market in Yanyun is naturally more than that.

Although in the current age, there are not many types of goods that can be sold by hawkers, but even so, Jin Lian and the others still have a lot of fun.

In particular, Wuda personally paid for it and bought a few small pieces of jewelry for Jin Lian and Yuanyuan, which made the two of them very happy.

These jewelry naturally cannot be compared with the jewelry of the palace, but the jewelry of the palace is given by others, and these are bought by Wuda for the two of them by himself, so the meaning is naturally different.

As for Xiao Wuzhe, he was holding a string of sugar gourds and gnawing on them, his teeth were already sour, and his little face was twitching, but he still couldn't put it down, looking at that posture, he would definitely finish eating.

In the middle of the county, someone is singing big operas, juggling, and martial arts lanterns.

Jin Lian and Yuanyuan paid more attention to the big play, while Xiao Wuzhe looked at the jugglers who could "breathe fire", dumbfounded, and full of admiration.

also glances at Wu Da from time to time, the meaning is very simple, omnipotent father, if you have the ability, you can also breathe fire?

Wu Da's old face twitched, pretending not to see it, this thing really can't be played.

At this moment, there was a sudden commotion among the crowd.

Wu Da raised his eyes and saw a young man with a knife dressed in white and a graceful and virtuous manner, flying along the eaves and running along the eaves.

Behind him, there are many people who know martial arts to catch fast.