Wizard: I brought the wrong system.

Chapter 335 Reviewing Lessons (Please Subscribe)
After finishing all that, Yaro tidied himself up a bit and then took out the skull mask.

This skull mask doesn't contain the official spell 'Underwater Walking', nor does it contain the intermediate trick 'Underwater Breathing', but by adding water to the interlayer, Yarrow can ignore the surrounding air environment.

The reason for all this lies in the magic patterns that can generate tiny electric currents.

That's right, it's electrolysis.

The skull mask is essentially a finely crafted electrolytic cell. Relying on the wizard's magical runes, it uses magic stones as energy to generate a tiny electric current, continuously electrolyzing the water in the interlayer into oxygen and hydrogen.

This is knowledge from his previous high school education. He is now preparing to use the mask's ability to review some other high school knowledge.

—The caustic soda needed for the saponification reaction.

Sodium hydroxide, also known as caustic soda, is a strong alkali and does not exist in nature.

There are many ways to prepare caustic soda, but Yaro has limited materials, so he plans to obtain it by electrolyzing saturated brine.

Electrolysis of saturated brine yields sodium hydroxide, chlorine, and hydrogen.

Of these, chlorine and hydrogen gas escape into the air, while only sodium hydroxide remains in the liquid.

Air pollution?

what is that?
Wizards don't follow that kind of thing!
Once enough sodium hydroxide had been produced, Yaro took out some saltpeter.

When saltpeter is dissolved in water, it absorbs heat, continuously cooling the water, which will gradually freeze.

Soda ash will solidify at a few degrees, while salt will only solidify at minus ten degrees. Soda ash can be extracted by crystallization.

Of course, the caustic soda extracted in this way will inevitably contain impurities, but Yaro does not have high requirements for concentration; it just needs to be about right.

Set the prepared caustic soda aside and let the water in it drain out.

I took out the oil that had accumulated over the past few months. It wasn't much—in terms of quantity, it probably wasn't even as much as the two buckets of vegetable oil I had in my previous life.

Perrin Castle was already short of livestock, and the servants in the castle also needed to consume oil. Yaro himself was a major oil consumer, and he was able to accumulate so much oil thanks to the white deer's help in hunting.

Next, Yaro plans to use his knowledge from his high school days—the saponification reaction.

Saponification is not difficult and does not require any other additives. However, if you want to speed up the reaction, you can add some alcohol to reduce the viscosity of the oil, making it easier for the caustic soda to penetrate the oil.

Yaro hadn't prepared any alcohol, so he stopped thinking about those things.

Add oil and heat it until the animal fat melts at its solidification point, then add the caustic soda prepared earlier.

The next step was simply to wait. To prevent the oil from solidifying again, and because this process also required a temperature of 90-100 degrees Celsius, Yaro added a pot of water in the middle to maintain the reaction process with water temperature.

Taking advantage of this brief respite, Yaro first took out some food from his spatial ring, and while eating, he observed the situation inside Perrin Castle.

Fortunately, in just half a day, Perrin Castle did not undergo any major changes.

Seeing that the 'bait' had not yet shown any signs of being triggered, Yaro glanced at the telescope and turned back to continue making the tools.

The saponification reaction didn't use much caustic soda, and Yaro had his own use for the remaining caustic soda.

Dissolve caustic soda and continuously pass carbon dioxide through it, allowing it to gradually transform into soda ash.

With soda ash, glassmaking becomes simple.

Adding soda ash not only lowers the temperature required for glassmaking but also reduces the number of air bubbles in the glass.

Of course, there are advantages and disadvantages. Glass containing impurities will have reduced mechanical strength and chemical stability, so limestone is usually added to ordinary glass.

Yaro has nowhere to find limestone now, so he can only add less soda ash and increase the temperature to continue making glass.

As long as you are willing to use molten stone, glassmaking is not difficult even if you lack some materials.

Large beakers, tubing, glass rods... as time went by, all sorts of instruments took shape in Yarrow's hands.

When it was completely dark, Yarrow finally finished making the equipment. At the same time, the saponification reaction was also finally completed.

I used a light spell to illuminate the area and moved the glider a short distance to ensure no light was shining towards the castle.

When saturated brine is added to the saponification reactor, a layer of milky white viscous substance quickly appears on the surface of the solution.

—This is soap.

The remaining product is glycerol, a byproduct of the saponification reaction.

Of course, glycerin also contains a lot of salt and water.

Continue heating; the salt will not evaporate, so it will remain—collect the 'mysterious gas' and cool it to obtain 'mysterious liquid a'.

Sulfuric acid is burned to collect gas, which is then dissolved in water with oxygen to obtain 'mysterious liquid b'.

Add saltpeter to 'mysterious liquid b', heat it, collect the gas, and then dissolve it in water to obtain 'mysterious liquid c'.

Adjusting the concentration, cooling it down, mixing the three 'mysterious liquids'...waiting.

……

Boom...!
A muffled clap of thunder suddenly boomed in the dim sky.

A white light flashed, then gradually subsided after a moment.

A cool night breeze rustled the leaves of the surrounding trees.

Yaro looked up at the sky and thought to himself, "Is it going to rain? The weather is changing so fast."

However, he wasn't worried, since with the 'glider' as a roof, the rain wouldn't get on him.

We just need to fix the gaps around it to prevent wind and rain from blowing in and disturbing our rest at night.

……

Even after a long day, little Heri didn't feel tired at all.

Putting aside the fact that she herself came from a poor family, those things were personally instructed by Lord Yaro.

She felt there weren't enough things that could help adults.

If it weren't for Lord Yaro forbidding the lighting of lamps, and if the servants weren't needing to rest, she would have wanted to continue 'working overtime' and finish the work as quickly as possible. How could she have felt tired?
To be Lord Yaro's '007' is a blessing!
Speaking of Lord Yaro, little Heli inexplicably thought of Miss White Deer again.

"Why didn't Miss Bailu come back with Lord Yaro? Did she go straight home? Did she sing that song to Lord Yaro?"

"Miss Bailu is so beautiful! She and Master are such a perfect match!"

"Unlike me... I'm thin and small, and my hair is dry and red."

The little girl's emotions came and went quickly; she only wallowed in self-pity for a moment before cheering herself up again.

"Since I can't continue refining materials for Lord Yaro tonight, I'll just be the generator he suggested!"

"When the adults come back next time, I'm going to show them the generator!"

Thinking of Lord Yaro, the little girl's eyes crinkled into two crescent moons with laughter, and she skipped and hopped as she walked.

She jogged to the familiar laboratory, carefully picked up the ordinary-looking stone from the lab table, and then took out the notebook she kept close to her body from her bosom.

"What should we do with the generator?"

The little girl pouted and began to carefully examine the items.

(End of this chapter)