It's a day off, so Rafa can ask Lilith to do extra work, and Lilith is very reluctant, but when she hears that the job is very simple, and she can get a fruitcake from other cities, she immediately accepts.

Measuring a large chunk of freshly minted copper with a newly made standard caliper, Lilith pushed her glasses, "Isn't it copper wire? ”

For three months, she had no time to rest except for her days off, and although she was very tired every day, it also allowed her to use her magic very purely, and her magic power increased greatly, sometimes cutting some simple parts, and she could even work while eating.

She sat on the table, picked up a cake full of fruit slices, and ate happily, just from time to time to glance at the copper pieces that were shedding crumbs, she had already thought about it, imagining a bundle of wrapped copper wires in the copper blocks, and peeling off the excess parts around the bundle of copper wires, and the rest was the copper wire itself, which was a bit like carving.

Rafa also considered whether to build a copper wire factory, but if you think about it, everything about electricity is now in the trial stage, and it is too early to talk about universal access to electricity.

Lilith was making copper wire, and he himself was not idle, and after handing over the drawings of the glass bulb to Felihill, he himself began to drag Heddah to participate in the production of the hydro turbine himself, and they only needed to make a simple small hydro generator, not even an ammeter and voltmeter.

He had already had Lilith cut the blades of the turbine, and now it was up to Heddah to weld them to the turbine body.

Hedda welded so fast that with the movement of her fingers, the blades were firmly welded to the wheels of a waterwheel, and Rafa followed suit, wrapping the copper wire that Lilith had made first around several magnets and installing them into the turbine.

At first glance, this may seem rudimentary, but it does generate electricity using electromagnetic induction.

The next most important thing is the production of filament, the best material for the bulb is tungsten filament, tungsten is not a rare thing, but he can't find tungsten for the time being, he estimates that this thing should be there, but no one can distinguish them.

Although he could use carbon or bamboo wire instead, and the effect might be good, he still wanted to use the longest-lived tungsten wire, because he didn't want the light bulb to break when Phililiscil looked at the book.

The search for filament had saved him too much work before, but after several days of searching, he had finished all the work he had arranged for the rest of the people to do, and he still couldn't find tungsten.

It wasn't until three days later, when he gloomily returned to his backyard to replace tungsten wire with the rest of the substitutes, that he saw a pile of swarthy metal in the courtyard where Heddah often worked, and he asked Hedda what it was, and the latter told him that it was not iron anyway, but slag from iron ore.

Rafa had an idea, and called Lilith to cut a swarthy "slag" into several extremely fine threads that resembled embroidery needles.

Installing the filament in a transparent light bulb with a little nitrogen injected with drainage, he found lightning.

"What does Your Highness mean...... You want me to electricity this thing?"

Lightning held the strange transparent ball in her hand, she knew that this thing was something that Rafa had been busy with for the past few days, and it should be a useful thing.

"Yes, your sister Fei Li's beautiful eyes depend on it to protect her. ”

"What does it have to do with me?" Philicille frowned slightly.

"This thing allows you to read clearly at night. ”

"Well, thanks. ”

Felihill didn't want to dampen his care, because she could read and write even in a room without light.

The lightning bolt pressed both hands on the two protruding points at the bottom of the bulb as Rafa instructed, and then slowly raised the current from low to high.

At first, the bulb did not react, until the energy she released became higher and higher, and the filament in the middle of the bulb turned red, like a red-hot wire, and I don't know when it will be burned.

She glanced at Rafa and asked if she wanted to continue, and after receiving an affirmative answer, the magic she let out grew stronger and stronger, but strangely enough, she had expected the tiny filament to burn immediately, but now it showed no signs of melting except that it was getting brighter and brighter.

Rafa smiled slightly, knowing that he had found the right material.

The light bulb grew brighter and brighter, and Lightning felt that what she was holding was not a glass, but a ball of light, and the light was so strong that she couldn't open her eyes.

"Is this what you mean by illuminating the night?" Philicille couldn't help but reach out and touch the surface of the bulb, which wasn't as hot as a torch, and the brightness and range of the light were much better than a torch, "but we can't let the lightning keep it going, can we?"

"Of course. ”

Then he called for Lucy, lightened the weight of the turbine, and then carried it alone, and asked Audrey to follow behind with a large circle of copper wires that had been coated with a layer of white insulator by Coria, and brought some tools, and finally did not forget to call Vena and Lucy, and then hurried out of the city.

As soon as Rafa left the city, he ran towards the inlet of the upper reaches of Lake Shinai, where there was a wooden bridge made of vines by Cole, and he placed the turbine at the water's edge, which was the upper reaches of the Shirri River, but it had now been cut off by Shinai and became the inlet of Lake Shinai.

Let Lucy restore the turbine to its original weight, let Vena build two platforms that can support the turbine out of dirt, and then put the waterwheel-like turbine on it, the water flow immediately drove the fan blades, and began to quickly do the movement of cutting magnetic lines, and it is spring, and there is a lot of ice and snow melt in the Orr Mountains, so there is no need to worry about the lack of water flow for the time being.

He then connected the copper wire to the turbine and asked Vina to bury the wire in it while digging a hole.

Fortunately, it was getting late now, and everyone had gone back to rest, otherwise there would have been a group of people coming to watch, and maybe they would have pointed a finger at the witch Vena.

It was already nightfall after burying the wire from the river to the city lord's mansion, and the witches watched the white wire come in from the wall and finally lead it to Felihill's laboratory, and suddenly they all had an idea - maybe this is love.

A simple knife-like switch was made on the wall, and Rafa closed the gate together.

Bright light burst out from the light bulbs hanging overhead, illuminating the bottles and cans stored in the entire laboratory with crystal clear and sparkling, even though it was night, but it was as bright as day.

"How's it going, isn't it?" Patting the dust off his hands, Rafa asked with a smile.

"Hmm...... Not bad, but it would be nice to illuminate more places. ”

"Of course, no problem, as long as you make enough light bulbs, this wire can support several light bulbs at the same time. ”

"Really, can I ...... my room" Shirley has always been afraid of the dark, she has always slept with Lena or Shina, and now that there is an electric light, she wants to try to sleep alone.

"Absolutely. ”

"Great! Long live Rafago!" a happy Shirley immediately crashed into Rafa's arms.