let go of that priestess

At some point, he felt an inexplicable and invisible gap between himself and the one he loved in front of him.

And as his magician level increased, the gap between them also widened.

Perhaps, this is the third reason why he subconsciously does not want to easily become a magician...

In a daze, Ji Cheng suddenly stepped forward and hugged Jiang Hongdou tightly, hoping to eliminate the panic-stricken sense of distance in this way.

Jiang Hongdou was completely unprepared, and was suddenly hugged into her arms. She was stunned for a moment before she realized it.

"You, what are you doing?..."

"You are worried that I will eat cold food, I have to respond to your feelings~"

"Ah? You, you, at least after this kind of thing... Chu Qiong is still here!"

"Uh."

Chu Qiong?

Ji Cheng's face froze when he heard that.

Just now I couldn't help myself and forgot about her.

He let go of Jiang Hongdou and looked back. At this time, Chu Qiong's eyes were wide open, looking at the two of them, and his small mouth opened into an O shape.

Jiang Hongdou's face flushed with embarrassment, and Ji Cheng was also a little embarrassed.

"Ahem, okay, okay, anyway, eat first, eat first..."

......

......

－－－－－－off topic－－－－－

感谢金丝竹233打赏的500点（你这名字我在后台乍一看是这样的——你收到了来自金丝竹233 500起点币打赏。我：？？？23万点的打赏！？仔细一看......好嘛，让人心情大起大落的，调戏人呢。）

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Chapter 290 Human Inheritance Across Time and Space

After dinner, by the Danshui River, next to the first bucket-type water wheeler that was made.

Using the moonlight, Ji Cheng connected the metal frame sent by the processing factory to it.

The two huge copper discs installed above the metal frame began to rotate steadily, cutting the magnetic field lines of the strong magnet.

That is to say, in this primitive world, the first hydroelectric generator has been born.

With burning eyes, Ji Cheng picked up the connected wire again, looked at the bamboo thread on the table in front of him, paused and said:

"God said, let there be light."

"?"

The two girls, Jiang Hongdou and Chu Qiong, were stunned when they heard the words.

Ji Cheng raised his head and smiled: "Isn't there such a sentence in the sacrificial prayers before? That's just right."

His face became more serious, and he divided the wire in his hand into positive and negative poles, touching the two ends of the bamboo wire respectively, and continued:

"It has nothing to do with the gods, what you are about to see is the light of science.

With the power of science, human beings can finally overcome the endless darkness. "

As the words fell, the bamboo silk also happened to appear bright after being heated, reflecting on the faces of the three of them.

The test was successful!

In the darkness, in front of the table surrounded by three people, this light is insignificant, but so conspicuous, like a new star rising from below against the sky.

Jiang Hongdou and Chu Qiong's eyes widened slightly, they glanced at the water wheel and metal racks operating behind them, and then stared at the glowing bamboo threads on the table again.

Looking at the light, Ji Cheng's eyes flickered.

It's been a long time.

This is, across time and space, human inheritance!

......

......

Magnetism generates electricity, and electrical energy is converted into internal energy, and then converted into light energy.

Last night's experiment was only one aspect of electricity utilization, but it was an extremely important aspect.

Ji Cheng, who knows the history of Blue Star, understands that lighting will bring about earth-shaking changes in the way of life and production of the entire human civilization.

Early in the morning, a temporary second-floor residence next to the Council Hall, and an office on the first floor.

After breakfast, Ji Cheng asked Jiang Hongdou to stay for a while, and communicated with her to determine the next development direction of the town after the birth of electricity.

"Let electricity enter thousands of households, and let the light of last night shine into thousands of households. This is a big goal. Before that, we still have a lot to do."

Ji Cheng said: "There is a generator, and there are three ways we can generate electricity now——

Similar to hydroelectric power generation powered by waterwheels last night, or wind power generation by making windmills and using wind power to drive generators.

And steam power generation using steam as power.

What I want to say is that the former two can be used, but the latter must be avoided. "

"Yes, got it."

Jiang Hongdou nodded and said, "The latter is not considered because it is not environmentally friendly, right?"

"Yes." Ji Cheng shrugged: "The purpose of our research and development of electricity is to replace the steam engine.

But then again, even with new energy sources, we cannot completely replace them.

It's just that steam power is not used in aspects such as power generation, and steam engines will still exist. "

"Huh? Why is that?"

"Because before mastering the energy with an absolutely overwhelming advantage, all energy sources actually coexist in multiple forms. It can only be said that a certain energy source dominates, rather than completely replacing it.

For example, many factories generate high-temperature heat when they are in operation. If this heat is used to boil water to generate steam, the steam engine can still be used, and if it is left alone, the energy will only be wasted.

And for civilizations that do not have an absolutely overwhelming advantage in energy, these wastes are not advisable.

Absolutely overwhelming energy means, some kind of almost inexhaustible source of energy.

Since energy is almost inexhaustible, at that time, naturally, there is no need to care about energy waste. "

"Oh." Jiang Hongdou understood, but the meaning of Ji Cheng's words made her a little bit speechless:

"Nearly inexhaustible...Humans can master this technology?"

"can."

Ji Cheng nodded seriously: "For example, controllable nuclear fusion, I come from such an era."

"This, so... then us?"

"We don't have to think about it. We have no hope of reproducing this technology in this life, and we don't know how long it will take."

Ji Cheng smiled wryly: "This kind of technology gap is really too big, and the extensive use of controllable nuclear fusion is already one of the most cutting-edge technologies in my area, so I don't know how to do it either.

The knowledge that the time machine pilot needs to reserve does not include these, so it cannot be passed down here at all. "

"Well, it's too greedy to expect this extravagantly..."

Jiang Hongdou calmed down quickly: "In short, our civilization will control energy waste for a long time to come.

Our current factories also have room for improvement, which can make energy utilization more efficient. "

"Well, yes, but optimization and improvement are all things to consider in the future. Right now, the main focus is on electricity."

Ji Cheng pulled back the topic and said: "Now we have generators and the direction of power generation has been set, but we don't have a place to store electricity for later use."

"Huh? Store electricity?"

Jiang Hongdou was stunned:

"You mean, can something invisible and intangible exist in something like magic essence?"

"OK."

Ji Cheng nodded, paused, and said, "However, the magic element stored in something, and the electricity stored in something seem to be the same, but the essence is actually different.

The storage of magic essence is to put the magic essence itself into the storage ball, and the magic essence itself has not changed.

The thing that stores electricity, to be precise, is actually an energy conversion device, and what is stored is no longer electricity.

For example, the flywheel that has been used now, in addition to stabilizing the output power, this thing is actually an energy conversion storage device——

It takes a lot of effort to turn a heavy wheel, and it takes a lot of effort to stop it from turning.

We first generate electricity, use electricity to turn the wheels, and then use the turned wheels to drive the generator to generate electricity when needed in the future.

In this way, is electricity stored in a non-electric form? "

"So that's how it is!" Jiang Hongdou's eyes lit up, and Ji Cheng explained it very clearly. After she understood it, her mind opened up, and she also thought of some other problems.

"When the flywheel rotates until it needs to be used in the future, the energy will be lost.

And the longer the time, the greater the loss, because the spinning wheel will eventually stop slowly by itself. "

"Yes, this loss is inevitable."

As Ji Cheng spoke, he took out a small magic element storage ball that he carried with him, and nunuzui signaled:

"In comparison, the magic energy is even more special, as long as the magic energy is stored, it will not be lost.

In other words, with my level of precise perception of magic essence, I have never noticed any loss of it.

How much is deposited, and how much is taken out. "

"Well, it would be great if the energy could be transformed into magic element." Jiang Hongdou sighed.

Ji Cheng shook his head: "It's a pity that we have only discovered that magic essence can be converted into other energies through magic, and we haven't found a way to convert other energies into magic essence."

"Well... I don't want to think about it, anyway, let's store energy in our way now."

Jiang Hongdou squeezed her small fist: "Next, make a lot of flywheel energy storage!"

"Uh, no no, wait a minute."

Hearing this, Ji Cheng interrupted with a smile: "We are not doing flywheel energy storage stations now.

Before the flywheel has no technical conditions to build an underground vacuum tank and eliminate most of the external interference, the energy loss is still too large.

We have a better option - to build pumped hydropower stations. "

"Pumped hydropower station?"

"Well, isn't there a big difference in terrain at Nanya Waterfall?"

Ji Cheng said: "Just imagine, if the water that falls from above is sent back to a high place with electricity, and placed in an artificial pool, when needed, the gate is opened to release the water, and the water falls again, driving the waterwheel, and the waterwheel drives the generator. Power generation, can it also store electricity?"

"Oh!"

Jiang Hongdou has been amazed for the first time today: "There are other methods, this sounds good, and the energy loss is very small.

That is, the water transported back evaporates, resulting in a decrease in the total amount of falling water, which will cause a large loss. "

"Well, some sunshade protection can be done in this regard, and the technology is much simpler in comparison.

And, I have to remind you that although the water will evaporate, it will rain in the sky~"

"!"

Jiang Hongdou was startled when he heard the words, and then his eyes sparkled again:

"Awesome! The wisdom of human beings and the accumulated inheritance are really amazing!"

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