In the wing, a ray of morning light shone in through the window, illuminating Yuan Chenming, who was lying in front of the table, who was writing a project plan.

Collect raw material recipes, make molds, and assemble them. You need a carpenter, a blacksmith, and a handyman.

Biting the pencil head, he had a headache, obviously this is not something he can do alone, he has to find someone who can take charge of things as a helper.

Knock knock, instructor Wang Desheng knocked on the door that was not closed: "What about writing?" ”

Yuan Chenming's eyes lit up, "Instructor, you came just in time, I have something to look for you." ”

"You made a bet with the regimental commander?"

Wang Desheng obviously heard about it, and maybe he came to him because of this matter.

I have already eaten the small stove of the cooking class of the regiment headquarters last night, and it is already very good to have meat and vegetables, and it is time to take some action.

He said, "Instructor, that's it. I can't eat and drink for nothing from you, I have to prove myself. But now that I'm in trouble, I have to help me with the instructor. ”

How can it be said that it is eaten and drunk for nothing? As long as people can stay and join the Eighth Route Army, they are their comrades.

Wang Desheng wanted to talk about him, but when he thought of his students, he was thin-skinned. Besides, it may have the opposite effect, so I suppressed the idea.

"Okay, you can tell me what you want to do, and if there's anything I can do to help, just say it."

"Instructor, that's what I'm waiting for." Yuan Chenming took his plan and rendered his grand blueprint with a bang.

There is no doubt that talking about dreams and drawing cakes can directly stimulate people's adrenaline secretion, which is a tried and tested method from ancient times to the present.

Half an hour later, Wang Desheng appeared directly in the pigsty in the village as Yuan Chenming's assistant.

He took a shovel borrowed from a fellow villager's house, and little by little patiently shoveled down the purple-red dirt from the corner of the pigsty.

The old sows in the pen were not taken into account at all, and the foul smell seemed to be unheard.

The owner of the old sow, the old man stood outside the pigsty and looked strange. I have only heard that the Eighth Route Army chops wood and carries water for the villagers, and I have not heard that the Eighth Route Army also helps clean up the pigsty.

Running into his pigsty to shovel mud is too wasteful and unnecessary.

After working for a long time, Wang Desheng shoveled half a basket: "Xiao Yuan, do you want to see this line?" ”

"Instructor, you bring something here, I have to check it to find out." Yuan Chenming stood five meters away, covering his mouth and nose with his hands to block the stench.

His love of cleanliness drove him to never step into it. If he really did it alone, the first step might be to sink into the sand.

Of course, maybe.

Nitrate soil is generally found in toilets, pig and cattle pen houses, old walls in courtyards, cliff edges, caves, and ground that is not easily washed by rainwater.

The fact that the three positions are connected to Yoneda is telling.

In a basket covered with oiled paper, there was some strange smell of dirt, some of which was dry and purple-red.

"Is this what you want?" Wang Desheng didn't know the bottom in his heart, it was hard to believe that this thing could become an important part of explosives.

That is, he has been in elementary school for a few days, has read some books, and has a certain understanding of science and technology, so he will be skeptical.

If you change to a coarse man who doesn't understand anything, he must think that Xiucai is telling a story and coaxing ghosts.

Indeed, let alone him, Yuan Chenming himself is not quite sure. As a law-abiding citizen, it is impossible for him to experiment with this kind of thing before, illegally making and possessing explosives, starting with three years without a cap.

He had to do this kind of thing.

Now the situation is different, there are no restrictions, and you can do this thing. He has no experience, so he can only read from the book and realize the knowledge in his mind little by little.

He recited: "The nitrate soil is moist, it is not easy to dry, and it turns slightly purple-red when exposed to the sun." ”

Wang Desheng stared at the soil in the basket, and the dry soil was somewhat purple-red.

"Most of the nitrate soil has a face of falling soil, the particles are ant-shaped, bitter, spicy, salty, especially spicy is good nitrate."

Wang Desheng observed according to his words, and it seemed that what he meant. But just looking at him was not at ease, so he pinched up a small handful of purple-red soil.

"Oh, don't!" Yuan Chenming just stretched out his hand to stop it, but it was too late. Wang Desheng quickly put the dirt on his tongue and tasted it.

"Bah, bah, bah." Wang Desheng gave the answer he came up with after dedicating himself to science: "It's bitter, salty, and spicy." If you do what you say, this is good nitrate. ”

Yuan Chenming swallowed his saliva and couldn't help but give a thumbs up to the instructor's dedication.

Anyway, he can't do it, and he can't do it to death.

What's more, there is no better way. A good nitrate will spark when placed on red-hot charcoal.

For them, it's just a matter of time.

？？？

Wang Desheng was stunned, and looked at Yuan Chenming embarrassed but politely.

"Say it sooner next time, okay?"

"Definitely, definitely."

The instructor is not afraid of hardship and dirty. But he didn't want to suffer a sin.

I know that there is a better way, but I still have to suffer that sin. That's not called suffering, that's cheap.

Without bothering the two masters, they borrowed the stove fire from the master, and the two continued to verify whether the nitrate was the kind of substance they needed.

A little fuchsia nitrate was sprinkled on the hot charcoal fire, splashing a little spark.

"That's it, sure." Yuan Chenming is very sure this time.

When he was a child, he took apart the firecracker that didn't explode, and got out the black powder inside and sprinkled it in the stove, which was the same as this one.

Wang Desheng's old face also smiled, and he could burn sparks, it seems that the big cake painted by Yuan Chenming can really be realized.

"By the way, there are still some in the pigsty, I'll dig them all up." He rushed to the pigsty with the basket in his arms, as if he was afraid that someone else would rob him.

I was even more confused about that old man. The soil can be burned, and it becomes fragrant and sweet.

Yuan Chenming had no choice but to explain a few words to his fellow countrymen, don't let him really burn the soil.

At this point, the raw material of nitrate is confirmed to have been collected.

But this is only the beginning, nitrate can not be used directly, it needs to be used by drenching water to extract potassium nitrate, and finally the soil method is boiled, these two are very important steps. There is also some knowledge of chemistry involved.

The main principle of extracting potassium nitrate from nitrate soil is to use potassium ions in plant ash to replace sodium ions in nitrate soil to generate potassium nitrate.

In addition, the carbonate ions and sulfate ions in the plant ash are combined with the calcium and magnesium ions in the nitrate to form insoluble salts and precipitate, so as to remove impurities such as calcium and magnesium.

It's very troublesome, but fortunately he didn't do it alone, otherwise he wouldn't have that patience.