Hearing Su Baiyi say this, the people who were originally sitting in the back seats all stood up, took three steps and two steps to the experimental table, and looked at the things on the table in amazement.

The one who is most familiar with these things is naturally Qin Youde, after all, he stole the drawings in the Bao family's blacksmith shop.

If that's it!

Qin Youde knew it in his heart, but he still didn't know what this iron guy was for.

"This is an iron bowl?" Wang Shouxin also picked it up and checked it, as if he wanted to figure out the weight of this thing.

"Iron Ball! Not a bowl. ”

Su Baiyi took the iron hemisphere in his hand, and picked up the other one, and after the two were slammed, they turned into a hollow ball, "You can put it together." ”

However, as soon as his hand loosened slightly, the two iron balls that had no stickiness naturally parted and lay on the test bench in a leisurely manner.

"What is this?" Hou Sui picked up the rubber band and looked at it, but he didn't know why.

"If the old man guessed correctly, it should be gum." Qin Youde looked at the yellowish rubber ring and nodded to tell the truth.

"Gum, it's not sticky!" Hou Sui pinched it, and asked Qin Youde suspiciously.

Qin Youde smiled slightly and said, "Although this is a gum, it is not a gum in the general sense. It is said that the sap of a gum tree was originally made into a ball, and after being drained, it became something like a polo, and with a little force, it could bounce up a certain height, soft and tough. ”

"Lord Qin is amazing!"

Su Baiyi gave a thumbs up, really admiring.

Rubber trees were introduced to Europe from the Americas, and from Europe to southern China, and it was only a hundred years, and this Qin Youde really knew rubber.

"It's nothing!" Qin Youde shook his head, as if saying something that had nothing to do with it: "I used to be an official in the south, and I just saw it." But......" His gaze fell on the cylinder: "What is this?" ”

"This one!" Su Baiyi had already thought of a countermeasure: "It's for pumping, of course, it can also pump the air!" ”

For this reason, he also specially asked people to bring a basin of water up, and personally demonstrated it to several bigwigs around him, pumping the water out of the basin, and then continuously discharging it from a back outlet.

Only then did everyone understand the purpose of the pump.

"Does that confirm the strength of the atmosphere?" Yuan Keli looked at it curiously over and over again, one, two, three, four, five, six times, and didn't see the reason for a long time.

"Yes!" Su Baiyi nodded extremely confidently, and waved his hand towards Hou Fangyu: "Chaozong, come here!" ”

When Hou Fangyu came to his side, he put the rubber ring between the two iron hemispheres, and then gently closed the two iron balls, and said, "Chaozong, you pull the iron ball away!" ”

Hou Fangyu didn't know the purpose of the master, so he could do as he said, pulling the handle on the top of the hemisphere with both hands, and with a little force, the two hemispheres with a diameter of about forty centimeters were pulled apart by him with a "bang".

"Alright, well done!" Su Baiyi touched his head, looked at the bigwigs and the audience, and said loudly: "You have all seen it, a little child, you can pull these two halves of the iron ball apart effortlessly." ”

"But if I suck the air out of the middle of this iron ball, will this little kid still be able to pull away?"

With this question, Su Baiyi aligned the two halves of the iron ball again, asked Hou Fangyu to hold it steady with his hands, took out the suction bag by himself and put on a rubber case, aimed at the air outlet of half of the iron balls, and also covered it with a rubber sleeve, and began to pump.

After pumping for about five or six minutes, I felt that the pulling force on the cylinder was getting stronger and stronger, and finally it was difficult to pump the piston, and then I stopped pumping air.

Su Baiyi knew that although this iron ball had not taken away most of the air, there should still be a lot of residual gas.

However, it is not about the big picture.

Tie the mouthpiece tightly with a rope and slowly pull the pump off.

Under the action of atmospheric pressure, the two iron balls naturally merge together.

"Chaozong, you can pull it again and see if you can pull this iron ball away?" Su Baiyi looked at Hou Fangyu with a smile.

"Good!"

Hou Fangyu was eager to try, put the things in his hand on the platform, and then held an iron handle with one hand apart and pulled it hard.

"Hi ......"

However, the iron ball did not move in the slightest.

Hou Fangyu thought that his strength was too little, so he adjusted his posture again, took a deep breath and used all the strength he had to eat.

"Hi...... Hi...... Hi ......"

After several consecutive his, the iron balls did not move at all, and there was no sign of separation.

"Now, why can't they be separated?"

Su Baiyi was about to tell the truth, but Hua Baiyi, who had white hair next to him, came over again, thinking that Su Baiyi's master and apprentice were making boils together to fool everyone, and said with some disbelief: "Is it true, I'll try it!" ”

"It seems that Mr. Hua doesn't believe me, please!"

Hua Bao also went up!

He was tall and had a long arm span, and he stood majestically at the table, as if he could not tell that he was an old man who had passed his armor.

"Hi ......"

He slammed it hard.

However, the imaginary "clang" of the iron ball splitting into two halves did not happen.

The iron ball still didn't move.

"Hehe, Mr. Hua's strength is not good, come on, come on, in this way, Lord Qin, please move over!"

Su Baiyi couldn't help but pull Qin Youde's hand over, and forcibly put his hand on one of the handles: "Come, the two elders can pull together to see if they can pull this iron ball away?" ”

Don't believe me?

Just kidding, Mayor Ma Debao's brass ball was pulled away by thirty-two horses, and Lao Tzu's iron ball was bigger than his brass guy, if you two can pull it away, then you can really go to the Tang Dynasty and Li Yuanba to try it out.

Sure enough, the two did not pull the iron ball away as expected.

Su Baiyi looked at the iron ball on the table with a smile, and then looked at the audience below, "Why can't the iron ball be pulled away?" Because I have extracted the atmosphere from it, there is no atmosphere inside the iron ball, but there is atmosphere outside, and the atmosphere outside squeezes the iron ball, pressing two half-bowls of the same iron ball together, which is the power of the atmosphere. ”

"Makes sense!" Zhou Shipu twisted his beard and nodded.

Yuan Keli also nodded.

Even Yu Hui, who had always had a black face, stretched his brows at this moment, and seemed to understand the key.

"But how big is this atmospheric pressure?" Su Baiyi smiled again: "I think you all want to know, well, the young and strong men in the audience, please come up a hundred." ”

When everyone heard this, they were all interested!

The big guys above are confused one by one!

A hundred?

Does it take a hundred people to pull this iron ball apart?

Everyone, you look at me, I look at you, all with unbelievable expressions.

"Chaozong, let them not run up, you go and choose a hundred strong people to come up."

"Good!"

Hou Fangyu went down, and in five minutes, he brought a hundred strong men to the stage.

There are countless people who came to Vulcan today to watch Su Baiyi's atmospheric test, and the most important thing here is free human resources.

"Okay, a hundred people in two teams!"

While letting Hou Fangyu divide the team, Su Baiyi used a thick hemp rope to firmly tie it to the iron ball that was put together.

At this moment, everyone finally understood why Su Baiyi came over with two thick hemp ropes.

"Okay, one team on the left, one team on the right, tighten the rope, I said start when I start!"

Su Baiyi gave an order, and a hundred people began to tug of war at the same time.

The tug-of-war was intense, and everyone almost used their strength to feed.

But tug-of-war is not the point.

Off the stage, countless ordinary people, their eyes are focused on one place.

That's the iron ball.

According to Su Baiyi's words, it was the iron ball that was pressed together by atmospheric pressure.

A hundred people, exhausted their strength to feed, the iron ball did not even show the slightest sign of separation.

"Hiss......"

Hou Sui could clearly feel that Qin Youde, who was sitting next to him, took a breath of cold air.

"Okay, everyone, stop, even if you pull it out until tomorrow morning, you won't be able to pull this iron ball."

Su Baiyi asked everyone to stop the tug-of-war, he carefully held the iron ball in his hand, raised his hands high, and said to everyone: "Actually, if you want to open these two hemispheres, why do you need a hundred people to pull them, I just need to open this air hole and let the atmosphere enter it." ”

Put the iron ball in his hand a little lower on his waist and hold it, free one hand, and gently pull down the holster on the air port in front of everyone.

With a "poof" sound, the iron ball naturally separated under the action of gravity.

If Su Baiyi just said the principle of atmospheric pressure, many people still don't understand it very well. In this way, you will understand!

Think about it, an iron ball that a hundred strong men can't pull open, as long as you put some atmosphere into it, this iron ball will be washed away by the atmosphere. So the power of the atmosphere, isn't it great?

"Alas......" Hou Sui shook his head: "Compared with Su Baiyi, we have really lived a lifetime in vain, if it weren't for today's Beijing teacher, the old man would have planned to apprentice in person." ”

"You're talking nonsense!" Zhou Shipu teased him.

Catch time by the forelock!

Su Baiyi closed the hemisphere in his hand again, quickly pumped out the atmosphere in it, still smiling, facing everyone: "So, how big is the power of this atmosphere?" How much force does it take to pull the ball apart? Presumably many people want to know, okay, now, let's witness together, how big is this atmospheric power? ”

"Oh......"

The crowd below suddenly became excited.

Su Baiyi looked back at Zhou Shipu and said, "Old Zhou, it's time for you to go out." ”

Zhou Shipu stood up and waved his hand to Zhong Er in the audience, Zhong Er understood, and together with the others, led the horse from the stage to the stage.

People's eyes slowly gathered over, and when they saw the horse led by Zhong Er, they couldn't help but be surprised.

So many horses?

Roughly counting, there are as many as fifty or sixty horses.

Do you need so many horses to open such a small hemisphere?

You know, horses are much more powerful than people.

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