"My lord, the deceased's purse does contain a fire fold, a handkerchief, a small mirror, a piece of incense cake, two silver tickets, a few pieces of broken silver, a wooden comb, and a few pieces of straw paper, and nothing else. He replied.

Yan Zike stretched out his hands at Young Master Yan Jiu: "Huh." ”

Well, since Wei Chunhua has a fire fold on his body, it is impossible for him to slap the glass with his hand to ask for help because the fire fold given to her by the Min family could not light the cigarette stick.

"I have to find the fire fold that the Min family gave to Wei Chunhua. Swallow said.

"Found it, found it!" As he was talking, he saw that his younger brothers who were salvaging on the pond came back first, and they came into the Xuan with water, throwing down a pile of salvaged broken glass, and another person held a fire fold in his hand, and quickly came over and presented it to Yan Zike.

"Hard. Yan Zike casually changed the chicken leg in the plate to this little brother.

Little Brother: "......"

Yan Zi Ke held the fire fold to Young Master Yan Jiu and Yan Qi to see, the fire fold used by ordinary people is mostly a bamboo tube shell, and the rich and sophisticated people have copper, porcelain and even gold and jade, and the Min family gave Wei Chunhua this kind of fire fold is a brass shell, which is no different from the one given to Qin Zhiyu, but the one that was fished out of the pool water at this time was blown up at the mouth of the cylinder.

"Wei Chunhua has used this fire fold. Young Master Yan Jiu spoke a little faster.

This thing is burning, Yan Qixin said.

"Judging from the situation in which the barrel mouth was blown up, the explosion was caused by the use of this fire fold. Yan Zike hooked the corners of his lips slightly, "Overturning the inference of slapping the glass for help, the reason why Wei Chunhua's face and right hand were the most seriously injured was because when he blew the fire fold with his mouth, the explosion occurred, and one of the three doubts was solved, but the interesting thing is that lighting the fire fold will cause an explosion, how is this done?"

Isn't it really because of a gas explosion or something? Yan Qi put down his chopsticks and began to retrieve the knowledge he had learned in his previous life that remained in his brain, in addition to the gas explosion, under what circumstances would an explosion be caused by an open flame?

No gunpowder was used.

In case of open flame, it explodes.

There are no unwanted foreign objects in the car.

Nine times out of ten, it's a gas explosion.

If the car is full of gas, Miss Wei will definitely look good when she enters the car. In fact, she didn't have any unusual look on her face during the time she got into the car until she entered the water.

Besides, there are ventilation pipes on the roof of the car, even if it was exploded with gas, the unusual gas would have run away from the ventilation pipe a long time ago, how could it stay in the car?

"Then who," Yan Zike called him again, "did the deceased have other wounds on his body besides the wounds on his face and hands?"

He had just finished thoroughly examining Wei Chunhua's body before eating, and he didn't have time to report it, so when he saw his boss asking, he quickly got up and replied: "Back to my lord, the most severe part of the deceased's body is the neck, directly due to the fracture of the strong guide, there are strict internal injuries in the body, I am afraid that the lungs have been ruptured, and there is a lot of internal bleeding......"

Yan Qi remembered that there had been an explosion accident in the city in the previous life, and many people around the explosion site had suffered physical injuries of different degrees, partly because of the high-pressure waves generated during the explosion, such as lung damage caused by the impact of air waves or water waves on the chest.

The high-speed air impact generated by the explosion will throw and impact the human body and act on other objects, and then cause indirect damage to the human body, and all tissues and organs of the human body are unavoidable, among which the air-containing organs are particularly susceptible to damage, such as the lungs.

So - on the premise of being sure that it was not a gunpowder explosion, was it really caused by a gas explosion?

If it's not gas, what kind of gas would it be?

flammable and explosive gases......

Hydrogen.

If it is hydrogen, the explosion occurred in the upper part of the glass car, which can be explained, because hydrogen is the lightest, assuming that the hydrogen is poured into the glass car in advance by the murderer, Miss Wei will put a lot of air into the glass car in the process, so the hydrogen will run to the top of the car.

But there is a snorkel on the top of the glass car, so it can't store hydrogen at all.

Unless...... The snorkel was blocked in advance by the murderer.

The snorkel on the roof of the car is also made of glass, in order to not break easily when driving in the water, the wall of the glass tube is made very thick, so the transparency is not high, and the glass contains a lot of impurities.

Assuming that the premise that the glass tube is blocked is true, then the speculation of water leakage in the glass car is not needed, because once the snorkel is blocked, the oxygen in the car will gradually decrease with Wei Chunhua's inhalation, and after Wei Chunhua gradually feels difficult to breathe, he will naturally immediately use the fire fold to light the cigarette stick for help, so blocking the ventilator is a double benefit, which can not only reduce the air in the glass car, but also prompt Wei Chunhua to use the fire fold.

Then all that remains is the last doubt - how exactly the hydrogen in the glass car is made.

Iron and zinc react with acids, respectively, to produce hydrogen.

Yan Qi thought of the Tianhuo Burning Clothes case on the Shangsi Festival, the ancients already knew how to make acid, not to mention iron.

"It can be seen that Wei Chunhua did die in a man-made explosion," Yan Zikezheng said, "There are three suspects: Min Xuanwei, Gu Shi, and Min Xuewei." From the testimony of the subordinates in the museum, it can be learned that Min Xuanwei and Gu had brought people into the warehouse where the glass car was stored yesterday evening because they were going to have a banquet today, and supervised the subordinates to check the safety of the glass car, but because there were many people present at that time, the two had no chance to do anything, but the two of them each had a key to the warehouse, and it was not impossible to sneak into the warehouse alone when no one was paying attention. The reason why Min Xuewei did not rule out suspicion was because she had the possibility of becoming an accomplice or even mastering it. ”

"After Min Xuanwei and Gu Shi took people to check the glass car, has the door been opened before Wei Chunhua entered the glass car today?" Yan Qi asked.

Yan Zike raised his eyes to look at her, the light spots of the big red lantern under the Xuan corridor jumped in his black pupils, the corners of his lips curled, like a sickle hook to pick open the gauze tent, and put in the clear moonlight of Manxuan, "I have never opened it, at least from dawn this morning until Wei Chunhua entered the car, the door of the glass car has not been opened, I ordered the subordinates in charge of taking confessions to ask the people in the museum." ”

How does this last sentence sound like an invitation to credit. Young Master Yan Jiu raised his eyelids and glanced at his uncle.

Yesterday evening, the Min couple had taken someone to inspect the glass car, and the door would inevitably be opened when the inspection was carried out, so at least at this time, the murderer had not filled the car with hydrogen, and the best time to do it after that was to wait for everyone to sleep after dark, sneak into the glass car in the warehouse, and use the reaction of acid and iron to produce hydrogen.

The glass tank under the permeable layer can hold just the right amount of dilute sulfuric acid!

"Uncle, is the residue you found on the seepage plate still there?" Yan Qi asked.

Yan Zike stretched out his long arm and pinched Yan Qi's face, and then turned it over with his big hand, and there was an extra gray particle in his palm, which was firmly held in front of Yan Qi's eyes.

"Do you have a magnet?" Yan Qi asked again as he pinched the grain in his hand.

"Go and find it. Yan Zike looked at his niece, but the words were said to his own little brother in Xuannei, and he hurriedly responded: "There are magnets under him." As he spoke, he went to the toolbox he brought with him, took it out and handed it to Yan Zike.

Yan Qi took the magnet and compared it to the particle, but found that the particle did not move at all in the palm of his hand - not iron!

If it's not iron, it's zinc. Yan Qi remembered that the reaction speed of zinc and dilute sulfuric acid was faster than that of iron and dilute sulfuric acid, if this thing was zinc, it would be better to ensure that the murderer could get enough hydrogen in the shortest possible time, because the murderer probably did not grasp when he could find an opportunity to sneak into the warehouse where the glass car was stored at night, if it was only half a night, maybe the iron had not been completely "digested" by the sulfuric acid, and the remaining residue would be easy to be discovered, and the time could at least be shortened with zinc- As long as it can be confirmed that this thing is zinc, the inference of using hydrogen explosion to kill people can be established!

"Go to personally ask Lao Cui of the Ministry of Industry to come over. Yan Qi was still recalling the chemistry textbook, her uncle had already ordered to move the professionals, and asked someone to inform the group of people who were eating inside that they could leave the Ziyang Immortal Pavilion, and only the Min family was not allowed to move, and ordered his subordinates to carry out a carpet search inside and outside the Ziyang Immortal Pavilion.

"The focus is on alum oil and this golden thing. Yan Qi added.

"Alum oil?" her uncle looked at her.

Yan Qi remembered the Tianhuo Burning Clothes case again because she didn't tell this person how she learned the principle of the crime, this person had been angry with her for a few days, and she was so arrogant that she was blingbling, if she said the hydrogen production method again this time, would this person come again?

"I have an idea," Yan Qi said, "Let's not say it until it is confirmed." ”

"Oh. Her uncle didn't ask much.

Cui Xi's father came soon, followed by Cui Xuan, shaking a fan in his hand, and when he saw Yan Qi, he narrowed his fox eyes, with a look of disgust of "why are you everywhere".

"What is the Qing Shang looking for me?" asked Cui Chunyi, Master Cui.

The two families of Yan Cui are both world friends and have a good family, so they are called much more intimate.

"Old Cui, come and see," Yan Zike took the metal particle that Yan Qi handed back, and held it in the palm of his hand to show Cui Chun, "Do you know what kind of material this is?"

Cui Chunyi took it and looked at it carefully in front of his eyes for a while, put it under his nose and sniffed it, and bit it with his teeth, and said: "It looks like iron, not iron, like copper, not copper, and some like water tin......"

Water tin is zinc.

"I need a conclusive answer, is there a way to prove it?" asked Yanzike.

"If it is iron, it can be tried out with a magnet, if it is bronze, it will be burned in a smelting furnace before it is melted before the same amount of iron, and if it is water tin, it will be softened by burning it on an ordinary fire for a while. Cui Chun together.

"It's not iron, I've tried it with a magnet," Yan Zi Ke said, "but I can't use your method to try it, there is only such a small thing, and if you try it with it, the physical evidence will be gone." Is there any other way?"

"Wait until I think about it. "Cui Chunyi is a good comrade who loves his job, and when it comes to work, the whole person is burning, and what he thinks is called a full devotion.

was fully enjoying the psychological pleasure brought by work, his broken son suddenly came out from behind him, only glanced at his hand, and said: "This is water tin." ”

"Oh, how can you see it?" Yan Zike looked at Cui Xuan.

"On the fifteenth day of the first month of last year, the Imperial Court Baoyuan Bureau specially made a batch of pure water tin coins for the festival, cast with the words 'Qingxiang Taiping' issued in the city, but Xu is the impression has a problem, which has a batch of money on the word defects, I have always liked to collect coins, specially digging for dozens of incomplete coins collection, it is very playful for a while, I am very familiar with the texture on it, oh," Cui Xuan pointed to the fragment in his father's palm to Yan Zike, "This fragment happens to be the fragmented part of the coin, and the word 'enjoy' is on the top of this' There is a sharp indentation in the mouth, and it is impossible to mistake. ”

"It needs to be compared with the real thing," Yan Zike looked at him, "Can a virtuous nephew carry such a coin on him?"

"Hehehehehe, how could a little nephew put that kind of thing on his body and bring ...... everywhere" Cui Xuan smiled.

In a few years, a coin can be sold for hundreds of taels of silver.

"It's okay, I'll have someone prepare a boat overnight to take you back to Beijing to get it. Swallow said.

"Ah, the little nephew remembered, the little nephew really brought one to the island to ......"

"Go get it. ”

“…… Do you remember to give it back to your little nephew when you look back? Cui Xuan had to go back and get it in person.

"What's the use of confirming this thing?" Cui Chunyi was ruined by his son, so he had to find a place for himself again.

Yan Zike raised an eyebrow and looked at his little niece.

"Uncle Cui, what is the purity of the water tin coins that Brother Cui said?" Yan Qi asked Cui Chunyi.

The ordinary coins minted in the dynasty were made of brass, an alloy formed by mixing zinc and copper, and if the pure zinc coins mentioned by Cui Xuan only contained zinc, it would be a more perfect way to produce hydrogen.

"The purity can be as high as 90% 78. Cui Chunyi replied.

More than 97 percent purity! No wonder it can be "digested" by dilute sulfuric acid to the point that it leaves almost no tail.

It's a pity that people are not as good as heaven, and there is still such a small piece of scum left.

Yan Qi was almost certain that the murderer's murder method was zinc and dilute sulfuric acid to produce hydrogen to cause the explosion, but how could she tell her uncle, and say that it was from that book?

Yan Qi looked at Yan Zike, and Yan Zike was also looking at her.

"The gas produced from alum oil and pure water tin will explode when exposed to an open flame. "Yan Qidao.

"Old Cui," Yan Zike's gaze on his little niece's face did not take his eyes away, but together with Cui Chun beside him, "I need a few things: a well-sealed glass box that can be pulled up and pulled open on one side, a glass trough that can be put in it, green alum oil, and pure water tin ingots - when will they be ready?"

"Don't spindles, pellets. Yan Qi added.

"Give me half an hour!" Cui Chun lifted his spirits and walked out quickly.

In an instant, only the uncle and nephew of the Yan family were left in Changxuan, Yan Zike's subordinates were all sent to search the entire Ziyang Immortal Pavilion, Young Master Yan Jiu sat at the table with his sleeves and looked at his uncle and sister quietly, the night wind swept from the surface of the pool, only a few hairs were quietly startled, and the surroundings were so quiet that there was no sound.

Yan Zike stared at Yan Qi for a long time, the expressionless face made it impossible to guess what he was thinking, Yan Qi saw the look in his eyes from his pupils, "I don't plan to tell you the truth", she wasn't sure if this look had angered this person, of course, since she wore it, this person never seemed to be angry with anyone.

After staring at each other for a long, long time, Yan Zike stretched out an arm and gently patted the top of Yan Qi's brain.