Wizard: I brought the wrong system.

Chapter 509 Purification
Even though this base was already quite amazing in Bevin's eyes, it still didn't meet Yaro's requirements.

For example—base infrastructure.

In Yaro's view, the current underground base is still too small. Ideally, it should be dozens of stories underground. Otherwise, many sensitive forces will be limited by the principle of "if you don't know, you're not here," making it inconvenient to conduct research.

For example, concealment.

A true secret base should be one whose exact location is unknown to everyone except those who truly trust it.

However, this place was rented from Granny Oak, and its own power level was not enough to support the creation of a base on its own.

For example, security.

Although Bard was watching over him, he still needed to rest eventually.

Moreover, Bard's strength is low, so even if he is awake, he can't do anything to anyone if a wizard apprentice invades.

In summary, what Yaro wanted was the infrastructure for the Resident Evil underground base, the concealment of the research-type rogue ninja underground base, and the defense of the cautious cultivator's cave.

Unfortunately, Yaro did not have the financial resources of the Umbrella Corporation, nor did he possess the magical arts of infrastructure construction, let alone the magical arrays for warning, traps, defense, and attack.

With the existing conditions, this level of underground base is the only one that can be built.

Led by Bevan, Yaro quickly found Heri in the tool room, where she was working on wooden mechanical fingers.

"Heli, put what you're doing aside and come to the lab."

"right away!"

Not long after, Heri pushed open the laboratory door and peeked in.

"Lord Yarrow, what brings you here?"

Yaro pointed to the grayish-white stones on the ground and said, "Help me research a method to purify these poisonous salts."

“Research? I don’t know how.” Heryl said, somewhat embarrassed.

Indeed, even at the peak of my wisdom in my past life, I wouldn't dare say that I could pick up any stone and identify all its components.

Not to mention that Heri has never studied chemistry, and the 'elements' in this world are somewhat abnormal.

Thinking of this, Yaro smiled and said, "It's okay if you don't know how. Are you willing to learn?"

“Of course I’m willing!” Heri nodded quickly.

Bevan quickly added, "Teacher, I want to learn too!"

Yaro nodded slightly, pondering where he should begin.

The simplest and most direct way is to go straight to the Periodic Table.

The Periodic Table can be considered the general outline of chemistry, and even without other details, a thorough study of it can yield great results.

With the help of the magic of this world, it is even possible to create all kinds of magical witchcraft, just like the first volume of the "Book Without Words" in the world of Jade Dynasty!
After much deliberation, Yaro decided to keep a backup plan.

It wasn't that he was stingy or unwilling to pass on the "General Outline of Chemistry," but rather that he was worried about the danger of "a child possessing gold," since Yaro had already decided to leave in six months.

Another point is that this is not Yaro's hometown after all. Even if he really wanted to spread that key knowledge, Yaro hoped that the starting point would be his grandfather's territory, and that the first to benefit would be those little leeks who had been "beaten" by him since childhood.

So, Yaro said, "Heli, you've also purified sulfur and saltpeter, so you have some understanding of purification. Tell me, why can dissolving and filtering remove impurities?"

Although Heri had mastered several purification methods, she had not studied chemistry and could only answer questions using her everyday knowledge.

“This is because… the water… washed away the dirt…” Heri’s voice grew softer and softer until it was barely a whisper.

She herself felt that this statement was not quite right.

Yaro's lips curled slightly: "The two things you purified before, one is insoluble in water and the other is soluble in water. You can't say that the one that is soluble in water is the dirty stuff, can you?"

Heri's cheeks flushed crimson, and she lowered her head, unable to look directly at him. Yaro didn't press her further, turning to Bevin, who seemed lost in thought, beside him: "Bevin, what do you think?"

"I?"

Bevin was stunned.

Didn't Teacher Yaro just give us the answer?

Soluble in water and insoluble in water.

He glanced at the embarrassed little girl beside him and simply shook his head: "I don't know."

"It's either soluble in water or insoluble in water!"

Yaro didn't keep them in suspense and explained directly:
"Different substances have different properties, and the way to purify them is to set different thresholds."

"You know what a strainer is? Purification is about blocking out substances we don't need, or letting them pass through, just like a strainer separates two mixed substances."

"Due to our limited resources, the only purification methods we can use right now are distillation, crystallization, washing, and filtration."

"Distillation is the process of continuously heating a solution to evaporate volatile substances... What is evaporation? You can think of it as water being heated to turn into water vapor, that's evaporation."

"Crystallization is..."

"washing……"

"filter……"

“You’ve learned most of these methods before, Heri. You can try them one by one to see which one works.”

There is also electrolysis, but generators are not suitable for exposure, so even if salt is extracted by electrolysis, it cannot be used for large-scale production.

So Yarrow simply stopped mentioning it.

At this point, Yaro looked at Heli and continued, "Try processing it like this first. In any case, once you finish this set, you can also remove the gravel."

"I'm going to read in the library next door. Come and call me when you're done."

Yaro hasn't finished his planned study tasks for today and doesn't intend to waste time on repetitive work.

"understand!"

Heri immediately prepared to take action.

The first step was to break the stones into powder, so Heri got up to get a hammer.

"Teacher, wait!" Bevan looked flustered. "Aren't you coming with us?"

Yaro looked at Bevan with a puzzled expression, thought for a moment, and patiently explained, "Don't worry, it's not a difficult thing. Besides, Heri has done it many times before. You can ask her if you don't understand anything."

Bevin's lips twitched, as if he wanted to say something but hesitated.

You can't exactly say you had a nightmare, can you?

Moreover, after Bevan woke up, he also checked these toxic salt mines and found nothing wrong.

“Alright, I’m in the library next door, it’s not far. If Heri doesn’t understand either, you can come and ask me anytime.” With that, Yaro pushed open the door and left.

Ok.

Teacher Yaluo's words make sense.

That was all Bevin could think.

However, when he saw Heri coming over with the hammer, Bevan immediately smoothed out the worry on his face and smiled gently, "Heri, let me do it. You can teach me from the side. I'll learn faster if I do it myself."

(End of this chapter)