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"Vinegar has a lower boiling point than oil, so it only needs a little heat to boil."

Song Qingyuan said, stretched out his hand, and pointed to the oil pot.

"So when you put vinegar under the oil pan, it's the vinegar that actually boils, not the oil."

When everyone heard this, they suddenly realized that the truth was like this.

The scholar who asked the question immediately bowed, bent down respectfully, and saluted, "The student understands, Xie Song Nongnu solves the doubts." ”

"This son is polite!"

Song Qingyuan bowed slightly, his eyebrows moved, and he laughed softly, "If the son is interested, he is willing to come up and give it a try." ”

In modern times, they don't just learn from books.

The teacher will also occasionally take everyone to do experiments and give experimental lessons.

Only in this way can we understand the knowledge more thoroughly, more clearly, and even memorably.

So, what Song Qingyuan has to do now is to encourage this student to have the courage to go on stage and give it a try.

"This ......" students were a little nervous.

Let him be in front of all his classmates and officials from all walks of life.

When he stepped forward to try it out, he still had some ...... Can't let it go!

I just wanted to refuse, but when I looked up, I was greeted by a pair of gentle and encouraging eyes.

There is strength, calmness, self-confidence, calmness, and calmness.

Looking at each other, the student suddenly smiled.

A little woman dared to talk in front of all the men.

He is a son, so why should he be afraid.

Dashing flicked his sleeves and arched his hand, "I don't dare to ask for it." ”

After that, the students walked on the high platform generously.

Put vinegar in the newly prepared pot, pour oil on it, light it, and after churning in the pot, you stretch out your hand......

But the hand clenched tightly, stopped in mid-air, and never fell.

It turned out that when it came to the end, even though he knew that nothing would happen, he was still nervous and scared.

"It's okay, you can ......"

Just when he was entangled, a soft voice, like a pool of spring water, trickled into his ears.

"The third brother has already done it, and you must be able to do it too."

"Yes!"

The scholar raised his head suddenly, if others can do it, he will definitely be able to do it.

Thinking so, the scholar regained his courage, gritted his teeth, closed his eyes, and put his hand into the oil pot.

"It's fine!"

The student opened his eyes in surprise, as if he had completed a major mission, and breathed a sigh of relief.

It's in

At this moment, there was a round of applause.

It is for Song Qingyuan, and it is also for this student who has the courage to try.

The student's face flushed and he lowered his head unnaturally.

"Xie, Xie Nong's ......"

After saying that, he ran away and returned to the students and prisoners.

Secretly raised his eyes and looked at Song Qingyuan, but his face became more and more red.

saw Song Qingyuan smile slightly, and raised his voice, "Tianxingjian, a gentleman strives for self-improvement." ”

"The terrain is good, and the gentleman carries things with virtue."

"Lao Ji is in the woods, and his ambitions are thousands of miles."

"In the twilight years of the martyrs, their hearts are strong."

"Only by constantly trying, constantly thinking, and constantly exploring, people will make progress."

"I would like to encourage you with all of you."

"Next, let's talk about phosphorus ......"

"The ignition point of phosphorus is very low, and people often say that ghost fires are because of phosphorus."

As soon as Song Qingyuan's voice fell, San Lang and the others understood, and immediately put the prepared things on the podium.

It was a shabby piece of cloth sprinkled with phosphorus.

Da Lang took out the convex lens polished with glass, placed it on top, and focused the light.

In a few moments, the rags were on fire in full view of everyone.

"Ghost Fire! It's definitely a ghost fire! ”

The students below exploded.

At this time, although the sun was shining, the fire was not very obvious.

However, if it is put into the evening, it is exactly the same as the ghost fire that people often see, which suddenly ignites.

"A liar is so cunning that he could come up with such an idea."

The students couldn't help but be indignant.

At this time, they all understood that those Taoist priests, the ghost hunting and ghost burning in the mouth of the fairy girl, were the phosphorus that was causing the blame.

"Song Nongnu, what is that, it is so magical?"

A person's sharp eyes suddenly stared at the convex lens that Da Lang had placed.

"It's a convex lens."

Song Qingyuan picked it up and held it in front of him.

While showing it to everyone, he said, "This is just a lens that I polished with glass, and the principle is to focus light." ”

"This convex lens, everyone can do it, regardless of the glass, even if you take ice cubes, you can ...... it"

Song Qingyuan suddenly thought of something, and said with a smile, "It's summer now." ”

"When it is winter, you might as well polish a piece to see if you can light the firewood at home."

"Why wait until winter."

As soon as Song Qingyuan's voice fell, someone shouted, "Wait for us to rest."

When you are bathing, you will take the ice cubes and polish them, and you will know if you try it. ”

"Uh......"

Song Qingyuan was stunned and quickly reacted.

Take ice in winter, it's common sense.

But she forgot that the prisoners in the Guozi Prison were all the sons of eunuchs, and their families were wealthy, so how could they be confined to winter and summer.

If you want, you can buy it at the ice shop at any time.

Once, she also dedicated herself to Lord Xiao with the method of making ice.

Now, the ice shop is located in a prosperous area of the capital, and it is said that business is booming.

"If you have the conditions, you can try it......"

Song Qingyuan said, and talked about the next one for everyone.

The crowd listened with relish.

These things, which they have never been exposed to, are like opening a new door for them.

Let them unconsciously want to explore, want to dig deeper.

Until two hours later.

Song Qingyuan's mouth was dry, and he finally finished explaining those deceptions.

Actually, these are some very basic, physical and chemical knowledge.

It's just that the people of this era, without this concept, are still in a hazy haze.

What Song Qingyuan has to do is to guide the direction and open the window of knowledge for them.

Perhaps in the near future, physics, chemistry and other knowledge will be truly applied to ancient construction by these talents.

"At this point, all the records recorded in the "Deception Revealed Record" have been explained."

"Then ......" Song Qingyuan's gaze swept over everyone.

"I want to ask you, what is deception and where does it come from?"

"It's greed!"

Someone replied loudly, "If you don't have greed, if you don't have **, you won't cheat." ”

"Yes!" Song Qingyuan nodded.

"Scammers choose to cheat because they are greedy."

"What is the reason for the fool?"

"It's also selfish desires!"

"Just as, some people want to be prosperous, and some people want to have a lot of money."

"Some people want to get rid of fear, some people want to get rid of disease."

"Scammers take advantage of people's psychological weaknesses to succeed repeatedly."

Speaking of this, Song Qingyuan's words changed.

"In the "Deception Secrets", a lot of deception is recorded."

"But there are countless other tricks that we don't know about, and they haven't been recorded."

"So, how can we really prevent fraud...... "Splendid Pastoral: Farm Small Landlord."

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