At night, the outside of the cave was pitch black, and with the light of fire, you could vaguely see the rain hanging from the entrance of the cave like a waterfall.

In the dark night sky, occasionally a thick lightning flashed through the sky and fell in the jungle in the distance. I don’t know how many trees turned into ashes on this rainy night.

Because people were too tired, even though there was constant thunder outside, people still fell asleep with peace of mind.

In the early morning, the rain weakened, and the raindrops dripped intermittently on the puddle at the entrance of the cave, making a slight sound.

After a night of rest, although the muscles on the body were still a little sore, the tired bodies were relieved a lot.

When people walked out of the cave, the scene at the foot of the mountain made people's faces turn pale.

Floods, floods are everywhere in front of you. The surging floods knock down trees, roll up soil and stones. A large number of animal corpses rise and fall in the dirty water flow, and there is a faint smell of fishy smell in the air.

Looking at such a large scale flood, Wang Lang couldn't help but secretly glad that if they had not arrived in this valley in time, they would have been swallowed up by this terrifying current and become one of the corpses on the water.

The foot of the mountain has become a vast ocean, and people cannot go down the mountain at all. Before the flood recedes, they can only stay on this mountain.

On another mountain not far from the cave, a large area of ​​landslide occurred. The soft soil on the surface of the mountain was washed away by rain, and a large number of plants were buried in the soil. The rocks under the soil were exposed outside. Wang Lang looked at the hill full of protruding rocks where he was, and felt that there should be no danger of landslides.

"Lang, Lang, come and see what this is!" A scream of exclamation rang out in the cave.

People looked back in surprise and saw Fanxing and a few women curiously fiddling with the ashes on the ground with branches.

People walked over curiously, wondering if there was anything wrong with a bunch of useless ash.

As the ashes were gradually pushed away, a layer of white matter was seen covering the rock below. Wang Lang looked at these silver-white things and his eyes lit up. This thing was obviously some kind of metal. Wang Lang first reported that it was silver, but then he denied it. These things were obviously formed after melting. His chemistry knowledge had not been completely returned to the teacher. The melting point of silver should not be so low.

Wang Lang squatted down and pressed the white substances with his hands. These things were very strongly stuck to the rock. Wang Lang picked up a stone and knocked it hard, making a "dangdang" sound.

Only a few uneven pits were left on its surface.

"Make a fire, make a fire!" Wang Lang shouted excitedly. If he had not guessed wrongly, this thing must be tin. This is the first metal he discovered when he came to this world, so he was naturally very excited.

People looked at each other. Although the thing looked beautiful, Wang Lang had been very calm since the leader. I don’t know why he was so disobedient this time.

Seeing that people did not take action, Wang Lang said dissatisfiedly: "Why are you still standing there? This thing is a treasure. Make a fire quickly."

When people heard that it was a treasure, they suddenly felt energetic. Every treasure Wang Lang said brought great benefits to the tribe.

Fire is the best at raising fire in the tribe. After hearing Wang Lang say something about treasure, his eyes shone brightly. Without saying a word, he found something to cause fire. The dry wooden stick rotated rapidly in his hand. Not long after, sparks appeared at the front of the wooden stick due to friction. Fire carefully took the wooden stick to the hay prepared on the side and kept blowing. Not long after, thick smoke rose from the hay, and the flames suddenly started.

After the fire was born, Wang Lang picked up some scattered gravel in the cave and told them to throw it into the fire.

As the flames burned, only some silver-white stones mixed with slowly cracked, while the rest did not change in the fire.

As the silver-white stones continued to heat up, liquid slowly flowed out. Wang Lang smiled so hard that he could hardly stop talking about these silver-white metal solutions.

"Metal! This is metal. Even the worst metal is countless times better than stone!" Wang Lang was ecstatic.

When Wang Lang was in school, he heard from his teacher that humans discovered that the earliest metals were tin. It was because of the low melting point of tin that there was no need to build any kilns to melt them. They only needed to be calcined with ordinary flames to melt them.

People watched these magical stones turn into liquid in the flames, and they opened their mouths in disbelief.

Although metal tin has a soft texture and is not even harder than stones, this thing is an indispensable thing for future development. As long as copper ore can be found in the future, this metal can be added to make bronze. As long as bronze appears, you will have no rivals in this world.

Although tin is softer, it has better plasticity as a metal than stone. As long as it is polished, it can be used as an arrow spearhead. Even if it is blunt, it will be extremely sharp after being ground.

Thinking of this, Wang Lang, who was extremely excited, hurriedly ran outside the cave and found some yellow mud on the hillside. After taking these things back to the cave, Wang Lang picked out the gravel from the yellow mud and took a little water to pour it on the mud.

People don’t look like they want to burn pottery when they see Wang Lang, and they don’t understand what Wang Lang is going to do, but seeing his excited look, they also know that this must be a very important thing.

"Fire, come over with an arrow and a spear!" Wang Lang said without raising his head.

After hearing this, Huo immediately took an arrow from the quiver and handed it to Wang Lang, and then placed a stone spear next to Wang Lang.

The arrows used by people are extremely simple now. The arrows are made of triangular stone pieces. A groove is carved at the top of the arrow shaft, and the stone is stuck in the groove and tied with a rope. Such arrows are very unstable. Of course, it is possible to deal with humans who don’t even have a piece of clothing, but for wild beasts with thick skin, they can only stab them but not fatal.

Wang Lang didn't plan to use metal to make such arrows, and doing that would be a waste.

Wang Lang put the cured mud on a relatively flat stone, used a straight spear as a rolling pin, pressed the yellow mud into a palm-sized cake shape of five or six centimeters thick, and then cut the thing into two neat rectangles of about the same size with a stone knife.

Next, Wang Lang used an arrow shaft to press a semicircular groove on each edge of the two pieces of mud, then used a wooden piece to carve two scratches of several millimeters along the shape of the groove, and then used a wooden piece to carve a cone shape on the top of the groove, and finally used the pinched mud piece to seal the top of the groove.

After doing these, Wang Lang put these two simple molds into fire to calcination. It is logical that firing pottery is more ideal, but in today's situation, Wang Lang does not have the conditions to do such complicated things. As long as these two clay plates are hard, they should be able to use them.

Half an hour later, the template was successfully fired. Although there were some cracks, it did not affect the use. Wang Lang used a stone knife to polish the clay board and put the two clay boards together. However, this purely handmade thing was not very accurate, and errors could be seen with the naked eye.
Chapter completed!