Yang Ningguo, death row.

Ye Feng sat in the prison, playing with a stone in his hand, looking at the jailer who was still trembling outside the door talking about last night's haunting, and a smile appeared on the corner of his mouth: "Xiaomi, I can't govern you group of ancient people anymore?" ”

When he just heard that the Yin Soldier borrowed the Dao, he had a faint guess in his heart, the so-called ghost fire was likely to be phosphorus fire.

For a modern person, this kind of ghost fire is very common, and it is even more common in cemeteries, because human bones contain phosphorus, and after the corpse decomposes, it will change to produce phosphine, which has a very low ignition point and can spontaneously combust. At the same time, because the pressure is low where the fluid flow rate is large, it will move behind it when walking.

This is widely used in modern criminal investigation, because now the whole people are cremated, and if there is a phosphorus fire, it means that there is a high probability of a white ossified corpse there.

In ancient times, phosphorus was widely used, especially in armories, although it was not clearly defined.

Because the melting point of pure iron is 1538 degrees Celsius, it is only at this temperature that pure iron can change from a solid state to a molten state. Limited by the production conditions in ancient times, it was far from reaching this temperature, so the ancients needed to add sulfur, phosphorus, silicon, manganese and other elements when smelting iron.

Iron with impurities added can greatly reduce the melting point so that it can be smelted into iron.

They called the stones containing other elements the forging knife stone, and Ye Feng just ground the forging knife stone with extremely high phosphorus content, so that the phosphorus was exposed in large quantities and fully, forming a ghostly smoke.

"Nine Star Division investigates the case, open the prison door!"

It didn't take long for Lin Xiyao's somewhat eager voice to come.

This time, the jailers showed humility and hurriedly opened the cell door without saying a word.

Now they are a community of destiny, and they just hope that the Nine Star Division can quickly solve the haunted matter on death row, they are an errand boy, and no one wants to leave their lives at work.

Lin Xiyao walked into the prison, looked at Ye Feng with a smile on his face, and asked, "Did you hear that it was haunted on death row last night?" ”

Ye Feng got up slowly and replied with a smile, "Of course I heard about it." ”

Ye Feng's reaction at this moment is almost the same as yesterday, if yesterday he was still greedy for life and afraid of death, with a wooden face, today he has a sense of confidence and victory.

The more Lin Xiyao thought about it, the more wrong it became, her eyes flew, and she subconsciously asked, "Haunting...... It can't have anything to do with you, right? ”

Hearing this, Ye Feng's smile became even stronger, and he looked at Lin Xiyao with some playfulness: "If it has nothing to do with me, will you come to see me today?" ”

"What do you mean?"

Lin Xiyao was stunned in place, she really couldn't imagine what the haunting of death row could have to do with a heavily shackled Ye Feng.

Seeing this situation, Ye Feng didn't sell it, and accepted it when he saw it. He spread out his palm and showed Lin Xiyao the stone in his hand: "This is it." ”

At this moment, Lin Xiyao was even more confused: "Isn't this the forging stone you asked me to find for you yesterday?" ”

Ye Feng nodded, and changed his serious face: "The Yin Soldier borrowed the Dao from this kind of stone. ”

"Yin soldiers borrow the way? Get it out with this stone?! Lin Xiyao's face was full of disbelief.

But Ye Feng nodded, indicating that this was the case.

At this moment, Lin Xiyao only felt that she was being tricked, she took a deep breath and forcibly suppressed the anger in her heart.

For the sake of the Ye family, he has been running up and down, and he has not closed his eyes for several days, and now Ye Feng, a stupid boy, dares to play himself.

She looked at Ye Feng, and reorganized her language with anger in her anger: "I know that you are a little difficult to accept this matter, but don't give up on yourself, the whole of the Nine Star Division is trying to find a way, you insist on ...... persistence."

Ye Feng raised his hand to interrupt: "Your so-called forging knife stone is actually a kind of apatite, and when phosphorus is burning, because it contains impurities, it will form a green flame, which is the ghost fire in your mouth." If phosphorus can be extracted and a certain amount of phosphorus can be collected, a large amount of ghost fire can be formed. The ignition point of phosphorus is very low, and since it is summer, phosphorus can spontaneously ignite when exposed to air. ”

Lin Xiyao didn't understand what he was saying at all, just closed her eyes slightly, and asked in a tone that chatted with a fool, "And then?" ”

"Then it was explained that the Yin Soldier's borrowing was completely artificial, because phosphorus ......" Ye Feng was still explaining chemistry to Lin Xiyao in a serious manner, and suddenly raised his head to meet her somewhat impatient eyes, and subconsciously raised his voice: "Why don't you believe me?" Ask the jailer! They saw the green smoke with their own eyes last night. ”

Lin Xiyao slowly opened her eyes and looked at him: "But the green ghost fire borrowed by the Yin soldiers is completely different from the green smoke in your mouth. ”

"That's because I can't extract a certain amount and purity of phosphorus in this broken prison, as long as you take me out, I promise to get you a green ghost fire!"

Ye Feng jumped to his feet and shouted, quite a feeling of a child talking angrily.

But there was an incomparably firm light in his eyes, and there was an indescribable confidence on his face.

Lin Xiyao frowned at him and asked tentatively, "...... you Is it serious? ”

"I'm serious, as long as you let me out and prepare something for me, I will definitely be able to make a green ghost fire for you."

This time, Ye Feng's tone was very low, and he seemed to be more calm, which made him more worthy of trust.

"Alas, let's be a dead horse doctor, my father gave me the task of saving the Ye family at all costs, and now there are still two days to go, and it's no fun to count on the group of fools in the Nine Star Division......" Lin Xiyao thought for a while and said to him: "What do you need?" ”

……

Nine Star Division, back hall.

Ye Feng was shackled and walked in.

At this moment, everyone was stunned.

"Isn't it, Miss Lin took the death row prisoner out of death row? And brought it to the Nine Star Division?! ”

"It's crazy!"

"If the emperor knows about this, we will all lose our heads!"

Lin Xiyao looked at everyone coldly, and said sharply: "I brought the people out, and if something happens, our Lin family will bear it, so don't talk nonsense here, what about the things you prepare?" ”

These words can be regarded as blocking everyone's mouths.

"It's all on the table."

One pointed to the wooden table next to it, on which were placed different kinds of sand and stones, porcelain cups, porcelain bowls and other utensils.

Ye Feng walked to the table with the shackles, carefully inspected the utensils in front of him, and checked the sand and stone, which were apatite, quartz stone, etc., which were all needed to make ordnance and porcelain in ancient times, and the purity was okay.

And what he has to do now is to produce white phosphorus.

Solid white phosphorus can be extracted by simply placing the sand mixture in a container, heating it to 1,600 degrees Celsius and passing the resulting steam into cold water.

I hope it works.

Ye Feng took a deep breath, mixed several sand stones, and put them into the container.

But in the next second, he was stunned.

Because here, there is simply no way to heat the mixture in front of you to 1600 degrees Celsius!

"What's wrong?"

Seeing Ye Feng stunned in place, Lin Xiyao walked up to him and asked in confusion.

Ye Feng slowly raised his head, his eyes were full of loss: "No way......"

"No way?!" Lin Xiyao was stunned for a moment, a little surprised: "What can't be helped?" ”

Ye Feng nodded weakly, and said faintly: "If you want to make white phosphorus, you must heat these to an extremely high temperature, you ...... It couldn't be ......."