I am a primitive

This iron is really a good thing!

No wonder Shenzi spent so much effort to make it out of iron.

Looking at these magical weapons, everyone in the Qingque Tribe sincerely admired the wisdom and behavior of the Son of God.

Some people think of last year when the Son of God was determined to burn the charcoal, and they feel even more reverence in their hearts.

No wonder Shenzi spent so much effort to burn the charcoal. It turns out that the biggest purpose is not to eat barbecue, but to refine this incomparably precious iron...

While the rest of the Qingque Tribe were lamenting the usefulness of the ironware, the first carpenter of the tribe was lame, but frowned.

He was holding the saw with a wooden handle in his hand, and most of the saw body was stuck in a thin tree trunk with the mouth of a bowl in front of him.

Not only is he frowning, but Han Cheng is also frowning.

This iron saw, the only one of the Qingque tribe, was used to saw wood. It was very easy at the beginning, and after a while, the saw was nearly three centimeters deep.

The speed will slow down further down, and it will become slower and slower. By now, it has been completely stuck inside.

Han Cheng is no stranger to sawing, which is an essential tool for carpenters in later generations. It is used to saw wood at a very fast speed.

Even if it is not fast, the phenomenon of jamming the saw should not occur.

How could the saw made by myself be bitten to death by wood?

Is the wood from the primitive era too hungry, or is the saw made by yourself too thick?

Han Cheng frowned and scratched his head.

After careful observation and comparison with the saw in his impression, Han Cheng finally found the problem.

The key is the sawtooth.

In the saw made by Han Cheng, the saw teeth are perpendicular to the saw surface, while the saws of later generations are set aside one by one on both sides.

If it is tilted to both sides, the saw gap will be larger, and the saw will not be jammed.

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Once you find the crux of the problem, it will be much easier to do next.

Han Cheng lit the blacksmithing stove again, took off the wooden handle behind the saw, put it back in the stove, and burned it again.

Take it out after burning red, with the saw edge facing up, place it vertically between two stones and clamp it, and then use an iron chisel to tilt the irregular and small saw teeth to the two sides.

In fact, the best way to sharpen the saw teeth is not to hold it on the grindstone as before, but to use a saw to cut a not too deep cut on a log or a stool.

Then take out the saw, turn the saw upside down, with the saw edge facing up, and get stuck in the sawed gap.

Then use the iron file to start attacking the small sawtooths one by one.

However, because the current iron in the Qingque tribe is too little, every piece of iron should play its role to the greatest extent. It is impossible to make a special iron for sharpening the saw, so it can only be temporarily used for grinding. Grind.

"Chichi~"

"Chichi~"

The iron saw handle was held in his lame hand, and he pushed and pulled it back and forth. Fine pieces of sawdust ran out of the saw hole as he pulled it, and fell to the ground sporadically, forming a small pile of sawdust.

The modified saw will no longer have the phenomenon of pinching the saw, and it can be used to saw wood very smoothly.

The first carpenter is lame, like a child with a new toy, sawing wood with a saw and never stopping.

It is said that the saw was invented by the legendary carpenter Lu Ban after he went to the mountains to cut firewood and was cut by thatch.

Now that there is a time traveler like himself, Lai, a person who is gradually moving away from the carpentry industry and slowly rising, has no chance to be pulled by Maocao, and then he has an idea to invent a saw.

"Click"

The hard wood finally couldn't bear the torture of the saw, and was cut in half, breaking in two at once.

The fracture is very flat, and it still feels a little hot to the touch.

This is rubbed by the saw.

He squatted on the ground with a limp, looking at the extremely flat wood cut, with admiration and emotion on his face.

Such a flat cut was something he had never thought of before.

He was also amazed and moved by the much faster progress than burning with fire.

Iron tools are so useful!

This is his sincere emotion.

Lame, holding a saw in one hand and an ax in the other, looked at the wood on the ground and became very confident. With these tools, he will be able to make more useful and beautiful things!

"Brother Cheng, what is this?"

Bai Xuemei squatted aside, pointing to the fracture of the wood and inquiring curiously.

The ax-wielding lame also slowed down, wanting to hear what Miko had to say.

There are circles in the wood, something they only recently discovered.

In the past, when cutting wood, the thin ones were broken by hand, and the thick ones were burned with fire. The incisions were never flattened, so the annual rings inside the wood were never found.

"This is the annual ring."

Han Cheng said with a smile.

"Annual rings?"

"Annual rings are the age of a tree, and every year it grows, there will be an additional annual ring in the trunk.

Bai Xuemei tilted her head and thought for a while, and after she understood what Han Cheng said, she squatted on the ground happily and counted circles.

"One year, two years, ... eight years, brother Cheng, this tree is eight years old!"

After Bai Xuemei counted the circles clearly, she shouted excitedly at Han Cheng.

The child bride-in-law, who discovered the novelty, was very happy, and ran around to count the wooden rollers that were cut off by lame.

"Brother Cheng, this tree is ten years old... this one is nine years old..."

Cheerful chirping sounds kept ringing, surrounding Han Cheng.

Shi Shi, who embraced the dream of flying, taught those of the original bone tribe to learn a few words in Mandarin, and then surrounded him to watch the lame use iron tools to make utensils.