When the six iron pots were about to dry again, Brandy instructed them to remove some of the impurities floating on the surface and continue to boil.

Eventually, the water evaporated completely, and a layer of sticky white powder appeared on the surface of the iron pot.

That's what Romandi needs, it's called "nitrate"

In previous lives, nitrate was generally found in nitrate ore, and collecting saltpeter in nitrate ore to make nitrate was 10,000 times stronger than this method.

But Flandy didn't know where there was nitrate in the world, so he had no choice but to use this most primitive and earthy manure and urine heap method to make nitrate.

He instructed the workers to lift the iron pot, find a flat piece of ground, pour the remaining boiled things on the ground, and spread them evenly.

When these things are dried, they are a good fertilizer. It is commonly known as farmhouse fertilizer.

For an entire afternoon, Brandy had been instructing the workers in making nitrate and farm manure at the waste recycling plant.

When he returned to the Magic Tower at night, everyone hid when they saw him, even the maids. I can't help it, my body is so smelly.

Forget it, I didn't want this clothes, I took a shower, changed into clean clothes, and then I had dinner with everyone.

"Flandy, you, you're not really going to cook that, are you? Shirley looked at Frandy with disgust.

"Uh, what about eating, don't talk about it!"

"Oh. ”

Due to everyone's scruples, this dinner was surprisingly quiet.

It wasn't until the end of the dinner that a burst of laughter erupted.

"Hahahaha, Flandy, what the hell is wrong with you, why are you so interested in that thing!"

The partners teased Flandie, but Flandy didn't say a word.

"Hmph, wait until I make it, and I'll scare you again!"

Since today is the first time to make nitrate, the output is not large, and I only got cans in the afternoon.

But this jar was enough for Flandi to experiment, and the next morning, he went to the laboratory on the seventh floor as usual.

There are very few sulfur mines in the central empire of Oskaia, but there are many in the Iwu Kingdom, which is a commonly used medicine, adding it to water, only a little bit, spraying it on the leaves of fruits and vegetables can kill some pests.

So this thing is easy to buy, and a gold coin can buy a large pile.

Charcoal is even more common, and it is available everywhere, and in winter nobles and wealthy families use it to keep warm.

If you have all three of these things, such as nitrate, sulfur, and charcoal, then you can make black huo medicine.

The power of black huo medicine is not great, unless it is made into an explosive pack, otherwise the bullets and shells made of black huo medicine will have limited damage to the monster.

Of course, if it is for human beings themselves, the power is still infinite.

It's the New Year, and Frai is ready to do some fireworks.

Artillery is the best to do, roll a few layers of thick paper for black huo, and output a fuse is artillery battle, there is nothing difficult. It didn't take long for Flandy to make ten.

In retaliation for the ridicule of his friends, each cannon was as thick as a thumb, and in order to test it out and not be discovered by them, Franky deliberately opened the portal to the primeval forest.

The snow in the city was clearing, but the primeval forest was still covered with snow, and after passing through the portal, a cannon was lit and thrown far away.

There was a loud "boom" and it came over.

Very good. The artillery test was a one-time success.

After ten artillery battles, not a single deflated person was discharged, and all of them exploded. Flandi himself was very satisfied.

After returning to the Magic Tower, work on the fireworks.

Fireworks are much more difficult to do than cannon sticks, and Flandy doesn't want to make the kind of small fireworks that can only "smack", he wants to make the kind of salute bombs that can hit the old high.

Thanks to the Internet in the previous life, various methods of making fireworks can be found, and the materials are extremely simple, but it is more cumbersome to make them by hand.

Before Tom and Jerry's engraving was finished, Flendy asked him to help him start making small balls made of black potion with water and rubbing.

And he himself tried to make it while recalling the steps of production.

When he made one, he went to the primeval forest to see the effect, and then improved it until he reached the seventh, which was relatively satisfying.

I only remember that the black huo medicine added calcium-containing salts burst out of a beautiful peach blossom color, and the others are some chemicals, in order to make the fireworks more beautiful, all the messy things were added to him, and after repeated experiments, he finally found out the formula of several colors.

When I went to the primeval forest again to set off fireworks, it was already dark, and a firework flew straight into the sky from a tube made of Gaia steel, and exploded a beautiful fireworks of peach, white, green, and yellow.

"OK, although the effect is not up to the level made by those professionals in the previous life, it should be enough. "Frandy is quite satisfied with his craft.

The saltpeter he brought yesterday was almost used, and before dinner Brandy went to the garbage recycling factory again and brought back more saltpeter.

It's just making fireworks. These saltpeters are sufficient.

The next day, for the whole day, Flandi had been making the ceremonial bombs, and some simple cannonballs, small fireworks, etc., were handed over to Tom and Jerry to make.

The two experimental assistants didn't know what they were doing, and Frandi only disciplined them, and they only did it, but Frankie still told them not to touch the fire.

The partners are not here, today is the last day of their class before the year, and after today, the rare annual leave of the year is coming.

After the annual vacation, the friends are already in the third year of the university department, and the classes are not so tight, and there will be a lot of time to play.

Anita and Ai have been living in the Magic Tower, but their friends have something to do, and they can't help, so they seem to be a little bored during the day.

I had nothing to do and ran to the seventh floor to find that Flandi and the others were making fireworks, and I looked at it curiously for a while, and found that this thing could be made by itself. So the two girls also asked to join the production together.

Of course, the two of them didn't know what they were doing, just looking for something to pass the time.

Not to mention, the girl was more careful than the man, and they made it much more elaborate than Tom and Jerry, so the two brothers were sent to rub the powder balls.

The five of them worked together, and by the time it was getting late, a lot of fireworks had been made, and Flandi was afraid that something would happen to him, so he blew up the magic tower he had worked so hard to arrange.

Although the tower body was not damaged by the explosion, many of the magic machines in the laboratory were still squeamish, so they threw all these crafts into the storage room on the basement level.

After dinner, everyone gathered in the library on the fourth floor, and Franky came over with a few cannon shots and small fireworks.

"Hey, Vito, I've got you covered!"

Finally relieved, Vito, who doesn't have to go to class tomorrow, is thinking about how to play, and Flandi comes over and says that it will be fun for him, and he is immediately overjoyed.

"Flandy, what's fun?"

"Let's go and play outside the tower!"

Everyone was relaxed, and after hearing Frandi's words, more than a dozen people came to the small square in front of the magic tower.

Frandie placed a cannon in the clearing, then handed a lit branch to Vito, the little fat man.

"Here, you use this to dot the little thread on that paper shell. ”

Vito didn't know what it was, he saw a little cunning in Flandy's eyes, and he felt it was a trap.

"I'm not going, if I want to go to you, it's definitely not good, you're too cunning!"

"You're still a magician. Don't dare to do such a simple thing?" said Frandy.

"Hehe, I'm just not going, what can you do with me?" Vito wasn't stupid, the more Frandy asked him to go, the more he didn't go.

The two shirked for a long time, but the little fat man still didn't go, but Ted next to him couldn't stand it.

"Vito, you're so cowardly, it's just a pile of paper, what are you afraid of?

Ted strode over to Frandi, and Lilia knew that Frandi was going to play a prank, and wanted to hold her brother, but Ted broke free as soon as he broke free.

Holding the twig with only a glimmer of fire in Flandy's hand, Ted took a few steps to the side of the cannon battle, bent down to aim at the lead of the cannon battle, and touched the fire on the twig.