A few days later.

Ye Qing found the young witch.

He looked at the young witch with a smile and asked with gestures.

“Is salted fish delicious?”

The young witch and her female tribe members have been collecting the work these days, which is no different from the content of their work in the tribe.

The difference is that the variety of tools of Fangfeng’s family opened their eyes.

Compared with the work efficiency of the bone horns, wooden plows, stone knives they used in the tribe, the bronze heads, shovels, daggers and other metal tools, is completely incomparable.

It takes them half a day to dig the kudzu root with bone horns, wooden plows and stone knives.

And if you use bronze to get the head and a few hoes, you can dig out the kudzu root.

It won't take long to dig out a lot of Pueraria root.

She was even more surprised at breaking the bamboo, splitting it into bamboo strips, weaving it into a basket, a basket, a basket, etc.

They have also seen bamboo.

But they never thought that bamboo could be used like this.

The dining situation of the tribe surprised her even more.

Here we have three meals a day.

Meals are all eaten!

Wild vegetables, seeds, etc., are eaten less.

She now has no patterns on her body.

He also learned from the Fengfeng clan members, tied his hair bun on his head, then changed out of the animal skin on his body, and put on the clothes given to her by Ah Xing.

But she couldn't figure out things like Bu no matter what.

How is the cloth made of something tight, sturdy, smooth and soft, extremely lightweight when worn on the body?

Since the Fengfeng family had a loom, they no longer needed their tribesmen to use the original waist-woven fabric.

However, the loom was in a closed wooden house, and she had no chance to see it with her own eyes.

So, weaving, young witches have no concept.

Ye Qing and she had a very difficult time asking about her well-being and chatting about family matters.

Seeing that it was really hard, I finally asked directly:

"Your tribe has three tribes in the mountains. If you let them surrender to the Fangfeng clan and let them live the life you are now, would you say they would be willing?"

After understanding the meaning of Qingqing, the young witch thought for a while and then danced excitedly.

She means that they will definitely be willing.

Life here is so good!

Ye Qing continued to ask:

"So are you willing to go into the mountain and persuade them to walk out of the mountain and surrender to the Fangfeng clan?"

The young witch readily agreed.

She is very smart. Although she has not experienced any struggles such as power and intrigue, she also feels that it is better to have more tribes around her because of biological instinct.

Humans are social animals, and with more people around them, their sense of security will greatly increase.

Ye Qing smiled and nodded and said:

"Okay! You will enter the mountain tomorrow, and there will be members of the Fengfeng clan who will follow you."

He planned to let the last reconnaissance team follow the young witch into the mountain.

The road to the mountain is not close or familiar, and it is not very convenient to enter too many people rashly.

Let the reconnaissance team understand the situation first and decide according to the situation.

Ye Qing has a pathological desire for the population.

The total population of the three tribes in this mountain is more than 100.

In addition, language customs, etc. are different from that of this tribe, and it will be a bit difficult to digest, but this cannot eliminate his desire for population.

He doesn't want to let go of these more than 100 people.

No matter how small the legs of a mosquito is, it is still fleshy!

This era is sparsely populated and the population reproduction is too slow!

Instead of letting the small tribes survive and reproduce slowly in various places, he would rather concentrate these populations and work together to create a stable and prosperous settlement.

After ensuring basic food needs, a safe and stable living environment is coming, and the large population is just around the corner.

The larger the population base, the faster the population will be.

So he worked hard to increase the population.

After seeing off the witch, Ye Qing came to the bronze workshop.

He wants to create two things here.

One is a bearing and the other is a gear.

Bearings are not ball bearings, but roller bearings.

Making balls is too difficult.

Even if his golden fingers are powerful and can polish a few balls, they cannot make a lot of them.

The rollers are different.

Continue to improve the metal wire drawing process, you can still get bronze rods with similar accuracy.

Then cut off the bronze rod and after polishing, it will be rollers one by one.

One of his purpose of building a dam was to develop hydraulic machinery.

Hydraulic power is relatively not very powerful. To increase the power of the machine as much as possible, hydraulic machinery needs to minimize the loss of water potential energy during the conversion of kinetic energy and kinetic energy transmission process during the process of converting the potential energy of the water.

That is to reduce friction.

The most effective way to reduce friction is the bearings and gears.

If you make these two parts, there is no big problem with using bronze as raw materials, and there is no problem in design. It just consumes a lot of Ye Qing's brain cells, making him rack his brains to re-remember and review the mathematical and physical knowledge he had learned.

The most important thing is precision.

There are no lathes or the like now, they can only be made by hand. However, hand-made is very casual, which requires accurate measurement tools.

For this reason, he carefully made a vernier caliper.

For vernier calipers, people who know less about daily use may find them tall and generous.

In fact, its basic principle is also very simple...it is the misalignment amplification method.

It's not difficult to make.

The tool of the vernier caliper was also invented very early. Caliper was invented as early as the Wang Mang period of the Han Dynasty. However, the unearthed caliper did not have a vernier.

The difficulty of roller bearing processing lies in roller processing.

Ye Qing first pulled out a copper rod of appropriate thickness through a wire drawing device.

What should I do if the copper rod is not round enough?

Easy to deal with!

Pull it a few times and you will get the accuracy you can use.

Anyway, what he wants to make is a thick and heavy machinery like a water truck, and the accuracy requirements are not that high, so it's enough to have a similar one.

In ancient times, water trucks could be built without bearings, right?

With bearings, it is nothing more than a higher accuracy and a higher output power of the water truck.

Cut the copper rod into cylinders of the same length, and then the rest is water grinding skills, constantly polishing, and measuring at any time with a vernier caliper.

At this time, the bronze workshop also carried out a more refined division of labor.

There are also a group of tribe members who specialize in copper making.

This group of tribe members can be regarded as the first batch of professional copper smiths in history.

This small bronze workshop is the most advanced and top-level science and technology laboratory in this era.

The difficulty in casting is not very high, the hardest is polishing.

This polishing process takes a lot of time and effort.
Chapter completed!