After speaking, Master Shao Yuanqin took another instrument from the hand of the Zumo disciple.

The roller is a device used to draw water from the well using the principle of the wheel axle, the instrument is a four-corner bracket to support a section of log, a hemp rope is fixed on the log, and the other end of the log is a Z-shaped rocker, the power of the wheel axle is used to shake the rocker, so that the hemp rope is rolled up, so as to lift the bucket in the well.

Next up is the demo.

Miss Wan unconsciously squeezed into the crowd to see how the device was used.

Master Shao Yuan ordered the disciples to tie a boulder to the other end of the rope, and encouraged the students to try to pull the rope to see if they could drag the boulder.

"I'll ——"

After the last round of attempts, one student quickly volunteered to try.

"Hey-hey-hey-"

This student's physique can be regarded as strong, but with his physique, it is still a bit laborious to drag a boulder, and with a lot of effort, he only drags the boulder a meter away.

"It's too strenuous, it's hard to drag it alone!"

The student who laid down the rope grumbled breathlessly.

"Is there anyone else who wants to try it?"

Master Shao Yuan looked at the middle school student and asked.

"No...... Not ......"

Seeing that the sturdy student only dragged the boulder one step away, all the students shook their heads after weighing themselves.

"Then please ask this student to use this instrument to pull and see!"

After speaking, Master Shao Yuan told the student how to use the wheel.

So, according to the method described by Master Shao Yuanqin, the student turned the rocker of the roller, the roller turned, rolled up the rope, and easily dragged the boulder forward.

"Huh, it's a lot easier!"

The student who turned the wheel said with surprise in his eyes as he saw the boulder, which was very laborious when he dragged it at the beginning, continue to move forward.

"Really, I want to try it too!"

Seeing that the machine was working, another student also raised his hand and said forward.

"Yes!"

After two attempts at different dragging, the student also let out a sigh of surprise.

"This device is truly amazing!"

"If this boulder is a bucket hanging from a well, it can also be easily lifted to the ground, so that people don't have to complain about the hard work of fetching water!" Shao Yuanqin further explained.

"Wow, it turns out that he used it to fetch water, can it really be done so easily?"

After everyone heard Shao Yuanqin's story, they suddenly realized.

"With this instrument, the work of drawing water from the well in the future is no longer the preserve of men, and even women who are powerless can easily draw water from the well. Master Shao Yuan smiled confidently at the students.

"Wow! this device is so practical!"

"It would be great if everyone could have such a device!"

After hearing this, everyone sighed.

"This idea is not impossible, we Momen, today we want to tell you about the construction method and principle of these instruments, and everyone can make the same instrument in the future!"

"Really!"

"It's not a joke!"

"Momen's instrument manufacturing is not a secret inside the door, will you really tell him to everyone?"

As soon as Shao Yuanmo's words came out, the students in the courtyard began to talk about it as if they had exploded.

"Our Mo family emphasizes benefiting the people! Since I Shao said it today, of course I will fulfill my promise! As long as you listen carefully, everyone can make such a device!" Shao Yuanmo raised his hand and said heroically to everyone.

"Good ——"

"For the people!"

"For the people!"

"For the people!"

Shao Yuan's few words instantly mobilized the students' enthusiasm for learning.

"At last night's debate, I saw that Shao Yuanmo always cherished words, and I also said that Shao Yuanmo was not good at speaking, but I didn't expect to see Shao Yuanmo's wonderful speech today, which is really impressive!" Miss Wan sighed in a low voice after seeing all the students enthusiastic.

After the enthusiasm of the students was successfully mobilized, Master Shao Yuan drew the principle structure diagram of various instruments on the blackboard with powder on the apricot altar of the college, and explained it to the students with great patience.

After an hour of explanation, Shao Yuanmo finally finished explaining the principles of several instruments.

After listening to Master Shaoyuan's explanation, all the students nodded in realization.

"Momen really deserves to be a chivalrous man! Wan'er is conceited and erudite, and when she heard Mr. Shao's explanation today, she is really ashamed of herself!" After listening to the narration, Miss Wan smiled at Ye Xianglun beside her.

"Miss Wan and Master Shao Yuan have their own strengths, why should Miss Wan be modest!"

After the explanation of the principle of the instrument, the sun was approaching mid-heaven, and after Shao Yuanqin Master looked at the bright sun at his head, he said again:

"My giant recently discovered an interesting phenomenon, and the giant named it "Small hole imaging!" I see that the daylight is just right today, if you are interested, you can witness this miraculous discovery with me!"

"Good ——"

With the magical narration above, everyone is naturally very willing to see what rare things Shao Yuanmo can come up with.

Seeing that all the students were responding, Shao Yuanqin Master signaled the students to prepare props.

After Master Shao Yuanqin's order was issued, the disciplined Zumo disciple quickly prepared the props.

The props required for the imaging of the small hole are not complicated, you need a black cardboard with small holes, build a dark room after the cardboard, use a white paper to set off the dark room, and the final prop is the ink portrait used for imaging.

This ink portrait is made of white translucent rice paper, the portrait is a simple human-shaped pattern drawn in coarse ink, the painting is fixed by the wooden frame, and the two foot inkers hold the wooden frame upside down after the painting, and hold it high in the sun, and the equipment for small hole imaging is complete.

"Huh, why is this portrait being held upside down?"

"It can't be that the two of them are taking it the other way around, right?"

Seeing the upside-down portraits of the two foot inks, everyone was puzzled and discussed, and even Miss Wan beside Ye Xianglun was puzzled: "Shao Yuanmo is going to be Xuanxuan?"

In the crowd present, except for a group of ink artists, only Ye Xianglun smiled and said nothing.

"Everyone is not mistaken, this portrait is to be taken upside down!" Seeing everyone's doubts, the young man said mysteriously.

"Nowadays, the sun is shining, and the scorching sun shines on the rice paper, and because of the opaque nature of black ink, it will form a portrait on the ground. ”

When Shao Yuanmo said this, all the students unconsciously began to discuss:

"Everyone knows this phenomenon, so why use a giant to find out!"

"That's it, I can still use gestures to conjure up the shadows of different animals!"

“......”

After everyone stopped talking for a while, Shao Yuanqin Master spoke up again:

"Everyone is aware of the phenomenon of daylight projection, but do you know what will happen in the dark room behind this plank?"

"Of course you know, isn't it also an upside-down portrait?"

"Then, today I'll show you something different!"