It was not until the evening that Huang Hai brought back the materials that Li Xin needed.

Li Xin called a group of gunpowder craftsmen led by Wang Da and led everyone to a brick cellar. It was different from the brick cellar that made porcelain. This brick kiln was square, less than one meter long and wide. There was a flue on each top and bottom, and the one above led to a small pool.

The Hongniang couldn't help but ask, "What is this?"

Li Xin turned around and smiled: "This is the combustion chamber. I will explain to you later. Come and take a part of the pyrite and place it on the upper layer, and place it in layers near the flue sieve hole. It should be even and not too tight to ensure that the smoke passes through it. Cook the charcoal fire below to grill it."

"Get orders!"

After a busy schedule, the two craftsmen lit the fire.

Through the ventilation holes, you can see that yellow-green smoke rose in the combustion chamber. Since the upper layer is almost sealed, the smoke can only overflow into the pool along the upper flue.

Everyone looked confused. Li Xin looked at it and said, "The principle is very complicated. After I write it out, everyone can understand what happened today after thinking through it."

"Hmph! Pretend to be a ghost!"

Gao Guiying hummed unannored.

About half an hour later, thin gas began to emerge on the water surface, and the water became much thicker than before. According to Li Xin's experience, the concentration was close to the limit and basically reached the level of smoke-induced sulfuric acid, so he called to stop.

A craftsman extinguished the charcoal fire. Erfu touched his head and asked, "Is this sulfuric acid? Commander-in-chief, I think it's similar to Qingshui!" As he said that, he was about to reach in.

"Stop quickly, don't want your hands?"

Li Xin hurriedly shouted, and Erju was so scared that he stopped on the spot.

You know, this is concentrated sulfuric acid. If you put your hand in it, it will definitely be ruined.

"The second pulp is not only sulfuric acid, but most of the raw materials synthesized by similar methods are dangerous goods. They are highly toxic and highly corrosive. You can touch and touch them randomly. Don't rely on my head if you lack arms and legs!"

Li Xin smiled sinisterly.

"oh!"

Erju scratched his head in fear.

Li Xin ordered again: "Please use a wooden spoon to scoop some sulfuric acid and put it in the jar, and then put the saltpeter in it.

"Get orders!"

Erfu carefully did it as he told him. When the wooden spoon was inserted into the sulfuric acid pool and turned black, his head was sweating. Then he sprinkled saltpeter with sulfuric acid, and another incredible phenomenon occurred. With the bubbles coming out, the saltpeter dissolved at an extremely fast speed, and a layer of white solid at the bottom of the jar was gradually thickened.

The reaction lasted for a short time. Soon, the tank returned to calm, and the liquid was still clear and transparent, except for saltpeter, which turned into a white solid.

Everyone looked at each other, their eyes full of doubt.

In fact, using this method to make nitric acid is not economical and also a serious waste. The mainstream method in modern society is to mix ammonia and air in a two-to-one ratio, pass it into the scorching platinum alloy net to generate nitrogen dioxide, and directly connect it to water to make it, but this condition is not available for the time being.

But taking a step back, when applied to military affairs, we cannot simply evaluate costs. How can the impact of a big victory be measured by money?

With 120,000 satisfaction, Li Xin said: "The jar is nitric acid, and the ones I made before were sulfuric acid. The difference between the two will be explained in the book "Nature" in the future. Now two people come here, pour the nitric acid into the clean jar, cover it with a black cloth, be careful!"

"Get orders!"

The two craftsmen followed the instructions. Li Xin originally planned to synthesize nitrofiber to open his eyes, but considering that the nitrofiber was too strong and would explode if he was not careful when dealing with it. He was not sure. After thinking about it, he decided not to take this risk. Moreover, even if nitrofiber was combined, it could not replace the status of granules for a long time.

So Li Xin no longer had much trouble and honestly combined thunder garlic mercury. In fact, synthesis of thunder garlic mercury is very simple. You only need to be careful to prevent accidental explosions and do anti-virus measures. In addition to nitric acid and mercury, some high-quality wine and a small amount of copper crumbs are needed.

Everyone gathered around and looked at it in confusion.

Li Xin waved: "Erju, Huang Hai, you, and you, yes, you are here too, let's learn from me."

"ah?"

The person who was named after the name showed bitterness on his face.

Li Xin said impatiently: "What are you afraid of? You are the personal guard company, not ordinary soldiers. Learning more is not a bad thing. I am not afraid of being the commander-in-chief. But I will talk about the ugly words ahead and look at how I did it. Don't make mistakes, otherwise you will be blown off and don't blame me for not reminding me in advance!"

A group of people were even more afraid to come up after Li Xin said this, but under that stern gaze, they had to surround the craftsmen.

Li Xin was doing a demonstration while teaching step by step. It took half an hour for everyone to finally put together a portion of thunder garlic mercury, but this was not a finished product. It would explode if it hits a little, and it cannot be used directly and must be passivated.

Among the many passivation materials such as wax, diatomaceous earth and grease, the best effect is wax. Li Xin asked someone to take some wax. The key point is the ratio. Too small does not have the passivation effect, and too large does not have to explode. This time, Li Xin did not ask someone to participate, but instead explored it by himself. With the scattered explosion sounds, after repeated trials, the appropriate proportion was obtained after a moment.

With mercury in Lei Garlic, you just need to load a small tube rolled up with thick paper and connect it to the lead wire, and it is Lei Guan.

"Yeah~~"

Looking at the Lei Guan in his hand, Li Xin nodded with satisfaction: "Did everyone remember it?"

Wang Da rubbed his forehead and said, "I remember, but what can such a small medicine be used for? I'm afraid even a finger will explode?"

Li Xin was so amused that he waved his hand: "Thunder officer is used as a detonator. When you go back today, each person will make twenty first, then take this drawing and work overtime with the blacksmith. At the earliest tomorrow morning, I will see the sample."

As he said that, he took out a drawing and handed it to Wang Da.

This is the various components that constitute water mines. In modern society, there are many ways to trigger water mines and it is hard to prevent them. At that time, Li Xin could only do floating mechanical impact mines. The key point is to trigger fuses. There are three types of trigger fuses. Due to time and materials, Li Xin started to use inertial impact fuses.

On the drawing, cast iron balls, iron rings, lining plates, iron springs, press rods and other components are drawn. The principle is that in the standby state, the spring passes the pressure to the metal ball through the press rod, so that it is stationary at the center of the metal lining plate. When the mine is collided by a ship, the closer obtains inertial acceleration with the lightning body, causing the metal balls to displace relative to the metal lining plate. If the acceleration and displacement are large enough, the metal balls will touch the metal rings, thereby connecting the circuit to detonate the mine. Due to mechanism reasons, this fuse cannot ensure safety while improving sensitivity, and can only be weighed between the two.

Also limited by time and actual conditions, Li Xin could not make a circuit, so he could only refer to the detonation principle of the grenade. When the metal ball and the metal ring touched, he pulled the fuse and detonated the mine by friction, and then detonated the mine.

As for making the mines float, it is very simple. Putting the mines into a closed wooden box requires only the trigger fuse outside.
Chapter completed!