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"Tiangen?" Bai Song was walking around the street and received a call from He Ju. Tian Gen went to the village branch to find him, and only asked to see Bai Song, but no one.

"Well, he said that he would believe you." He Ju said helplessly, and Tian Gen didn't get in.

"Okay, I'll go there." Bai Song nodded. He didn't expect to get any effective reality from Tiane, but the cause of this incident was Tiane, who was also a good boy.

...

Tian Gen felt that the houses of the policemen seemed to be more familiar than those at home. After seeing Bai Song, his eyes lit up.

"Uncle...I...Can I follow you", Tian Gen said.

"Why? Do you also think your sister went to Beijing?" Bai Song reached out and touched Tian Gen's head.

"I...I also think my mother is abnormal." Tian Rong said with some uncertainty.

"How to say?" Bai Song asked: "Is your mother suddenly rich?"

Everyone has carefully investigated whether Tian Mu sold Tian Fang or not, including whether Tian Mu had recently received a windfall, but did not find out.

"Have money?" Tian Gen was a little confused: "My mother also went to provide you with clues to collect money?"

"That's not true," Bai Song shook his head: "You go on, I feel something is not normal in her."

"She...she doesn't have a good rest every night, and she talks about it endlessly," Tianne looked around, feeling a little embarrassed.

Bai Song screened the crowd, leaving him and Tian Gen in the house.

"She...what did she say at night...giving...giving herself or something..." Tian Gen was a little embarrassed.

"This?" Bai Song heard Tian Gen's words that were not clear, and felt like he was drunk!

With this sentence, Bai Song immediately understood what was going on!

evil!

teach!

! ! !

Bai Song patted his forehead!

It's actually this form of crime, no wonder all the feelings in front are strange!

If this is the case, everything is explained!

This thing can ruin people's homes, and it's believed to be true.

Bai Song yelled and let two local police officers in: "Look at Tian Gen and take care of him."

After that, Bai Song directly led the team to Tian's mother's house.

Bai Song's past this time was a little overwhelming. Not only their people, but also a dozen people to congratulate the game.

For safety reasons, everyone entered the yard. In fact, there is nothing insecure, but everyone is not relieved that Bai Song will come in by himself, as if this is a dragon's den.

Bai Song had been to Tian Gen's house before, and he clearly remembered that Tian Mu had a place for burning incense at the door of Tian Mu's house. Tian Gen's family is very poor. Except for the three tiled houses, there is no shelter from the wind and rain.

I have seen it here before, but no one has looked at it carefully.

"Police! Don't move this!" Tian Mu hurried over to stop Bai Song, because Bai Song picked up all the incense burners.

"What is this?" Bai Song asked.

"It's nothing." Tian Mu stepped back.

Bai Song was a little puzzled. There was nothing wrong with this incense burner, but the incense ash inside seemed to be a little special. He pinched the incense ash directly with his hands, it was not incense ash, it felt very heavy.

"What is this?" Bai Song asked.

The woman looked at Bai Song with a little horror, as if Bai Song was about to catch some bad luck, she didn't say a word, and took two steps back.

"Metal texture", Wang Huadong also squeezed a little, "The specific gravity is very large, and it feels similar to iron."

"Xin", Bai Song looked at it carefully: "I understand what's going on, something that fools people."

"Tin foil? Isn't that silver? Isn't it this kind of gray metal powder?" Huadong was a little confused.

At this moment, Bai Song seemed to understand what was going on.

In the past, in some places, some people pretended to be fools and used sodium metal. For example, to show someone that there is a ghost in the water, you secretly hide a small piece of metallic sodium in your sleeve, and then throw it into the water basin when you "catch a ghost."

Middle school chemistry has said that this chemical reaction will explode, and the sodium metal will quickly "swim" on the surface of the water to produce sodium hydroxide and hydrogen gas. The explosion is fortunate to form a white mist.

Such scams, with the popularization of compulsory education, every village has senior high school students, so scams have become less and less popular.

Seeing the metal tin, Bai Song instantly understood what the routine was.

"Metal gray tin", Bai Song said: "This is a process of allotrope change, which is bluffing. Under normal pressure, tin has two allotropes, white tin and gray tin. We use it in our daily life. All are white tin, which is metallic. But this kind of metal is very special. After the temperature is below minus 13.2 degrees, it may be converted into powdered gray tin. Gray tin has a diamond-shaped crystal structure with covalent structures between atoms. Electrons cannot be transferred freely, so they lose their metallicity and become powder. This process is called tin disease. The epidemic of the epidemic can still be contagious. After the white tin contacts the gray tin, the white tin will gradually become gray tin, and the density will decrease by 20 % Or so. I think the bad guys ~lightnovelpub.net~ might have told this woman that under the action of some kind of supernatural power, silver will turn into powder or something."

After a group of people looked at Bai Song and said, their faces were stunned, and they came over to see what it was. Don't say I have seen it before, I have never heard of it!

"Is there anything like this?" Sun Jie said, why he hadn't learned it before. "It's only minus 13 degrees. Why is the tin foil in life okay?"

"There are impurities such as aluminum and zinc in tin in life. There may also be antimony and bismuth to increase ductility and reduce the critical temperature of tin disease," Bai Song said: "Moreover, the conversion rate is not so high. It is more secure. This place can indeed achieve this situation outdoors. If the tin block provided is relatively pure, it will turn into powder."

"So you made up for the trick when you saw this?" Wang Huadong looked at Tian Mu and felt sad.

"In history, 100 years ago, the Eagle National Scientific Expedition Team went to the Antarctic. All of them froze to death on the Antarctic ice sheet because of a leak of kerosene. The reason is that the iron barrels were welded with tin and all became dust at that low temperature." Bai Song Said: "The tin epidemic was discovered by Aristotle in a few hundred BC, but the scientific expedition team 100 years ago could not remember this, so it is relatively unpopular knowledge. I didn't notice it when I came here before. , I thought it was some kind of incense ash."

"This is really awesome..." Team Peng and other detectives were whispering, and some people started to check this thing on the Internet with their mobile phones.

Tian Mu looked at Bai Song in a state of ignorance and panic.

She didn't understand anything else, but Bai Song's words like "silver will turn into powder under supernatural power" are true!

How could this policeman know about this!

She... didn't understand anything else, just heard this one...

She felt a little spin.