Another day passed, and Imu returned to the Lime Pine Valley.

"I've brought some new magazines back this time, you can read them when you have time, although you may not be able to read them, but you can increase your knowledge. Im summoned a few disciples and said.

"I also brought back some seeds, supposedly some spices, and I will plant them when the time comes. ”

"Teacher, it's winter now, are you going to live if you plant it?" asked Kaichi.

"Of course, I waited until the spring to plant again. Im said.

"It would be nice to make a greenhouse so that it could be planted in any season. ”

"If you want to be able to ignore the seasons, there are not enough magic circles in the Hundred Herb Garden now, you need a large temperature adjustment magic circle, this magic circle is particularly expensive, the greater the temperature difference, the greater the energy required, the more expensive it is. Now, we can't afford it. Im said helplessly.

He didn't notice that Jia Yi was talking about the greenhouse, thinking that it was the temperature control circle commonly used by mages. Jiayi didn't think about correcting it, because if you want to build a greenhouse, you need glass or film. In fact, if the requirements are not high, it is also possible to build it in the house and use the ground kang to warm it.

It's just that if you are planting medicinal herbs, you have higher requirements for light, and you still need a glass house.

Kaichi casually flipped through the magazines that Imu had brought back, and there were mostly new magical applications in them, and there was very little about theory. The magazines given to them by Major Imu were mostly about the application of magic, and high-end theoretical knowledge was not suitable for them.

"Hey, teacher, is this what you published?" Suddenly, Kaichi flipped to a paper on the filtering effect of charcoal. And the authors of the above paper are Imu and Kaichi.

Im smiled and said, "Yes, it's a paper on charcoal." It was published last month, but it was only a short time after arriving in Wickham City. It is said that the response has been very good, especially in combination with the ultra-pure spiritual power potion I made last time, which can be regarded as allowing people to see the purifying effect of charcoal. When the pharmacists see it, our paper will be profitable, or at least the botanical garden will be improved. ”

"I don't know when I'll be able to publish my paper?" Dale sighed.

Flower also said: "Yes, even Jiayi has published a paper. ”

Jia Yi said: "Next time if you have the opportunity, you give me a hand, and I will bring you, the third author." ”

Imu shook his head and said, "You guys, let's learn the course first, no matter what the paper is, it's not that simple." ”

He thought it was a little funny, thinking that his students were thinking about the paper a little simply, especially Jiayi, who was a bit unscrupulous when he had a novel idea. When he is frustrated later, he should understand that as a mage, there is no end to learning, and the thesis is not so simple.

It's a pity that he doesn't know that Jia Yi's mind contains the knowledge of half the world, especially the basic knowledge, as long as he wants, he can always find something to invent.

......

Kaichi extinguished the fire and took out a large cloud of liquid from the furnace, which was once red like magma. He used the mage's touch to flatten the liquid into a single piece. Then, with the remnants of his magic, he blew a cold wind.

I saw that the liquid on his tentacles cooled rapidly, turning into a piece of flat glass that was not very transparent.

Ever since the last time he accidentally said about the greenhouse, Kaichi has been thinking about making glass. In fact, the formula of glass is not a secret, it is already rotten on the street, especially in the online literature industry, of course Jiayi also knows.

Quartz stone (sand), soda ash, limestone fired together, you can make glass, if it is pure silica sand, after melting can get quartz glass.

Unfortunately, there is a gap between theory and practice.

He waited until the residual temperature of the glass had subsided, and the glass had been made, and it was not too big, about the size of a laptop, and the thickness of a Xiaomi phone. It looks like it's been successful.

It's just that it just looks like it, and Kaichi puts the glass on the ground, picks up a small piece of stone the size of a coin, and throws it onto the glass.

I heard a "bang" sound, and the whole piece of glass burst into shards. It's not that the glass is smashed, it's that the glass bursts. This kind of glass strength is completely unusable.

This is already the 5th failure.

He didn't understand why his glass was so fragile that a slight impact would cause it to burst.

The first time he made quartz glass, he found pure sand, melted it directly with his high-temperature magic furnace, and then flattened it to cool it to get a piece of quartz glass. He excitedly went to his teacher with the glass, ready to surprise him. Probably so excited that he accidentally hit the door frame, and then, the whole piece of glass burst open, cutting several pieces of his hand.

He was blindsided at that time, could it be that he felt wrong, or was his body stronger in the other world, and he didn't feel much strength, why did the glass break? And it was so individual.

At first, he thought that he had made a mistake, or that the quartz glass process was more demanding, and his clay workshop could not achieve it. After thinking about it, he made it again according to the ordinary glass recipe.

Originally, he chose quartz glass because it was easier to explain - after having a high-temperature furnace, he wanted to burn everything again, just like a child has a new toy, and when he burns sand, he will burn quartz glass.

Now there is no choice but to change the formula and return to tradition.

He put pure sand, soda ash (salt lakes produce alkali), limestone in the furnace, and began firing. During this firing, the raw material quickly melted into a liquid state, and the temperature required was much lower than that required for quartz glass.

Jiayi was secretly excited in his heart, thinking that he could succeed this time, no wonder he had to add soda ash and limestone to burn glass, and the temperature required was much lower.

Unfortunately, the wish was good, and after he smashed the newly made glass with a small stone, the glass burst again. In fact, before he tested it, he already had this premonition, but he didn't give up, and he still wanted to struggle.

Everyone is glass, why would I explode and you wouldn't.

In the days that followed, Kaichi tried his best to improve the glass process. He first changed the ratio of the glass composition, but after it had no effect, he wondered if there was a problem with the cooling of the finished glass.

He then tried to change the cooling method of the glass after it solidified at high temperature, and the glass was not easy to crack when poured hot water in winter, probably the glass was not cooled well enough, resulting in small cracks, so it was easy to burst, he thought.

He first let the glass cool naturally, but failed, then tried to keep it in the furnace to keep it warm, and cooled it slowly, but it still failed, and at the beginning, he used magic to blow cold air to speed up the cooling, but it still failed, and finally, he became angry, and threw the red-hot glass plate into the cold water, imitating the quenching of iron, and the failure of the failure, this time, cracked directly in the water.

Jia Yi couldn't think about it anymore, and he even had some doubts about whether the physical rules of the other world were different, and it was impossible to make suitable glass.

Just like the gunpowder that was configured last time, it was not very powerful, but the smoke was very large, like a smoke bomb.

(That's because there's a problem with your proportion, and the gunpowder doesn't burn enough, and that's what you have on Earth.) ）

He felt he couldn't do it behind closed doors and that it was time to seek help from the sidelines.