However, if the tree has been dead for a long time, many of the fibers in the bark will rot, so it will not be used, so even if it is a dead tree, you must pick the one that has just died.

In addition to the bark, the bark of some trees also contains a lot of high-quality fiber, but digging up the roots is one more job, and Lu gently abandons this option.

In addition, grasses like palms or rushes can also be kneaded with strings, but where to find good trees with leaves and stems and petioles like palms, and plants similar to rushes can not be seen on the tail of this cold winter.

Lu lightly worked while popularizing science to the people around her, when she was rubbing the rope before, she only had the matter of building a house in her mind, and she didn't have much time to say this, so she was in the mood to spread knowledge at this time.

The closest thing to her side is Ershi, and Lu Qingqing also likes to tell Ershi something he knows.

Ershi remembered everything she said, and asked, "Why do you have to die trees?"

"It's okay to live trees, if there aren't enough dead trees, of course it's okay to peel the bark of a living tree, but it's a pity to kill a good tree just to get some bark, so be extra careful when peeling a live tree. ”

It is best not to peel off the bark completely, but to leave one row behind, and not to peel the clumbs.

The cambium layer is the layer between the inner xylem and the outer phloem of the tree, where the stem cells of the tree are located, without which the tree will die.

And the inner bark of the bark that Lu gently asked for is actually the phloem outside the cambium layer.

Lu gently demonstrated to Ershi what a cambium is.

Ershi was shocked: "Such a big tree actually lives on this thin layer?"

"So, if we have nothing to eat and have to eat the bark, we can't move this layer, so that the tree can keep growing bark for us to eat. And the bark of the tree is not eaten raw or boiled directly in a whole piece, but the starch inside is milled out, and the flour milled out of the bark of some trees is sweet, and the noodles made are particularly delicious......"

Lu said softly and sighed, why did she forget to eat tree bark in winter? But also, there were few fresh trees at that time, and even if there were, I didn't know the varieties of those trees, so what if they didn't taste good?

Ershi and the others were shocked by this new way of eating bark, and they were a little incomprehensible, what is "grinding?"

Lu lightly found that he was talking about food again, and hurriedly pulled the topic back: "Anyway, if there is no condition, forget it, if there is another choice, you can't cut down live trees indiscriminately, if anyone encounters anything that needs to use wood, then no matter how many trees will be cut down, I don't want to worry about soil erosion or land desertification in the future, and then tremble to replant trees, people, take a long-term view." ”

Ershi still didn't understand very well, but the young chief must be right, you can't cut down trees indiscriminately.

She remembered it deeply, and the others who heard it also silently wrote it down, so that not cutting down indiscriminately will become one of the rules of the Qinglu tribe in the near future, and the people of the Qinglu tribe will remember these rules wherever they go and abide by them carefully.

Now, the men peel the bark, and Lu gently takes the two women to tear off the phloem, which is composed of long and soft wood fibers, and the tearing off is often one by one. But the rope that Lu Qingqing wants now is to be used for weaving, so it is naturally a little thinner, softer and more exquisite.

She piled up these yellow-white phloems, smashed them with smooth and non-rough stones, smashed the fibers in them and loosened them, and then unfolded them, tearing the much softer fibers into extremely fine bundles, and then the three strands were put together, knotted at one end, fixed in one place, and then held the three fibers in the palm of her hand and rubbed them in one direction.

This rubbing method is also very particular, such as rubbing counterclockwise, not only the whole rope rotates counterclockwise, but each fiber also rotates counterclockwise, so that the rope will be dense enough and will not spread out as soon as you let go.

When it needs to be lengthened, the three fibers are separated and the fibers are added.

The thickness of each fiber should be consistent, so that the staggered rope can be uniform in thickness, uniform in force, and not easy to break.

The whole process is similar to rubbing a straw rope.

It's just that the rope is much thinner than the straw rope, only slightly thicker than a toothpick, and it is round and soft and does not prickle the hand.

Lu lightly cheekily called it a "line".

The thread is wound around the shuttle.

This shuttle is also very simple, take a wooden block, two palms long, one palm wide, the middle is wider, the two ends are narrower, and then the two ends cut out a concave arc, the line is wrapped around this arc, do not worry about coming out.

Lu gently demonstrated that Ershi and Yitu could rub it by themselves, and the work of peeling and beating the phloem was carried out by the two free laborers, Haruka and Gen.

- Although these two people have a lot of grievances, they are also desperate, and they can see clearly that only obedient people can have something to eat, and they are still peaceful and obedient these days, and they have done a lot of work.

Lu lightly ran while pondering the loom.

Naturally, it is impossible to really come out of a loom, and Lu Qingqing herself doesn't particularly understand the structure, it's too complicated, but she understands the principle of weaving, and she has also seen the simplest weaving method.

To put it simply, the thread of weaving is divided into warp and weft, and the warp thread is divided into odd thread and even thread.

When the odd thread is on the top and the even thread is down, the weft thread shuttles through it, and then the odd thread is on the lower even thread on the top, and the weft shuttles again, and so on, and a piece of cloth is woven.

This principle is exactly the same as when weaving baskets, meadows, and doors and windows.

It's just that because there are too many threads involved in weaving, in order to improve efficiency, it is necessary to make the odd thread and even thread into a whole, and to go up together and down together, so that tools are needed.

Lu squatted lightly on the ground, meditating on the wild survival program he saw in his previous life, the episode of weaving cloth in it.

When she had almost thought of it, she grabbed a stone in her right hand and a stick in her left hand, and hammered the stone into the earth.

Lu lightly inserted a total of four wooden sticks on the ground, marked A, B, C, D, to enclose a rectangular area, of which AB and CD are wide, about 60 centimeters, and the other two sides are long, about 1 meter.

Then she folded two wooden sticks of more than sixty centimeters and tied them to the wooden sticks as AB and CD respectively, about twenty centimeters above the ground.

This AB stick and CD stick are used to fix the warp threads.

The warp thread more than one meter long is tied to the AB stick at one end, leaving almost no space between the threads, and then the odd thread with the odd serial number is tied straight to the CD stick, and the even thread with the serial number is tied to another movable DE stick.

The DE stick goes up, and the even line goes above the odd line, and the DE stick goes down, and the even line runs below the odd line.

I'm up and down, I'm up and down, I'm up and down, a piece of cloth brushing lala...... Whoosh ...... Extended Extended ......

Lu gently looked at (imagined) his work with satisfaction, and suddenly realized a problem: how many warp threads do you need?

Q: It is known that the diameter of the existing thin wire is 0.2 cm, and there is a wooden stick with a length of 60 cm.

Lu lightly ...... Soldier.