When the autumn colors were thick in Misty Village, in the classroom of the Fog City Engineering Academy, a machine that had never appeared in this world was assembled by Donner little by little. Pen & Fun & Pavilion www.biquge.info

This brain-optimized, meticulously polished machine by skilled dwarf craftsmen for each part, when all assembled, is less than a meter long, wide and high - much more delicate and reasonable than the prototype on Earth.

As the machine became more and more complete, the four hundred students in the class, including Lucia, all looked at Donner's hands with bated breath.

After locking the last thread, Donner took the towel next to the machine, wiped the remaining animal fat on his hands, and said:

"This machine is just a test subject, and it has no practical use......

There were sporadic voices in the classroom, probably not understanding why Master Vane would put so much effort into building a machine that was of little practical use.

Donner didn't answer the question, instead spreading a blacked-out Level 1 Flame Circle into the cavity at the bottom of the machine, and activating the circle.

The boiler above the boiler is heated to the boiling point, and the steam heated to the boiling point is heated again by the flame in a curved duct to reach an extremely high temperature, and then passes through three chambers in turn, pushing several pistons connected to the same camshaft to make a regular vibration sound.

That's right, this is a standard triple-expansion steam engine, which is much more efficient than the one invented by Watt.

But while everyone in the class watched the fan blades driven by one end of the camshaft turn rapidly, Donner just smiled wryly and shook his head.

After a while, the class fell silent, and as Donner had expected, the machine didn't make as much of a stir as its companion on Earth.

He opened the cabin at the bottom of the steam engine and reached in with his bare hands to extinguish the circle, and the crowd let out exclamations again, this time not from the shock of the machinery, but with fear for his hands. As a seventh-level fire mage, of course, Donner would not be injured by a mere first-level flame array.

He smiled and waved his hand, making an innocent expression, and then waited for the steam engine to slowly stop before asking, "Does anyone know why I said this machine is useless?"

Elemanda stood up and replied, "Teacher, because this machine needs to use magic crystals, magic crystals are too precious. ”

"You're half right. Donner smiled and nodded.

"Teacher," Arymia stood up, "because, because this machine is too wasteful of firewood if it doesn't use magic crystals...... There wasn't that much firewood to work with. ”

"Very well, you can see that just burning can drive this steam engine," Donner nodded, "You're right, it's too wasteful to burn firewood, and there won't be that much wood to burn." ”

He motioned for Arimia to sit down, and then asked, "There's a deeper reason, can someone tell me?" ”

At this time, Lucia slowly stood up and said tentatively: "I think it is better to have a whirlwind ......circle than to drive the fan blades to rotate rather than spend so much effort to pass through this machine."

Donner looked at Lucia approvingly, nodded vigorously, and said, "That's right, the most important reason is precisely this! The effect of a first-level flame circle you just saw, but the first-level whirlwind circle directly driving the fan blades will be much faster than it!"

In fact, Donner's attempt to build this steam engine was a pointless, even stupid attempt—it was only that Natia had too many dwarf craftsmen at his disposal, so he spent more than 100 craftsmen two months building the machine in addition to the initial construction of the factory.

The magic crystal circle is a product of a super civilization, and through different magic circles, it can even convert magic energy into matter, not to mention various forms of energy and movement.

Even if you don't know the Occam's razor principle of "don't add entities if you don't have to", just think about it with your toes, and you can know that turning magic energy into heat and then driving a steam engine is as ridiculous as asking an intelligent robot to fiddle with an abacus.

Moreover, after more than a year of channeling through the Far North and the Holy See, Downer has been able to determine that there is no coal, no oil, and no mineral materials that can be used as fuel.

This steam engine did not cause much of a stir in front of these students, and this is also the reason - as the natives of this world, they have long been accustomed to the lack of fuel here, and do not think that the combustion of the machine will cause any revolution.

"Okay, that's all for today's class, interested students can take this machine apart and take a look, just remember to install it......" Donner said as he walked out of the classroom and into the desperate laboratory next to him.

In addition to a simple generator, capacitors made of metal sheets and insulation, and a crude mechanical multimeter, a piece of paper was pasted on the wall with a newly coined Western word written in ink: energy!

Yes, in addition to the enemies around him, Downer has always faced an even greater challenge – where the energy will come from.

The clockwork materials that have been continuously refined by the dwarves are still being shipped to Fog City, and it won't be long before these materials can be made into the first batch of mass-produced clockwork components, driving the development of the entire three northern provinces.

But what next?

Clockwork batteries (again, clockwork batteries have nothing to do with electricity, they store mechanical energy) were enough to lead the first industrial revolution, but it alone was impossible for the planet's civilization to develop to the stars.

However, the steam engine is meaningless without suitable fuels - a wood-burning industrial revolution cannot be expected.

It is also impossible to establish an electric civilization - it took twenty kilograms of desperate gold to get the power of the Far North country, and even if the entire Cathedral of Light was demolished (guarded by elite guards, Donner would not dare to demolish it at all), there would be no way to isolate the radiation of the magic element on a large scale.

Magic Scarbs are non-renewable resources that are close to depletion.

- Now it is certain that neither the doctor nor Jingwei has ever thought of returning to Earth with these magic crystals, and the so-called magic crystal collection plan is just a pretense. But taking out all the magic crystals accumulated by the Jingwei is not enough for hundreds of millions of people. And without the participation of hundreds of millions or even more people, relying on the three northern provinces alone and relying on the Huls Continent, tens of thousands of years will not be able to reach the height of the civilization of the Bright God or the civilization of the factory owner.

It seemed like all the doors were closed, but Donner knew that there was another channel that he hadn't tried. Perhaps, that was the only solution in front of him.

That's magic!

No, it's not the magician who casts it, it's the almost omnipresent radiation of the magical element that hides behind it in the extra four dimensions.

Since it can be transformed into matter from the form of energy, it must contain unimaginably huge energy.

It can even be understood as a wireless power transmission network created by a super civilization.

However, what it transmits is not electricity, but some unknown form of energy radiation.

However, to harness this super-energy, it will take a huge leap forward in both basic science and applied technology.

Donner has said many times that it is impossible to learn the secrets of magic by studying models of magic. Now, having set up this desperate laboratory, he has a vision.

Perhaps in a laboratory environment, through the electromagnetic methods he knows, he can control certain metals to detect extra dimensions, learn about the skin of some magical element radiation, and then try to use it - it will always be much easier to "steal electricity" than to build this "wireless power network".

But how long will it take? decades, centuries, or thousands of years?

Donner wasn't sure, he had no choice but to bury his head in it. (To be continued.) )