Traversing back to ancient times, Western medicine also farms

Within two days, the summer broadcast was completed.The villagers in Huaishuwan can finally relax and breathe, and the village has returned to its original leisurely life, but the children can no longer stay at Li Mushu's house to play all day like they did during the busy farming season.They were ordered by their parents to eat at home, and to play at Dr. Li's house when they were free, so as not to disturb the lives of Dr. Li and Xiaohui.

The children were disappointed, but their parents also said that when the autumn harvest came, they could still stay at Uncle Mu's house all day like they are now.So the children began to long for the newly planted seedlings to bear rice ears as soon as possible.

Li Mushu was truly free. Whenever he was free, he would think of mahjong bamboo mats.Seeing that the weather is getting hotter and hotter, the sun in July and August is the most vicious. There is no electricity here, Edison has not been born, and the United States has not yet come out. Air conditioning is impossible.Now I can only rely on the cool bamboo mat to sleep well.

Spreading out the paper, Li Mushu took a charcoal pencil and leaned on it to start writing and drawing. Xiao Hui walked over and stood beside him, watching silently, and asked after a while: "Little dad, what are you drawing?"

"It's a bamboo mat. Come here, Xiaohui, and I'll tell you to write, and you'll understand soon." Li Mushu thought of his handwriting. Although his handwriting was good with charcoal, the simplified characters would be called typos and semi-literate.Let Xiaohui write it. Xiaohui's handwriting is beautiful and neat, and it is comfortable to read.And while writing, you can learn how to make this mat.

Li Mushu marked 'one' on the mahjong tiles, and asked Xiaohui to also pick up a brush and lay down a piece of paper beside him to write the note: 'one'.Then Li Mushu started to explain, and Xiaohui started to write.Sometimes Xiaohui would stop writing to ask questions, and Li Mushu would patiently explain to him, and then write down when he understood.

Without Li Mushu and Xiaohui around, Dr. Wang and the others would feel bored sitting in the living room.Xie Wensheng didn't sit for a long time and went into the study to see what Li Mushu and the others were doing. Doctor Wang and Xu Daming followed closely behind. They stood by the desk and watched the interaction between the father and son.

"Xiaohui's handwriting is so beautiful." Xie Wensheng waited for Li Mushu and Xiaohui to stop writing, and then he smiled and picked up Xiaohui's notes as if looking at a famous painting.Turning his head to look at Li Mushu's stick figure, he immediately frowned and criticized mercilessly: "Xiao Mu's drawing is really ugly."

"Ugly is ugly, and useful is fine. It's better than some people who are extravagant and rotten. Hmph!" Li Mushu has long been used to being beaten by them, and he is now mentally strong.

"Brother Xu, do you think you can go up the mountain and cut bamboo to make this kind of bamboo mat?" Li Mushu asked Xu Daming, a free laborer at home, like a flower with a smile.

"Okay. I heard you say that the bamboo mat must be cool on the bed in this hot day. I think it's better to tell Uncle Da. There are many ingenious carpenters in the village. If we work together, it will be faster and better. .” Xu Daming nodded and offered suggestions.

"Da Ming is right. Xiao Mu, tell me what else you have to do at once. It happens that everyone is free now." Dr. Wang stroked his beard, thinking that he would make two at home.

"Then Xiaomu thinks at home, Daming, take these two pieces of paper and go to Brother Da's house and tell him. I want it too, and it's best to bring a piece of capital before I leave." Xie Wensheng also came to join in the fun, and he didn't think about it I'm leaving the day after tomorrow, so it's too late to catch up with work, right?

"Okay." Xu Daming picked up the two blueprints and ran out. Seeing that he had nothing to do, Li Mushu shrugged and pulled Xiao Hui out.

"Hey, Xiaomu, where are you going?" Xie Wensheng asked after chasing after him.

"I'll get a water gun for Xiaohui to play with."

"Daddy, what is a water gun?"

"You'll know when I make it. It just so happened that Erzhu brought a bamboo over here last night. There are no toys here, so let's make one for you to play with." Li Mushu patted Xiaohui's head, since the father and son slept together last night After the incident, Xiaohui got closer to him a lot and was no longer so polite.

"Xiao Mu, I want it too." Xie Wensheng followed behind and heard it, and wanted to get back to basics.

"...Mr. Xie, you're not a child, and you still want toys?" Li Mushu understood Xie Wensheng now, he was familiar with him, and he would be brilliant if given some sunshine.I don't know which unlucky guy will want him or be taken by him in the future?

"Xiao Mumu, I want it, I want it." Xie Wensheng was really naive, and he was despised by Li Mushu and his son and doctor Wang's shadowless feet.

The principle of making water guns is very simple. Li Mushu played with plastic water guns in various colors when he was a child.Squeeze the trigger with your index finger to shoot the water out of the gun.The greater the resistance, the farther the range and the greater the power.

But there is no plastic here yet, and Li Mushu doesn't know how to make glue, so he can only use this principle to make a simple bamboo tube water gun for Xiaohui to play with.Cut out a bamboo tube, drill a small hole in one end of the small bamboo tube, and cut open the other end, took a bamboo branch that was about as thick as the bamboo tube, and wrapped a cloth towel around the end.Li Mushu tried it just enough to block the bamboo tube, and the simple water gun was made.

"Xiaohui, let's try it out..." Li Mushu brought a small bucket of water, sat side by side in the corridor with Xiaohui, and maliciously targeted Xie Wensheng.Let Xiaohui press the small hole at one end of the bamboo tube with his fingers, fill the bamboo tube with water to [-]% full, then stuff the bamboo branch wrapped with a cloth towel, and then hold Xiaohui's hand and raise it up to aim at Xie Wensheng.Li Mushu smiled slightly at Xie Wensheng, and while Xie Wensheng was stunned, he shouted: "Thank you!"

After hearing this, Xiao Hui immediately followed Li Mushu's hand and pushed the bamboo branch forward forcefully. Due to the pressure, the water in the bamboo tube shot to Xie Wensheng's chest with a bang.Xie Wensheng saw the jet of water coming towards him, so he covered his drenched chest with his hand, and pointed at Li Mushu and Xiaohui with his other hand tremblingly: "Xiao Mu, Xiao Hui, how good or bad are you~~~"

Li Mushu, Xiaohui, and Dr. Wang laughed when they saw Xie Wensheng being so funny. Xiaohui looked very happy, he looked like a six-year-old child.Premature or something is simply destroying the seedlings of the motherland.

"Xiaohui, come and play." Li Mushu held back a smile, and gave the water gun to Xiaohui.Xiaohui filled the water gun with water and was about to aim at Xie Wensheng, but Uncle Wen was an elder and his father didn't support his hand, so it was not good to shoot Uncle Wen like this, so he had to aim the water gun at the flower plate in the yard and shoot it out.

"Xiaohui, come on. Let's play it several times." Li Mushu thought that this thing is too simple, and he might get tired of it after a while, so he quickly taught Xiaohui the principle while he was interested.This principle, once learned, can be applied to many levels.Especially technical, even military.

"There are three chairs here, let me arrange them." Li Mushu placed the chairs in the yard, and arranged three chairs from near to far. "Come on, fill the water half full and shoot it at the first chair to see how it works?"

"Okay." Xiaohui obeyed and shot towards the first nearest chair, almost missing.

"You can fill it with water to [-]% full and try."

"Eight full, slowly push it out."

"Eight points are full, generally push it out with force."

"A full eight, aim, and push hard, fast."

Doctor Wang and Xie Wensheng were smiling when they saw Li Mushu teaching Xiaohui how to play with water guns, but in the end they understood Li Mushu teaching Xiaohui how to play in various ways, and couldn't help staring at the water guns in thought.

Li Mushu didn't pay attention to them, he just asked Xiaohui: "Xiaohui, it's time for you to use your brain again. Can you tell me why the shooting range is different?"

"There is a lot of water in the bamboo tube, and the force to push it out is strong, and the shot will go far with one push; on the contrary, if there is less water in it, the shot will not go far when pushed slowly."

"Yes, Xiaohui is really smart! Look, use your fingers to press the small hole to fill it with water, and then use this bamboo stick to plug it in. There will be no air in the bamboo tube, and the water outlet will only be this small hole. If we push hard, all the water pressure will be forced to this small hole, and then the water will be shot out. The greater the water pressure, the farther the shot will be, the greater the power will be; if we push slowly, the shot will not be able to shoot if the resistance is not enough. It's far away. So, the greater the resistance, the farther the range and the greater the power." Li Mushu said while holding a bamboo tube to demonstrate.

After speaking, Li Mushu went to fetch a shower head and filled some water: "Xiaohui, look at this shower head again. If I tip it over, the water pressure will be forced to these small holes, and the water will spill out. We This is used to water flowers and vegetables, and there is no need to apply extra force to force the water out. After all, we are watering vegetables, not shooting vegetables. But if we change to a large bamboo tube and apply pressure to push the water out, then it will Shooting farther, the person being shot will also be very painful. You can find Uncle Wen as a target and ask him if it hurts?"

"Xiao Mu, how can you teach Xiao Hui like this?" Xie Wensheng shouted.But Li Mushu ignored him, and Xiaohui looked at Uncle Wen and didn't say anything.

"Little dad, isn't this the same as the principle that the greater the curvature of a bow, the farther it can be shot?"

"That's right! Xiaohui thinks about it again, these are all pulled or pushed out by human power. But human power is limited after all, and the distance of the shooting range becomes dependent on that person's strength. If we can use Enclosure, spring, and then using this method, wouldn’t it be more powerful?”

"Does the catapult refer to the mechanism when the catapult is launched? What is the spring?" Xiaohui tilted his head and asked seriously. Doctor Wang and Xie Wensheng also looked at Li Mushu.

Li Mushu didn't expect Xiaohui to know about trebuchets, he just wanted to start, and then let Xiaohui check the data and read books to study.He had known for a long time that Xiao Hui had been exposed to military knowledge since he was a member of the General's Mansion after all.

"The spring is like this." Li Mushu drew a few circles in the air with his hands. Seeing that everyone didn't understand, he took a pen and paper and drew them again: "This is more elastic than the bracket, and the range is farther. But you must have the bracket. Human control is not enough.”

"Oh. Daddy, when can you make it for me to see?" Xiaohui looked at Li Mushu with sparkling eyes. Daddy knows a lot and admires him so much!

"Ah? This, this." Li Mushu was overwhelmed by Xiaohui's admiring eyes, but he could only say that he couldn't do it, and burst into tears.

"Don't bother your little dad about this, it can only be made when Uncle Wen goes back to call a blacksmith. Then Uncle Wen will bring it to you to show." Xie Wensheng already knew what to do, although Li Mushu said it in a mess, and it was It's mainly grandstanding, but according to what he said, the catapult can be improved.As for shooting water from a bamboo tube, if you hide arrows and knives in something like a bamboo tube and send them out quickly, it's more like an assassination weapon, not bad!This time I have gained a lot, and I have to study it with the general when I go back.

"Yes, yes, Xiaohui. Let's not play with such dangerous things when we are young. Why don't you think about it, if we use this principle, we can build a rockery and small waterfall in the yard?" Li Mushu wiped his sweat, alas, so do children. You can't be fooled, let's tell a story in the future.

"Daddy, this is easy. As long as we fill the rockery with water and only open a few small holes or a small slit, the water will flow down due to the water pressure."

"Xiaohui, you are so smart. I decided to make mung bean cakes for you to eat." Li Mushu felt that it was inappropriate to say anything more today, so he immediately fled to the kitchen.These are all the goods in my stomach, and they can't stand scrutiny.Whoever said that the ancients were not smart, they knew everything, much better than a modern person like him.Ashamed, ashamed!