"It's amazing!" King Kong looked at Zhao Yunxiang in shock, he was dealing with the lemon shark at the moment.

The shark was killed by Zhao Yunxiang, who used a stone spear to cut off the shark's back, and the Achilles' heel of any creature was in the central nervous system in the neck area.

After dealing with the shark, Zhao Yunxiang turned to stare at the sea again, and the blood of the lemon shark did not attract other sharks.

This shark is 1.7 meters long and weighs about 120 pounds, which is enough for the tribesmen to eat a few meals.

Because of the shark capture, everyone in the tribe admired Zhao Yunxiang, especially King Kong, who was flattering Zhao Yunxiang.

Seriously, a woman as strong as an ox really didn't interest him.

"I'll eat sharks today, and tomorrow I'll find a way to catch prey, some wild boars or wolves. Zhao Yunxiang still wants to go deep into the mainland, first, to find all kinds of plants, and second, to find minerals.

Nowadays, there is cuprite ore, which is commonly used for wires and cables, copper pipes, etc., and if you forge weapons directly, the texture of weapons will be very soft.

After all, brass has a very low hardness and is heavier.

If you want to use copper to make blades, you must first find tin ore and lead, which can greatly increase the hardness and toughness of copper.

King Kong and others are breaking down sharks, which are cartilaginous fish that can be easily cut with a stone knife.

King Kong and others generally use bone tools, this is the first time to use stone tools, and they were surprised to find that this seemingly ordinary stone flake is actually so easy to use.

"Divine Alpha, what is this weapon, and why is it so easy to use?" Lin Hao glanced at the stone spear and found that the spear blade was extremely sharp and could easily cut through meat.

"This is a spear blade made of quartz, and the piercing power is far from comparable to that of a bone tool, and if you want to use it, I can teach you how to do it. "Zhao Yunxiang knew that it would take some time for the production of bronzes, so he could let primitive people understand stone tools first, and then make bronzes.

Of course, cuprite also contains small amounts of limonite, which can be reflected into iron by adding hydrogen and carbon monoxide at high temperatures.

Relatively speaking, it is somewhat difficult to make iron from limonite, first of all, the melting point of limonite, which is more than 1500 degrees, and charcoal cannot reach this temperature at all, unless coal or coke is used.

The second is hydrogen and carbon monoxide, which is relatively simple or carbon monoxide, car exhaust, plastic combustion, methane, etc. are carbon monoxide.

Zhao Yunxiang has a way to get carbon monoxide, just look in the woods to find it.

"What are you busy with here?" Han Xue Ninglian moved lightly, and she helped the tribe cut the shark meat, and now the pieces of shark meat were roasting on the fire.

"Smelting ......" Zhao Yunxiang wet his body with water, then came to the side of the kiln road and used a wooden stick to pull out a few pieces of copper ore from the fire.

"Do you smelt metal?" Han Xuening had been with Zhao Yunxiang for a long time, and she also knew some industrial terms, she was very curious about what the metal that made Zhao Yunxiang think about it was what it looked like.

"yes, it's copper ore. Zhao Yunxiang took the copper ore out of the kiln fire, cleaned up the charcoal ash, and put some dry firewood in again.

Then hold the copper ore with a wooden stick and try to stay away from the kiln.

After burning, the temperature around the kiln is very high, at least more than 80 degrees Celsius, and you feel like you are scorched all over your body when you stay on the sidelines.

Coming to the tree, Zhao Yunxiang gently knocked the copper ore with a stone axe, and the copper ore that was originally integrated with granite was gradually separated, and the granite had shown signs of carbonization after several hours of baking.

It turns out that as long as the temperature is high enough, the rock will be burned into charcoal by the flames, but the temperature at which the firewood burns cannot completely melt the red copper, but only burns the red copper to a black and purple glow.

"Ding, Ding, Dang ......"

Striking the red copper ore with a stone axe perfectly separates the granite from the red copper, and also separates a small piece of limonite, which is only burned very hot, and shows no signs of melting.

"The temperature is completely insufficient, firewood burning produces a temperature of more than 800 degrees at most, the melting point of copper is 1000 degrees, and limonite is about 1500 degrees...... "Zhao Yunxiang is a little difficult, maybe he has to try to make a blower.

The use of the wind blowing, can increase the temperature of the flame, while speeding up the burning speed of firewood, as long as the wind is strong enough, the temperature after the firewood burning can definitely reach 1100 degrees, there is still a big gap from 1500 degrees.

"Blower ......" Zhao Yunxiang took a look at the outline of the second industrial revolution and found that at the current level, it is completely impossible to make a blower, first of all, there is no metal, and secondly, there is no copper wire to make a motor.

Best of all, there is no electricity!!

"Since it can't be made mechanically, it can be made into a power type!" Zhao Yunxiang thought about it a little, and he already had a plan in his heart.

It's definitely doable, and it's super efficient!

"???" Han Xuening didn't understand much, she just looked at Zhao Yunxiang with her cheeks in her eyes.

"Blowers can be made, but the priority is to find tin and lead, both of which are necessary to make bronze. Zhao Yunxiang weighed the pros and cons and said again, "Otherwise, you have to find coal, as long as you successfully make coal into coke, you can directly smelt limonite." ”

Compared with bronze, Zhao Yunxiang prefers the latter, because steel is the bone that constitutes modern industry, and red copper is the blood vessel of modern industry, and as for bronze, it is basically useless.

"Divine Alpha, what should we do with these?" Lin Hao walked over with the shark's internal organs, he had originally planned to cook them together with the internal organs, but Zhao Yunxiang had said before that he would leave the internal organs.

"Come, I'll teach you how to make shark oil. Zhao Yunxiang looked at a mass of greasy shark offal, some of which were high in fat and could be used for oil refining.

A shark was cut into several pieces and roasted on the fire, and a ball of shark entrails was cut up by Zhao Yunxiang, who first cut the yellow-white liver into several pieces and threw it into a wooden basin.

"Stones can be used to warm the shark's liver, and the high temperature can evaporate the oil in the liver, and the oil flows into the wooden basin, and the stones can be put to keep the oil temperature rising, and the hot oil can be used to refine oil. Zhao Yunxiang told while operating.

Zhao Yunxiang made a clip from a fresh tree trunk, only need to split the trunk from it, obtain a thin slice of the trunk, then bend the trunk to form an arc, bake it on the fire, and then tie it with vine rope to prevent the wood chips from bouncing back.

The damp trunk is very tough, can bend to a large extent, and does not break.

Use a clamp to pick up the black stone burned in the fire, and then place it on top of the shark liver in the wooden basin, only to hear a crisp "zizi" sound, the shark liver leaks oil.

Slowly the oil is getting more and more, the shark's liver is shrinking rapidly, and the fish oil is boiling.

Continue to place the hot stones to raise the temperature of the oil, and then oil the other shark entrails to squeeze out the fish oil from the entrails.

It didn't take long to get about 2 liters of shark oil.

"This fish oil is a good thing, it can treat burns, help with wound recovery, has an anti-inflammatory effect, and can also be used as a lighting to make oil lamps, and it also has a mosquito repellent effect. Zhao Yunxiang placed the wooden basin under a big tree, "Shark oil will solidify after cooling, and it can be stored for a long time." ”。

At this moment, there was a hurried shout from the tribe, and it was several strong men who were on guard, and they seemed to have discovered something.

"Someone has broken into the clan!" Lin Hao hurriedly picked up the bone weapon and ran towards the clan gate.