It's like Bodhi asking a monkey to go to a lecture at night.

It's mysterious.

Zhang Jingtao felt that he was the monkey.

Huo Yu is too, it's just itching, in the afternoon, Huo Yu went to pester Ah Ah to ask this and that, Zhang Jingtao also followed, but saw Ah Ah in a daze with a long arrow.

Next to her, there are also a lot of feathers.

Fire Feather asked, "What is this?" ”

"It's a flying weapon, it's just that it's always in the air, so I put a rope on its tail to make it more balanced, but I think maybe it's better to use feathers to imitate a bird's tail." ”

As soon as Huo Yu heard the excitement, he immediately asked Ah Ah to try the arrow.

Ah didn't shirk it, but tried the arrow with her.

Immediately after the arrow, Fire Feather's back was soaked.

Why?

Because Ah used armor-piercing arrows, all steel!

Razor-sharp! Extremely strong armor-piercing ability!

Even the bamboo shield can't stop its armor-piercing ability, it can penetrate the bamboo shield and expose half a foot of arrow body behind the bamboo shield!

If it hits the gap of the bamboo shield, it may be able to directly penetrate the bamboo shield and shoot people to death, and even, although Ah Yu has not tested it, in fact, Zhang Jingtao knows very well that such an arrow can pierce the thin steel plate and injure people, which is no less powerful than a firearm!

In particular, Ah He also smiled and said, "In the future, we Silk Clan will use a thousand or even ten thousand people to shoot such armor-piercing arrows at the same time." ”

Huo Yu's legs suddenly went limp, and she felt that she was very unlucky, but her legs were about to be weak.

After returning home, Huo Yu regained her composure, because she had already made a decision in her heart, the future of the Yu clan had to be controlled by herself.

And Ah, he also decided to use feathers to try to make the balance of the arrows better, especially if there are feathers around who are very familiar with feathers, you can ask about the characteristics of feathers.

Ah Hao first applied fish glue to the arrows.

This kind of fish gelatin is made because when Ah He eats fish, just like when she and Fu Xi were adventuring in the field before, they don't eat fish offal, including fish bladders.

Ah He made clay pots, and once killed a lot of fish, he collected those fish bladders, put them in clay pots, and stewed them in the fire hole, originally intended to be eaten by wild boars raised in captivity.

If you want to stew something, it doesn't hurt for the pig to eat it.

This is the experience gained by Ah Ah after using fire to process plant seeds, so that many apes can eat seeds that they do not digest.

And since it is for pigs, naturally there is no need to stew it carefully, and in order to prevent the water in the clay pot from boiling, for this reason, the clay pot is placed on the side of the fire, and it is not directly burned on it.

So, in that less than 100 degrees of baking, this pot of fish maw turned into glue.

This fish gelatin is usually used by Ah He, because the toner gives her the feeling that it can make many things stronger.

Of course, this fish gelatin is very powerful! The adhesive is strong, waterproof, and can unravel the adhesive after heating, which is a very convenient and safe glue.

Fire Feather watched in surprise as Ah hi tied the feathers, which was tied with a thin rope stuck into the feathers.

Before, Ah Yu didn't think of tying feathers like this, but she thought that this way of tying seemed to be different from the tail of a bird, so she used a floating feather method, that is, hanging a little feather, so that the feathers were like a bird's tail, floating at will at the end of the arrow.

However, the effect is extremely poor.

And the fire feather, in fact, does not understand the application of feathers too much, but when she said a word, she reminded Ah Hao how to tie the feathers.

Because of the fire feathers, it seems that the tail feathers of birds are only used to maintain the balance of the bird's body, and the feathers of large birds are usually longer.

So, it suddenly occurred to him that the feathers themselves should be more balanced, and they may not have to completely imitate the tail feathers of birds, after all, the arrows are not birds, and the shape is different.

Arrows have the balance needed for an arrow.

So how can the arrow body be more balanced?

When he thought of this, he immediately thought of the triangular arrows that could make the arrows more stable when he tested the stone arrows in the past.

"Three-wing tail!"

Ahmad immediately decided on the plan.

Sure enough, the arrows made in this way were very useful, and the arrows were so stable that they did not tumble, so that the distance and power of the bow and arrows increased.

Ah Ha was happy and discussed the bird business with Huo Yu.

The Yu people are very good at hunting birds and pheasants, and they can provide a large number of birds and birds, and they are also good at touching the birds' nests.

Ah He, on the other hand, plans to raise the birds and chickens he catches in captivity, so that he can get a lot of feathers like rabbit feathers, such as the big white goose.

Besides, Ah also likes chicken soup, so it's a good idea to let the Yu clan catch more pheasants.

At night, Zhang Jingtao, Mrs. White Bone and others, as well as a group of babbling children, opened a pair of bright big eyes together, and looked curiously at Ah He, who brought candles, bamboo tubes with holes, and a concave lens.

This concave lens is made by putting a piece of softened glass into a bamboo mold, and for this reason, the surface is not very smooth.

But this mirror has been polished by the very patient Chu girl, and it is already enough, because after the primitive people learned the weaving and weapon production of the silk clan, the most accustomed work is to grind.

Moreover, this glass was used by Ah Ah with the concept that alkali can clean dirty oil, and after the alkali is integrated into it, the degree of clarity is very amazing.

It's almost like a modern concave and convex lens.

For this reason, Zhang Jingtao has no doubt that Ah Yu also made a convex lens.

Sure enough, Ah Yu didn't do the experiment first, and took out a convex lens, and said to everyone: "Last winter was very cold, snowing, frozen, I poured out the ice in the bowl I made, but because I thought this arc-shaped ice cube was beautiful, I used water to combine the two pieces of ice together, and after one night, they froze into a convex lens, and then I found that it can gather sunlight, for this, I created a word." ”

Zhang Jingtao immediately thought of what the word was.

Spirit!

Sure enough, Ah said: "This is a spirit word, and in the spirit word, the word Yi on the fire word is an ice word." ”

The ice sound that Ah said is, of course, the pronunciation of the word 彐.

But undoubtedly, this is not the word snow that people think, the word snow, and the composition of rain, that is, it is called snow if it is like rain.

The word 彐 is read as ice.

Ah He wrote this character on the wooden board, and said: "I found that after the water froze, the volume became larger, so I expanded the 'one' that can represent the surface of the water and the water to the upper and lower sides, indicating that after the water became cold, it froze and became larger." ”

Zhang Jingtao nodded nonsense, despite this word, he had already figured it out when he explained the meaning of Lingjun in Lisao to the Confucian people before.

People who can understand that the volume of water turning into ice will expand, and only then can they form the word Yi, which can be described as ice and snow smart.

That's how ice and snow are linked to cleverness.

Of course, the meaning of the word 彐 does not stop there.