I am a primitive

Otherwise, why would Shenzi leave without saying a word?

Fortunately, it didn't take long for Han Cheng to come out of the room, walking quickly all the way here.

He didn't hold an orange in his hand, but a piece of thin hemp rope.

Under the curious and puzzled eyes of several people, Han Cheng pulled out a small noose from one end of the rope, and tied the other end to the thin stone pen.

Find a tree trunk as thick as a little finger and insert it into the noose, and a simple compass is made.

To draw a circle freehand, Han Cheng does not have this ability, this skill is generally only those master painters, or senior teachers who have taught mathematics and geography for many years can do it.

Fortunately, one of the characteristics of human beings is the use of tools.

Under the probing eyes of several people, Han Cheng first wiped off the messy marks on the granite, and then compared for a while, roughly finding the center of the stone.

Stand the small stick there, press it tightly with your hand, hold the stone pencil in the other hand to straighten the rope, and then use your hand to make a circular motion around the stick.

Under the surprised gazes of Wu, Shishi, Lie, and Wood, a very standard circle appeared on the stone slab with ease.

Several people looked at the circle, at the tools in Han Cheng's hand, and at each other, all quiet for a while.

The matter that made them feel sad and lost their hair was easily solved like this?

(The process of making brine is a bit of a problem. Book friends, don’t be too serious, and don’t try this method, because I can’t guarantee that it will be brine. After all, there are a lot of impurities in the salt mine...)

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"Come on, use a drill to come here and leave a mark."

Seeing the dumbfounded look of Wu and the others, Dashenzi Han, who was very grateful, pretended to be calm, and stretched out his hand to point at the mark he had twisted out with a wooden stick.

Here is the center of the circle, mark it at this time, save time to find the center of the circle again.

"Ah good!"

Staring at the simple compass in a daze, the wood froze for a moment, and quickly chiseled out an indelible mark with a chisel.

Han Cheng used the same method to draw a circle on another stone slab with the same radius as the previous one.

This time, Han Cheng didn't need to say anything, Mu Mu consciously chiseled out a shallow groove along the circle with a hammer in one hand and a drill in the other hand.

As for the simple compasses, they were already in Wu's hands.

Like a child who got a novelty toy, he left circles of different sizes on the ground and never tired of it.

Stone and Lame Two people who wanted to experience this wonderful tool with their own hands waited for a while and saw that the witch was still full of interest, so they found ropes and sticks and joined them in drawing circles on the ground. Go in the ranks of the circle.

Not long after, many circles of different sizes appeared on the ground of the Qingque tribe.

After these guys painted, they stood up and admired it, laughing "hehehe" from time to time, obviously very satisfied with their masterpiece.

'These unseen guys. 'Han Cheng cursed in his heart.

'It's just a simple compass, is it so novel and fun? '

As it turns out, simple compasses are such fun.

Not long after the slander, God Son Han also joined the ranks of drawing circles on the ground.

Moreover, his technique of drawing circles with simple compasses is clearly superior to that of Wu, Shitou, and Limp.

The regular pentagonal pattern composed of five semicircular arcs that appeared inside the circle made Wu and the others amazed.

It turns out that in addition to drawing circles, this thing can also draw such complex and beautiful patterns, which is really amazing.

So, with Han Cheng's joining, some people who didn't want to play at first immediately became excited again.

Such a simple and interesting tool was quickly circulated by the Qingque tribe, and it was greatly welcomed by these primitive people who seriously lacked entertainment activities.

Especially those minors, all of them were extremely happy.

So that in the following period of time, large and small circles can be seen everywhere inside and outside the Qingque tribe.

Even the top of the wall and the wall of the kang were not spared, which is extremely crazy.

Wood, wearing a mask, has been clinking with hammers and brazing irons almost non-stop these days.

As small pieces of stone peel off, a mill is gradually formed.

Having learned the lesson of drawing circles last time, Han Cheng did not let the wood come to those places at the bottom of the stone mill where small ditches need to be opened, but instead drew lines of different lengths with small wooden boards and small stones in the other hand. .

Then have the wood chisel along these lines.

Of course, these lines are not rays extending from the center of the circle to the edge of the circle, because after being dug out in this way, the more you go outside the stone mill, the more sparse the grooves are, and the effect of grinding things is not very good, so I just draw became a series of parallel lines.

Drawing parallel lines on a circle is not very easy, of course, except for the drawing method where the diameter is the middlemost line and then arranged on both sides in sequence.

The effect of the stone mill made according to this drawing method is not as good as that of the radial one.

Han Cheng's painting method is to divide the round mill into several parts, and then draw parallel lines in these parts.

The lines between each other are parallel to each other.

In this way, there will be as many grooves on the stone mill as possible, and these grooves are not perpendicular to the edge of the stone mill, which can avoid pouring beans from the grinding eye and running along the grooves before grinding Embarrassing things come out.

It is foreseeable that the smart ancients who invented the stone mill first must not have invented the stone mill like this, but in the process of using it, they constantly discovered the shortcomings of the stone mill, and tried to improve it, and finally it was perfect. Make the stone mill into what it is now.

This is the benefit of the traveler, who can stand on the shoulders of giants to pick the fruits, and directly absorb the wisdom that countless people have continuously perfected and passed down from generation to generation.

Han Cheng is more fortunate than ordinary traversers in that he is no stranger to stone mills, thanks to the fact that he had a mill at home when he was a child.

Turning peas to make jelly and flour noodles is not uncommon.

When Han Cheng drew the line and the wood began to chisel along the line, the rapeseed was ready to be harvested.

Harvesting rapeseed can't wait until the rapeseed is fully ripe, but it can be sickled when it turns yellow.

The reason for being so anxious is because every plant is a good mother, who has a way to let the child leave her arms and live independently.

Dandelion puts a small umbrella on her child, which can be taken away by a gust of wind. Cocklebur puts an armor with thin hooks on her child, so that when animals pass by, she can take them to a distant place.

As for pod-bearing plants such as rapeseed and beans, the method borrowed is sunlight.

When they are fully ripe, it is easy to split the pods and let their young into the bosom of the earth.

Of course, Han Cheng didn't want to let such a thing happen, and let the rapeseed enter the arms of Mother Earth, and their tribe's busy work this year was in vain.

However, compared to the past, this year's rapeseed harvest and subsequent processing are much faster and easier, thanks to the many slaves in the Qingque tribe.