Fight,Primitive Man

Time has entered the late autumn season, the wild beasts near the tribal alliance have been almost killed, and each tribe is preparing for the winter.

The Panshi tribe has enough winter reserves.

After two checks, Chudong was basically certain that as long as there were no major accidents, the various materials for the tribe to survive the winter were enough for everyone to survive a cold winter.

Chudong is still very busy every day, and other barbarians are also very busy preparing for the winter.

In the afternoon of this day, a craftsman came in a hurry.

On the face of this young man, there is a lingering charm of surprise. It seems that he has just experienced something happy.

"Chieftain, come to the lime stone kiln and have a look."

"What's the matter?"

"When we burn lime, we burn something different."

"What is it?"

The young savage shook his head and nodded again.

"It's like the magic crystal that makes glasses for the Yang warrior."

"Can't you take it?"

The simplest way to synthesize artificial crystal is to use alum. In his student days, Chu Dong, who had excellent chemistry results, knew how to use alum to cultivate crystal gifts.

I've never heard that artificial crystals can be extracted from stone kilns. Do you mean

Thinking of that possibility, Chu Dong quickly put down his work, and the wind rushed to the stone kiln for firing lime.

When Chu Dong felt the stone kiln, he saw that all the craftsmen stopped their work and were watching a big Bluestone.

Seeing Chu Dong coming, everyone scattered and let Chu Dong come near.

On top of the big Bluestone, there are several irregular transparent massive objects, the largest of which is the size of a fist, and the smallest of which is the size of a finger.

Trudon's breathing stopped for a moment because he saw the glass.

There is no mistake. Glass is the most common glass in modern civilization.

The glass in front of us is not transparent, and there are black soot traces inside. At first glance, it looks like some kind of craft work.

But it's real glass.

Chu Dong picked up one of the biggest pieces, and the temperature of scalding was obviously not long after it was taken out of the kiln.

Close one eye and knock the inside of the glass carefully with the other open eye. The transparency is quite good, which is better than that of natural crystal.

"Was it fired in the kiln?"

Hearing Chu Dong's question, Yan nodded.

"When we were cleaning the kiln today, we found that there were some such stones at the bottom. Because they were very smooth and transparent, they looked like crystal, so we asked someone to report them to you."

"This is glass. Inadvertently, you burned good things again. Is there anything else in the kiln? Take them all out. "

Chudong was very happy to see it. Yan and all the craftsmen knew that this "glass" must be very useful.

So the craftsmen continued to clean up the stone kiln and took out more than 30 pieces of glass, large and small.

Chu Dong walked into the high temperature kiln and saw that there were traces of vitrification not only on the ground, but also on the walls of the kiln.

Think about it. Limestone is one of the raw materials for firing glass. But it's not just limestone that can make such transparent pure glass.

For example, quartz sand, feldspar, soda ash, boric acid and so on are raw materials for firing glass.

Chu Dong carefully looked in the kiln and found the granular quartz sand. Quartz sand is the residue of quartz after firing, and quartz is usually associated with limestone, calcite and other ores. It is not surprising to see quartz here.

There are small pits on the ground. I gently point the soil in the pit with my fingers and smell it under my nose. It has a sour smell. My fingers have a slight burning sensation. I'm sure it's a pit formed by acid.

Well, boric acid and the like are also available.

Chudong then came out of the stone kiln and inquired about the use of raw materials for making glass in these days.

fortunately as like as two peas, the rock is strict in demands. Every time he burns lime, he will do it according to a certain amount of stone. So Chu Dong sees the next raw material of limestone.

Chu Dong looked carefully and found some impurities in the limestone. Quartz, borate and granular caustic soda are all in these limestone raw materials.

Chu Dong carefully looked at the other parts of limestone that were ready to be put into the stone kiln. The total amount of limestone in each part was about the same, but the impurities in each part were different.

Some quartzite is more, some borate is more.

Chu Dong took a few small pieces of bluestone and carved Arabic numerals 1, 2, 3, 4 on each piece with a sharp bone knifeThen, Chu Dong put the number marked bluestone pieces on the separated limestone.

"Rock master, after firing these portions of lime, we will observe whether there will be glass and how pure the glass is. The purity of such glass is relatively high, and the purity of such glass is relatively low. "

Chu Dong picked up two pieces of glass and explained to Yan et al.

"When we find out which part of limestone is more pure, we have to leave the corresponding flakes. Do you understand?"

"Yes, chieftain."

Yan nodded, and then asked Chu Dong: "chieftain, what is this to do?"

"This is one of the most common methods of testing, called comparative testing. Each portion of limestone is basically the same, the only difference lies in the ingredients. That's it. You see, this is borate, this is quartzite, this is caustic soda particles. With these ingredients, mixed in the main material of limestone, will form a different glass purity

Yan nodded to show understanding.

It takes a long time to burn limestone into quicklime or even the attached glass.

Chu Dong is very patient to wait for the results of each firing experiment, but at the same time, there are still many things waiting for him to deal with in the tribe. He is lack of skills, and can only try his best to teach these craftsmen to have the preliminary spirit of scientific experiment.

Fortunately, Chu Dong's words are God's words, and craftsmen will do it meticulously.

Finally, Chu Dong will summarize the analysis and conclude the best ratio of various raw materials for firing glass.

At this time, Chu Dong could only trust everyone in the tribe. After all, he was not a real God. What he needed was to mobilize the enthusiasm of everyone in the whole tribe and let the people in Panshi tribe grow up.