let go of that priestess

Well, although I don't say that I will never get sick, but the probability is very, very small. "

"Hmm...how small?"

"It's so small that when I wake up one morning, I have no chance of kissing you."

"...?"

Jiang Hongdou was stunned when he heard the words, and then said angrily: "Be serious!"

"It's serious." Ji Cheng looked innocent: "The probability is so small."

"Okay, okay..."

Jiang Hongdou tilted his head: "Then why, the probability of my people getting sick is not so small..."

"There must be other reasons." Ji Cheng took a torch to light up the place where the bats live, and said while observing:

"The most likely reason is that you ate the intermediate host of the bat virus."

"Intermediate host?"

"Well, the meaning in the middle is easy to understand.

The mammals that you usually hunt, the bats first infect them with the virus, and the virus in them becomes infectious to humans.

In the end, if you eat it, it will be transmitted to you. "

"Ah? Like this?" Jiang Hongdou blinked, thought for a while, and seemed to understand:

"That is to say, the closer the animal is to the bat, the more contact it has, the easier it is to become the intermediate host you mentioned?

So every time the clansmen approach this area to hunt, the more likely they are to get sick after eating it..."

"Well, that's why it's almost inseparable."

Ji Cheng nodded: "It's also because of this that you treat it as unknown and hide it far away, right?"

"Yes......"

Jiang Hongdou replied in a daze, then smiled wryly and shook her head: "Sure enough, everything has its root cause.

You explained it clearly in a sentence or two. I like this kind of obvious reason.

I like it much more than the vague reason that everything is attributed to the gift of the gods and the punishment of the gods. "

"I would also like."

Ji Cheng turned his head to look at her and said, "So you have to understand me, I am so curious about creatures like dragons that I don't understand at all!"

"Uh..." Jiang Hongdou was stunned for a moment, then shook her head again and again: "No! I can understand being curious, but safety is the most important thing!"

"Know it......"

"Well, it's about safety." Jiang Hongdou paused, frowned slightly and said:

"The intermediate host you just mentioned will be more if it is closer to the bat, but if it is far away, it seems that there is no guarantee?

Because animals can move, uh... In this way, even if you don't usually hunt near bats, you may still get sick?

What to do!Not safe...”

"Hey~ You have a great question!"

Ji Cheng laughed in amazement when he heard the words: "This is about another hidden benefit that civilization development can bring——

We must strive to avoid eating wild animals and only eat domesticated animals.

Domestic animals will not come into contact with bats, so the risk can be avoided directly from the source. "

"Oh! White bird?"

"Yes, white birds have the potential to be domesticated, and other domesticated animals will also be domesticated in the future.

But that will have to wait until the number of animals in the forest increases again in the coming year, and the food safety of the animals must also be considered. I will tell you about this later. "

While explaining science to the girl, Ji Cheng explored the cave bit by bit with a torch, and now he finally found his target.

He stopped the topic, pointed to a puddle in front of him and said, "As expected, there is a natural reaction pool here."

Chapter 43 Art is

In the karst cave, looking out from the recess of the cave roof where the bats gathered together, on the side near the exit, I found a thick, fluffy black soil piled on the ground——

Years of dung.

Then, some stalagmites dripping with water were found from the surrounding area.

The dripping water, soaked with part of the feces, and several streams of liquid flowed out.

One of them did not join the 'stream' on the ground, but gathered itself in a small puddle.

Ji Cheng squatted in front of this puddle, stretched out his fingers to dip it a little, picked it up and looked closely, it was slightly yellowish and had a pungent smell.

"That's it."

He picked up the jar he brought and filled it while saying:

"We don't need to transport manure, it's troublesome to transport it back, it's better to directly expand the reaction pool here, plug what needs to be blocked, dig what needs to be dug, and come and get it when needed.

Although the output is not much, it is enough for the two of us. "

"Huh..." Jiang Hongdou heaved a sigh of relief when he heard the words: "You don't need to pick manure, just bring manure water, right?"

"..." Ji Cheng's face froze: "What dung, this is the raw material!"

"Well, ingredients... I know, you don't waste anything, what's not an ingredient?"

Jiang Hongdou looked at him and muttered in a low voice: "Even sometimes I feel a little uncomfortable..."

"Guess, how about I help you relieve the discomfort?"

Ji Cheng rolled his eyes, and said while working:

"You think this thing is disgusting, but in my place, there were three countries who fought a war for four years over bird droppings."

"Eh... country? War?"

"Ah, you understand a country as a super-large tribe, and war is a struggle between tribes."

Ji Cheng emphasized again: "The other name for this war is the Guano War!

Three countries fought for 4 years for a place full of bird droppings and saltpeter.

Almost 9 people participated in the battle, and the death toll exceeded 3. "

"ha!?......"

Jiang Hongdou was stunned. She had no idea about the huge tribe just now, and she was dumbfounded when she heard the number of people.

"Die, 3 people died!? There are only more than 500 people from the Damu clan..."

"Hmm~"

Satisfied with the girl's reaction, Ji Cheng glanced at her again and said:

"That's why! Don't always think subjectively whether these things are disgusting or not, they are very useful!

It can be used as nitrogen fertilizer for crops and gunpowder, as long as it is handled properly and hygiene is taken care of. "

Ji Cheng will give the girl a vaccination first, and later, if potassium nitrate is to be produced on a large scale, she will also be prepared...

After returning to the camp, under the guidance of Ji Cheng, Jiang Hongdou focused on the power of black powder.

Ji Cheng's previous description of hot weapons and the current example of so many people fighting for them are enough to arouse her strong curiosity and expectation.

The two carry out the final steps to make black powder.

They dug the limestone again, and then the kilns started to produce quicklime.

When the preparation is almost done, start to wash the plant ash with water, and add fresh slaked lime to make lye.

The obtained lye and the retrieved 'dung water' are finally used to produce potassium nitrate.

A week later, they mixed potassium nitrate, sulfur, and charcoal.

The first black gunpowder finally came out.

No, it's just a prototype.

With Ji Cheng around, no matter the ratio or anything else, he would naturally not follow the old path in history.

The newly obtained gunpowder was crushed with a mallet, compacted, and sieved.

Repeat this process until the naked eye sees particles of uniform size before entering the flash test.

Divide a small amount and light it on the ground.

The sparks burst into flames, extremely fast.

The flickering fire made Jiang Hongdou novelty and surprised: "Aren't they exploding?"

"You need to know how the explosion works."

Ji Cheng is already satisfied with the combustion performance, and now he is grinding a part of the gunpowder powder more finely for later ignition.

"Burning black powder will release a lot of gas. Can you imagine that when you cook soup, does the wooden lid slightly go up?

This is the same, but it is much, much stronger. "

"Oh." Jiang Hongdou blinked: "It's in an open space now."

"That's right, so we also need a jar specially detonated."

Ji Cheng nodded, described the appearance of the jar to the girl, and asked her to fire it.

After a few more days, the detonation tank was ready, and after waiting for good weather with no wind and few clouds, which was suitable for detonation observation, Ji Cheng decided to make a flower today.

All the ground black powder was put into the detonating pot, and after weighing it, it was estimated that it weighed as much as a 30-jin bag of rice in the supermarket.

Ji Cheng put it on a shoulder pole, and took a small sack of finely ground gunpowder, a piece of fuse soaked in oil, and three specially cut wooden stakes of the same thickness and length.

"Let's go, everything is ready, let's go to the field beside the field to test the explosion."

"Eh? The land beside the field?" Jiang Hongdou followed up and asked, "Is there anything special about it?"

"Yes~" Ji Cheng smiled: "There are two reasons, one is that there is no tree cover in that place, so it is easy to observe.

The second is to use it for the early reclamation work of the next field, to blow up the soil and rocks, so that the power of the gunpowder test explosion will not be wasted. "

"Uh, don't you waste it, as expected of you..."

Jiang Hongdou was startled, the corner of her mouth twitched, and then she became a little nervous again thinking about the meaning of Ji Cheng's words:

"The dirt and rocks are all blown up...are we in danger?"

"Other than a ringing sensation in the ears, there is no danger."

Ji Cheng paused and added: "As long as it's far enough away, if it's too close, even if you don't get hit by the bomb, according to the amount prepared today, if the explosion goes well, you'll be half-dead."

"shock?......"

"Yes, the shock is the shock wave."

Ji Cheng indicated that it was not far ahead: "You will be able to experience it firsthand later."

Although the test explosion point is on the edge of the field, it is still separated by a certain distance, and it is not too close.

After the explosion, it is true that you can plow once for free, but it is not a good thing for the flying dirt and stones to hit the reclaimed fields.

After estimating the distance, Ji Cheng put down the shoulder pole, took out the detonating pot and placed it on the ground, stuffed the lead wire into the pot to make contact with the gunpowder, and let one end hang down on the ground, and put the cork on the mouth of the pot.

Then take out one of the three same wooden stakes and bury half of them in the ground at the tipping point.

Untie the small burlap bag, pour some fine gunpowder powder on the ground lead, and then retreat while sprinkling the gunpowder powder.

Withdraw fifteen paces and plant the second stake, withdraw thirty paces and plant the third stake.

Continued to retreat like this for about 150 meters, Ji Cheng stopped, set up a pergola for a while, and felt that it was almost the same.

He motioned to Jiang Hongdou beside him: "Low down and watch, don't stand up, this will reduce the impact."

"Oh......"

Jiang Hongdou hurriedly got down on the ground, watching Ji Cheng wipe out sparks with the rock striking and lighting suit, and ignited the gunpowder powder.