Release that Witch

According to the construction plan, Roland arranged a equipment room at each well point to accommodate all the equipment needed for the three links for management.

The complete equipment consists of a steam engine, an electric motor, a power supply, a boiler and two storage tanks. Adding a water tower outside the room constitutes the entire three-way system.

The steam engine is responsible for pumping the well water into the water tower and the storage tank. The former mainly supplies domestic water to the house, and the latter is the heating water prepared for the boiler. The first-class reservoir is higher than the ground, and there are limestone and washing stones suspended in the tank for precipitating magnesium and calcium ions in the water to play the role of soft water. The clarified water will be introduced into a lower-level secondary storage tank, and the floating material in the water will be stopped by a special filter made by Soroya.

The water supply of the boiler is completed by the electric motor. When the internal water level is too low, the float valve will be driven to open the motor to deliver water until the water level returns to normal. This process is much more stable than manual addition or steam engine delivery, and it is also free of need. The trouble of standing next to the person.

Since both the water supply and the heating have been pre-examined, the construction will naturally not have any difficulties. The key is the power supply system, which is the first time for the town. Whether it is Karl or other members of the stonemason, it is definitely not clear about electricity, so Roland intends to make a small model in the courtyard first, and then explain it to the Ministry of Construction after success. After all, he does not know much about this, the circuit Knowledge basically stays at the high school level.

With a reliable and stable power supply, the first step should be to create a qualified electrical device, that is, a light bulb.

Thinking of this, Roland put on a thick coat and set off for the backyard of the North Hill.

Under the mist of the nightingale, it took a quarter of an hour to reach the destination in just three or four minutes.

Pushing open the wooden door, Anna and Lucia immediately noticed him, but the former was busy with his hands and only nodded at him. The latter ran over cheerfully. "His Highness, good morning."

"Good morning," Roland nodded with a smile, then walked over to Anna. "Where are you busy?"

“The new barrel and locking mechanism,” she pointed carefully to the several long steel tubes on the table. “Your drawings are somewhat unreasonable. I think it would be better to change this.”

Suddenly my Na, Roland couldn't help but reach out and tried to touch the other's head, but was shaken back and forth and refused. Hey... This scene seems to have been seen there. He coughed twice and converged to tease." Well, do it according to your ideas."

Roland doesn't mind her questioning her own design. Her own firearms drawings are self-inferred according to the principle. It is normal to have flaws and room for improvement. Moreover, Anna's own learning talents and comprehension skills far exceed themselves. He thinks One day, her understanding of her knowledge will reach a level that she can't reach.

After a while, Anna put down the parts she had made and walked over to Roland, bowing her head slightly.

Uh... Roland can't help but see, is this going to make up the previous touch?

He tried to lick her soft hair, and Anna looked up with satisfaction. "Do you have something new to try?"

"Ah...no," the prince looked at Lucia. "How are you doing the separation of the messy ore in the mine?"

"Basically completed, the results are here," the latter handed a stack of books to him. "But the test of mixing with steel may take a long time, because there are too many elemental elements to be separated."

“It’s already very good to be able to do this,” Roland encouraged with praise.

This is also an extension of the material improvement program. Compared to the previous control of carbon content and the elimination of impurities to obtain high-quality steel, the elements involved have now expanded to the resources available in the entire North Slope mine. There isn't a lot of cleverness in this part of the content, only a little bit to add to try.

Roland spread the book and looked at the characteristics of various unknown minerals in the yard, and soon found the element with the highest melting point. He pointed to the column labeled Test No. 12. "Where is this ore?"

Lucia immediately found the test samples - they were packaged in transparent coated bags, a rough stone and a packet of decomposed elemental particles.

And that dark stone, Roland felt like he had seen it.

Wait, isn't it the same as the black stone that was sent to your office before? Since I handed it over to the alchemist, I also left it behind and never noticed it.

As a result, it is actually the mineral with the highest melting point in the northern slopes?

In the record book, Anna can't accurately mark the specific value of the melting point, so it can only be described by language. It is between ordinary, high and high, but its characteristic column is extremely high. .

As for the elemental particles, it is silvery white like most metal elements, and there is no difference.

Is this stuff tungsten?

But let it be, as long as it is difficult to melt.

Roland asked Anna to process it into a very thin wire, twisted into a spiral, fixed on a glass frame, and then put the shelf into the glass bubble, the main part of the lamp is completed.

Of course, if you want to make it stable, there are two steps that need to be done – and this is the most difficult part of the bulb process: one is vacuuming, the oxygen is isolated from the filament; the second is sealing, ensuring that the air is not Will break into the bulb.

There is no doubt that these two steps can only be done by witches.

Roland first found Ai Gesha.

The vacuum is mainly caused by the fact that the filament becomes extremely active at high temperatures, and it is easy to generate an oxidation reaction to form a new oxide, and the result is melting. To achieve this effect, it is equally effective or even better to fill in unreacted gases.

Pure nitrogen is an excellent filler.

Using the principle that nitrogen is lighter than air, a simple down-drain method makes it easy to fill the bulb with nitrogen, which is much simpler than the vacuuming step. When the other end is also nitrogen, it is sealed by Soroya, and a simple incandescent lamp is done.

Looking at the slap-sized electric light in his hand, Roland felt so much in his heart that such a thing that had been eliminated in later generations represented the highest level of production in the town.

The next night, he summoned all members of the town hall to the vestibule of the castle, and ordered the guards to extinguish the torches in the yard.

In the snowy night when the twilight covered everything, Roland closed the circuit switch.

In an instant, the center of the garden lit up a group of orange-yellow light. It was not swayed and extinguished in the cold wind like a candle, nor was it as bright as a bonfire. The range of illumination is not large, only a few meters, but the steady light that stands in the wind is a scene that people have never seen before.

No instructions are required at this time.

Everyone’s unrequited look and quiet scene tells the story.

He brought electricity to the world.