Although Wang Lang explained the shortcomings of this copper saw to them, such a sharp tool was destroyed by Wang Lang, and people's hearts seemed to be dripping blood.

Huo squatted down and stroked the copper saw with a very painful expression, and said in a choked voice: "Lang, it was not easy for us to carry these stones back and make this saw, even if he is not durable, but it is much better than the stone axe, why did he smash it like this?" ”

Wang Lang looked at the fire that was almost crying, and he couldn't laugh or cry, and said: "This one is broken, let's re-melt it and make it again, this copper is not as bad as a stone, it is useless." ”

"That's right! Why am I so stupid, tin is like this, after it breaks, just melt it again and make a new one, this thing called copper must also be fine. When Wang Lang reminded him, he immediately became excited, took the copper saw that was broken in two, and threw it into the furnace to be smelted again.

Looking at the excited and forgetful fire, Wang Lang grabbed him and said: "You don't look at what time it is now, it will have to be re-smelted tomorrow, not to mention that you can't smelt it directly like this, I added tin to it, and if I don't separate it, what I make again is still no different from the current one." ”

Huo looked at the dark night around him, and then realized that it was already night, and smiled a little awkwardly and said, "I'm so excited." ”

Bark patted Huo's shoulder and said with a smile: "You see that you are in a hurry, when the leader makes a mistake, can you think of the leader who can't think of it?" ”

Fire glared at the bark that was winking at him, scratched his head, and said, "Why do you want to mix copper and tin?" ”

Wang Lang explained: "Simple tin and copper are too soft, the use is limited, and copper and tin mixed together can be extremely hard, but how much copper is put and how much tin is put has a great impact on what is made, I still don't know how to mix it to get satisfactory results, so I can only keep trying." ”

Wang Lang explained a lot, people only understood that the two metals were smelted together more powerfully, as for the proportion of the problem, it sounded like a book in their ears, but they didn't bother to ask Wang Lang about such a complicated matter, these problems naturally had to be solved by Wang Lang, and they only needed to contribute when the time came.

I have seen the sharpness of the bronze, and I didn't sleep well all night, and the next morning I got up early when the others were still asleep, and I couldn't wait to do a big job, but when I saw that the people were still asleep, it was not easy to wake them up, so I could only walk back and forth in the tribe with great irritability, and go to see the charcoal kiln for a while, and check the copper ore for a while, as if these things would disappear if I didn't pay attention to them.

Half an hour later, people gradually woke up, and saw the fire squatting motionless next to the copper stove, and they were very puzzled, not knowing what he was doing.

Bark yawned, walked up behind the fire, patted him on the shoulder, and said, "What are you doing when you get up so early and stare at the stove!" ”

Due to his overconcentration, the fire was startled by this sudden suddenness, and when he turned around and saw that the people had already woken up, he suddenly came to his senses, ignored the yawning bark, walked to Wang Lang's side and said, "Lang, let's start making saws!" ”

Wang Lang touched his rumbling belly, looked at the fire a little helplessly and said: "Everyone is hungry, what are you anxious about, let's talk about it when you are full, copper smelting is not something that can be completed quickly, how can you do it without physical strength." ”

Hearing Wang Lang say to eat, Huo's stomach also screamed, and he smiled a little embarrassedly, knowing that he was a little too anxious.

After a simple meal, Wang Lang asked the copper saw broken in two to be smashed into very small pieces with stones, and the smashed pieces were put into a crucible and calcined on the fire.

Due to the difference in the melting points of tin and copper, it didn't take long for a white liquid to separate from the fragments, and after all the fragments were no longer flowing out of the white liquid, Wang Lang used chopsticks to clip out the unmelted copper.

Although this did not separate all the tin from the bronze, the tribe now had relatively little tin, and even if only a small amount of tin was separated, it was a very important material.

In order to determine the copper-tin ratio, Wang Lang planned to make a simple scale.

As long as people who have studied physics will have some understanding of the lever principle of the scale, Wang Lang asked people to find a straight branch thicker than the thumb, and used it as a scale rod, and chose a stone the size of an egg and tied it with a rope as a weighing stone.

In the next few days, Wang Lang made all the copper ore he brought back into copper bricks, which were about the same size and weight, and Wang Lang decided to set the weight of this copper brick at one catty.

With these copper brick scale rods can be determined, Wang Lang spent a day to fix the star and the rest of the scale, looking at the simple scale in his hand, the error must exist, but these errors do not have much impact on what is about to be done.

Although Wang Lang did not know the best copper-tin ratio for bronzes, Wang Lang knew that it would definitely not be a 1:1 ratio, so Wang Lang weighed four parts of copper and tin with different proportions, and put the raw materials of copper two taels tin one tael to copper five taels tin one tael next to the copper furnace.

These days, although others can't understand what Wang Lang is doing, they now know that all the preparations have been completed.

Lin Huo waited for several days in his heart, and at this moment he was finally able to refine those magical things again, and Huo said excitedly: "Lang, can you start?" ”

Wang Lang nodded and said, "It's okay, let's start with the small ones!" ”

Huo responded excitedly and put the raw materials of copper two tin one into the copper furnace.

Due to the relatively small number of raw materials, in less than an hour, a red liquid flowed out along the groove, and the prepared container was immediately placed under the groove, and the received solution was poured into the nail mold.

In half a day, people smelted all the four parts of copper and tin in different proportions.

At night, Wang Lang asked people to take out the molds in the puddle, and after breaking the clay molds, four yellow copper nails appeared in front of the people.

Since the nails made last time had not yet been used, Wang Lang had people smash them all, so people didn't know what to do when they looked at the four nails in front of them.

"Chief, how do you use this thing!" Kong Yi asked.

Wang Lang said: "This thing is used to connect wood, but it is useless now, I just use it to try the effect of copper." ”

Wang Lang determined that the method of making the bronze effect was to use stones to smash it, so as to determine the one with good hardness and strength.