21 - 01-08 Natural rubber
"I knew I couldn't get a refrigerator. ......"
Jin has given up. He has thought about building a refrigerator to store food, but he is overwhelmed by the lack of materials. At least a water-based magic stone (magistone) would be nice.
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"I guess fire-type magic stones (magi stones) were found because there are volcanoes in the area. If that is the case, then it would be impossible to find a water-based Magi Stone.
It is said that there are few water-based Magi Stones in the natural world.
"Maybe we can make them if we go to the royal capital. ......"
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So, Jin gave up on making a refrigerator for the time being, and instead, he worked on something else, something related to <
Jin's plan was to sell the stove manufacturing process to Roland again. In doing so, he would like to make the magi stone of the fire system from the Herme River a specialty of the village, and make it a source of income for the village.
Then, the problem that Roland will have to deal with when he transports the magi stone by horse-drawn wagon is the time and effort required for the transportation. If the cost is too high, the village may be forced to purchase fire-type magical stones (magi stones) from other sources. In conclusion, it was necessary to improve the transportation.
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(There is a difference in elevation between the royal capital and this place, isn't there?)
From what I have heard, the altitude of Kaina village is about 1000 meters above sea level. This is the reason why this village is located in the south and is relatively comfortable in summer.
(The return trip is fine, but it must be difficult to come back.)
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The return trip with the load is downhill, but the outward trip is so difficult that the frequency of visit is only once in two months.
"Oh, I'd like to develop a motor or an engine.
That would be possible in a research institute, but not here. If that's the case..,
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"I guess we could improve the horse-drawn carriage. ......
Jin concluded that he had to find out what he could do to improve the carriage.
"It must be equipped with bearings so that the horse can pull easily.
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He thinks about what he can do now.
"I want to use rubber for tires, don't I? That would mean finding a tree where natural rubber can be harvested.
When I worked part-time at a camera shop, I heard about a resin called gutta-percha. It is not rubber from a rubber tree, but a resin from a tree called "something," and a famous German camera maker put it on his camera.
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The tree is found in China and other countries, and its bark is said to be used to make a healthy tea.
I wondered if that tree produced white sap for the tea we drink in this village.
So I decided to check it out. Then, Hannah was the one who knew more about it.
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"Hannah, let's go pick tea leaves.
she says,
"Yes!
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she would answer immediately.
So they took a small basket and went into the forest.
"There it is, this tree!
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The villagers call it the tea tree.
"Okay, let's pick the young leaves and pick them."
"Yes."
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A tree that grows abundantly in a corner of the forest. When you tear off a leaf, it makes a sticky string. This is the raw material for rubber.
Having learned the characteristics of the trees, Jin went back to the forest again, this time alone, after gathering leaves for tea.
"I don't want to over-gather and let it die," he said.
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He scratched the trees here and there, and tied plates to catch the sap that would seep out, so as not to destroy the environment.
"All right, if we wait until tomorrow, we'll have quite a lot of sap.
I try to imitate a rubber tree sap collector I saw on TV or something.
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While the sap is accumulating, I go back to work on the bearing.
"What are you going to do next time, my dear?"
Hanna is amused by Jin's recent attempts to create various things with magic.
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"Well, watch and see. ...... transforming (forming)."
"Wow, that's interesting!"
A lump of iron is transformed into a sphere in an instant. There are several dozen of the same size, down to the micron. This is the kind of precision processing that only a magical engineer, a magecraft master, could perform.
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Carburizing
A magic to make iron contain carbon, Jin's original. By this process, the mere iron is transformed into strong steel.
In the same way, the outer ring, inner ring, and ball retainer are made and assembled to complete the ball bearing. Since they have been hardened (hardening), their durability is unquestionable.
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"What's this?"
The finished product was something that Hanna did not understand, so she looked bored and went out to help prepare dinner.
Jin smiled and prepared a wheel and a shaft of the right thickness for the bearing. The day ended with the conversion of Hanna's water cart to a wheeled cart with bearings.
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The next morning, Hanna came back from fetching water,
"Did you do something to my cart?
"You know what I was making yesterday? I put it on.
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Jin said,
"It's been moving very lightly, so I thought it was you who had become so powerful," said Jin.
He looked at Jin with a disappointed but happy face.
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"Well, what about the natural rubber?
After breakfast, Jin went to the forest to see how the sap was accumulated.
"Oh, there's a lot of sap.
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The plate that Jin had put on was almost full, so he put it in the bucket he had prepared and continued to collect the sap.
"Well, next is vulcanization.