Roland had been thinking about the bullets of the rotary rifle for a long time, and the round lead and bulk gunpowder were too backward, and it was technically feasible to directly manufacture copper-shelled ammunition, taking into account Anna's processing ability.The key is how to ignite the black gunpowder filled in the shell without a reliable fire.

The bottom fire of the early metal shell fixed bomb is generally the lightning-acid mercury that is extremely sensitive to the impact, and the trigger trigger trigger hitter is triggered to ignite the retinal mercury fire at the bottom of the bullet, thereby igniting the shot of the drug and firing the warhead from the gun chamber.

Unfortunately, he wanted to break his head and could not remember what kind of raw materials needed to make mercury, which literally must have nitric acid and mercury, but the handwritten reaction shows that these two substances will only produce nitric acid*mercury.

And lightly know that the raw material does not mean that the finished product can be successfully produced, whether the solution has concentration and temperature requirements during the reaction, and whether the need for a catalyst is also a key factor affecting the finished product.Moreover, due to its sensitive properties, it is easy to trigger an explosion when it is manufactured, and if he does not pay attention, he will lose two fingers, so he is afraid to try it himself.

Therefore, Roland had to retreat, in the case of the use of metal shell still using flint firing ignition, which requires Mars to enter the inside of the shell and ignite gunpowder.Therefore, the bottom of the shell must be left at the bottom, and at the same time, it is necessary to prevent the gunpowder from leaking out.

Obviously, there is an irreconcilable contradiction between these two points: the bigger the opening, the faster the gunpowder leaks.If the opening is too small, it is difficult for Mars to ignite the gunpowder inside.

He needed something that would be ignited by Mars, while blocking the openings and preventing gunpowder from leaking.

Roland's first thought was nitro cotton, also known as tampon.

This is also the few chemicals he remembers that can be used in weapons because its preparation material is very simple: cotton can be soaked in two strong acid mixtures.Acid is the most commonly used sulfuric acid and nitric acid, and there is no danger when it is produced.He wanted to wait until the alchemist was recruited before the cotton trial, but now that he had set a seven-day contract, he decided to put up his sleeves and personally.

When he lifts the quill pen, he writes the long-awaited idea on draft paper.

The first is cotton, preferably the textile and unstained cotton yarn, which has been moved back from the duke's house and is now piled up in the castle warehouse.Cotton yarn needs to be degreased, otherwise the grease attached to the surface will hinder the nitrification.Most of the things that remove grease are familiar with, that is, sodium hydroxide, also commonly known as caustic soda.At the same time, it is also the raw material for making soap: add a sodium hydroxide solution to the oil, stirring evenly into the mold solidification, you can get washing soap.Only Roland has been busy developing agriculture and fighting foreign enemies, and has not worked hard to develop such daily necessities for the time being.

As for how to make sodium hydroxide, the simplest is probably electrolytic salt water.So the prince found that in order to build a new bullet, he had to start with a DC generator.

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The ash walked on the river of the Red Water, and the mood was still low.

Ever since the witches knew that she had come here to advise the co-oping sisters to leave the border town, their attitude toward her had cooled down, no longer with the enthusiasm of the first time they had met last night.

Moreover, she noticed that most witches practiced their abilities in the castle’s backyard, suggesting that Roland had also discovered a way to avoid suffering from magical phages.The intention to exchange this vital intelligence for the witch's favor has been shattered, and he has almost nothing to do except explain the pros and cons to them alone and persuade them to leave.

The most surprising thing about the ashes is that Roland Wimbledon has not changed much in his appearance, but there is an indescribable temperament between his hands and feet, which is out of line with the image of the former son.

Why is that?He was obviously an incompetent person in the past, the first thing that came to mind when he encountered things was to escape, not to mention standing up for others, even if he did things himself, he was afraid to take responsibility.Thinking of the harassment, but a disgusting look made him panic and fall to the ground.Tily came to hear, but he lied that he accidentally fell, and blamed the five princesses, why find such an ugly woman as a bodyguard.

Since then, Ashes’s perception of the Four Princes has fallen to its lowest point.

Originally thought that such a person could not solve it, but today's negotiations she did not have the upper hand, especially after the other party said one-on-one test, she found that she even used force to force the threat did not work, because the other party did not avoid questioning, but intends to answer their own questions positively in the way of the test.At this time, he threatened himself personally, and had no other use than to reduce the witch's good feelings.

Ash sighed, if she can be as smart as Tiley, any problem in front of her will be solved, if this situation, she will also be able to come up with a solution?The ease and expectation of coming was gone, and if it had not been for the help of Tiley as much as possible, the ashes really wanted to take the ship to the port of Bishui and leave the gray fort as soon as possible.

Unconsciously, she found herself out of the confines of the town, and the other side of the river was no longer a lush wheat field, but a woodland that had not yet been reclamationed.

Just as the ashes were ready to turn back, behind her sudden magical fluctuation, she subconsciously overshadowed her head, a dagger stabbed out of the cheek, and then crossed the road.The surging magic has become a huge wave, and the ash feels that half of his cheeks are stabbed to death, and the other party's coherent moves are obviously not something ordinary people can do.She no longer hesitated, letting her body completely dump, avoiding the dagger sweeping through her eyes, and ejecting herself on one foot.

However, the other party disappeared out of thin air, and reappeared behind their own back in the blink of an eye, and the ashes did not even see how the other party moved.

She drew out the great sword, and the body rotated in a circle, driving the blade to make a dull whistling, and at such a speed, the ground raised a large amount of dust.The no-dead-end attack method can lift any threat within the scope of the sword attack, but this trick fails in front of the other party's strange body, and the giant sword sweeps through the dark shadow position, as if nothing is encountered.

Badly, she thought to herself, her muscles were tight, and as she prepared to eat the next round of attacks, the dark shadow disappeared from her.The dust slowly landed, and the man was standing not far from her, playing with the dagger in her hand.

It is the Nightingue.

“Is that a warning?”Ashes frowned.

"Of course not," she said, adding the dagger to her waist, "I just want to see the power of the Excepter."

"Is it?"I thought you wanted to say.”

“Let you leave the town, or you’ll be polite?”The Nightinginge interrupted, "In that case, what a difference between me and Hakalla."

Hakkara?Why did she mention the former leader of the conference?Ash thought inexplicably.

"You can persuade each sister, if anyone is willing to leave with you, I think your Highness will not stop you, of course I will not."But...” The Nightinge paused, “Don’t try to hurt or threaten His Royal Highness Roland, or I won’t deliberately stab you next time.”Here she grinned and disappeared into the air, "Enjoy life in the border town."

He warned himself, and the ashes shook his head.(Unfinished.