I saw Wu Decai open the box he was carrying, and pounded the fish, shrimp and crabs he had taken, and then pounded the water for a while.

Everyone also guessed that it must be being tested, but they didn't know how to test it, so it seemed that they were still making a fuss, and in the end, Wu Decai came to the conclusion after being busy for a while: non-toxic!

Fish, shrimp and crab are non-toxic! The river water is also non-toxic! The lunch meal is also non-toxic! Oranges are also non-toxic! How did people get poisoned?

Feng Manlou suddenly fell silent, thinking carefully, if no one poisoned him, how could he be poisoned to death, and everyone knows that this is obviously a symptom of arsenic poisoning.

Arsenic, the main ingredient is arsenic trioxide, by the way, it must be like this!

Feng Manlou suddenly said: "it, mix the meat of shrimp and crabs with oranges, and test it after a while to see if it is poisonous!" ”

Everyone was stunned, didn't you just say that it is not poisonous, how can it be poisonous?

However, the magistrate has orders, and Wu Decai can only do it! After a while, Wu Decai inspected and said, "Non-toxic!" ”

Innocuity?! Feng Manlou said affirmatively: "There must be, maybe it's because the time is not enough, maybe it's because you haven't tested it." Find a dog and give it a try! ”

Where can I find this? Although there is one on the construction site, Wang Qiong is used to take care of the construction site, after all, she is still worried that someone will steal tools at night!

Wang Qiong seemed to be ruthless all of a sudden, and said: "Wait a minute, adults, go down and find a dog to try!" ”

It is more important than a dog to clear the innocence of his mine.

After a while, Wang Qiong pulled the dog over and threw the food that had just been mixed to the dog, only to see that after it had eaten, after a while, it lay down flutteringly, and after a while, he closed his eyes.

Wang Qiong tried for a moment and said, "My lord, this dog is dead!" ”

He's dead?! It's really poisonous!

Feng Manlou said: "Everyone has seen that oranges are non-toxic, shrimp and crabs are non-toxic, but when the two are mixed together, they are poisonous." And the dog was poisoned by these two things! ”

Nawen was startled and said, "It's okay, it's good that I didn't eat oranges just now, otherwise it would be the same as a dog!" ”

Wang Ying has also learned a lot of knowledge since following Feng Manlou, this time, it seems that there is a mystery hidden in it, and asked Feng Manlou: "My lord, how do you know that these two things are poisonous mixed together?" ”

Feng Manlou said: "It's very simple! Shrimp and crabs, these soft shells, are rich in arsenic pentoxide, that is, arsenic pentavalent state, this arsenic pentoxide itself is non-toxic! Oranges, on the other hand, are rich in vitamin C, which is soluble and non-toxic. However, it quickly reacted with arsenic pentoxide and reduced the pentavalent arsenic to the trivalent arsenic, that is, arsenic trioxide! ”

Wang Ying was stunned for a moment, obviously didn't understand, not only Wang Ying, everyone didn't understand, but heard Feng Manlou continue: "And this arsenic trioxide is the main ingredient of arsenic, so the poisoning symptoms of the deceased are exactly the same as arsenic poisoning!" ”

Everyone seems to believe it or not, but in the experiment just now, everyone has seen it, although they don't know what arsenic trioxide and arsenic pentoxide are, but they also know that if the two things are mixed together, they have a poisonous surname!

Wu Decai asked unwillingly: "My lord, how did you use a silver needle to pierce the stomach to test it, but you didn't find the existence of arsenic?" ”

Feng Manlou said with a smile: "The arsenic we know now is actually not of high purity, and some sulfur is mixed in it, which is the main ingredient of sulfur!" And sulfur and silver will have a chemical reaction to form silver sulfide, silver sulfide is black, so the silver needle will turn black! Arsenic trioxide, on the other hand, cannot react with silver, so the silver needle will not change color! ”

Wu Decai understood, nodded, and said, "Together with the adults, my subordinates have learned a lot of things!" ”

The final investigation showed that Gousheng was not murdered, but poisoned by eating food by mistake, and Zheng Shulin had no evidence of guilt, after all, the orange itself was not poisonous, and Gousheng took it himself.

Wang Qiong is also a good person, so she asked Wencai, who was in the same village as Gousheng, to report back to bring back Gousheng's body. After settling the wages of the dog student, he also prepared a few extra pieces of money and waited for the dog student's family to come.

This can be regarded as a more conscientious proprietor, thinking of the factory owners of later generations, as long as the workers die of illness in their own factories, they will still compensate more or less.

But this owner, although he has also done it, is very merciful compared to the people of this era. Many owners are tired of work, and they don't pull out a dime!

This Wang Qiong immediately won the favor of Feng Manlou. Feng Manlou stopped Wang Qiong and said: "Tell everyone, in the future, these shrimps and crabs must be cooked before eating, not with fruits, in addition, the kitchen meals must be cooked!" Otherwise, something like this would have happened! ”

Wang Qiong agreed, and hurriedly went to the kitchen to inform him. But I saw Zheng Shulin come forward, knelt on the ground, kowtowed to Feng Manlou, and said: "The villain thanks the adults for saving his life, thank the adults for clearing up the villain's grievances, otherwise the villain will definitely suffer from prison!" ”

Feng Manlou hurriedly helped Zheng Shulin up and said, "Master Zheng, please get up quickly!" Investigate the case and return your innocence, this is the duty of this official! Actually, this official came here today to ask you for help! ”

Zheng Shulin immediately said: "What do you command, even if you say it, the villain will try his best to complete it!" ”

But when he saw Feng Manlou, he smiled and said, "Follow me!" ”

Feng Manlou walked directly to the quarry, pointed to these limestones and asked, "I don't know Master Zheng, can you grind these stones into very small particles?" ”

Zheng Shulin shook his head and thought to himself, isn't this crazy?

"How small can that be?" Feng Manlou asked.

Zheng Shulin said: "This limestone is very hard, only with a hammer to knock it!" ”

Feng Manlou didn't speak, looked at the quarry, because he often hit stones, these stones fell a lot of small particles, Feng Manlou couldn't help but smile when he saw this.

"Quick, find something to put all these tiny particles together!" Feng Manlou instructed Xue Ba. looked at Sun Hu and said, "You go and get a few of them, wait for these packed pieces of minc, and get some clay and mix them together!" Mix it up for me! ”

Everyone doesn't know what Feng Manlou is going to do, in fact, Feng Manlou is going to do experiments, tests to produce cement.

The production of cement is divided into dry and wet production, and Feng Manlou decided to use the dry production test first. The process is to grind limestone into very small particles, then mix it with clay and add some ground iron ore and coal to make raw meal!

Of course, the specific process, Feng Manlou can't remember clearly, these are still in the chemistry class of high school, the teacher took everyone into the laboratory to do, what cement, lime, and black bread, and soap, etc., of course, the laboratory is a little different from the industry, therefore, Feng Manlou will take this as an experiment!

When it was almost dark, Feng Manlou would mix these things well, and then give them to Zheng Shulin for him to keep!

Wang Qiong couldn't help but ask Zheng Shulin, "Master Zheng, what does this Wind Lord want to do?" ”

Zheng Shulin said: "Owner, I don't understand either, I just do it." Do you want to say to Lord Feng, don't delay our lime kiln! ”

Wang Qiong thought for a while and said, "Forget it, it won't delay anything anyway." As for the lime kiln, you can pay attention to it. ”

Zheng Shulin agreed, wondering what Feng Manlou was going to do.

The next day, Feng Manlou arrived at the lime kiln site very early, but saw that the materials had been mixed, and asked Zheng Shulin: "Master Zheng, where is there an iron mine near here?" ”

Zheng Shulin was stunned for a moment, this wind lord finished tossing here, and he was going to the iron mine to toss, but this iron mine is not so tossed, the salt and iron of the Great Song Dynasty are all monopolized, and the iron mines of the entire Great Song Dynasty are not **ten!

Zheng Shulin said: "My lord, I don't know what to do with iron ore? ”

Feng Manlou said: "Grind into small particles and mix them with these!" By the way, what about the coals? "Stone coal is the coal that later generations said, but the people of the Great Song Dynasty used to call it stone coal, because it was collected from the ground, so it was called stone coal! And the charcoal is still very precious, lime kilns like this are just a little stock, and most of the time the lime is burned, all of which are made of wood.

Zheng Shulin said: "We don't have an iron mine in Yuhang at all, but earlier, the villain used to work as a coolie in the iron mine near Bianjing, and he can distinguish the iron ore, which is in the small river below the hillside, but there are not many of them, and they have to be picked slowly, and the iron in it, even if it is burned, it is not much!" ”

When Feng Manlou heard this, he said, "It's good, don't be so much!" Go, take me! ”

On this day, Feng Manlou took four guards and had another busy day, and he also got some of Wang Qiong's coal and made the first batch of cement raw materials!

Feng Manlou decided to use the dry test, so that it would be relatively easy! That night, he handed these to Zheng Shulin and said, "Now that I have memorized these recipes, I will give them to you now and cook them for me!" ”

After finishing speaking, Feng Manlou, who had been tired all day, went back with four guards, but saw Feng Xiaoyun greet him at the gate of the yamen and said, "Young Master, I finally looked forward to you coming back?" ”

Feng Manlou patted the dust all over his body and said, "What? I've been busy these days, so I haven't paid attention, what's the matter? ”

Feng Xiaoyun said: "The young lady is here, I have been waiting for you for a long time!" ”

"What is she here for?" Feng Manlou asked.

Xiaoyun said: "I don't know, the little one doesn't dare to ask!" The young lady asked the little one, what have you done. The little one didn't know how to say it, so he said it truthfully! ”

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