According to the construction plan, Roland arranged an equipment room at each well point to accommodate all the equipment needed for the Three Connections for ease of management.
The whole set of equipment included a steam engine, an electric motor, a power supply, a boiler, and two water tanks. Together with the water tower outside the room, the whole Three Connections system was formed.
The steam engine was responsible for pumping the water from the well to the water tower and the water tank. The former was mainly used for domestic water supply, while the latter was used for heating water for the boiler. The first-level water tank was higher than the ground, with limestone and washing stones suspended in it to soften the water by precipitating magnesium and calcium ions in the water. The purified water would be directed to the second-level water tank, which was located lower, and any floating objects in the water would be blocked by Soroya's special filter mesh.
The water supply to the boiler was done by the electric motor. When the internal water level was too low, the float valve would be activated, and the electric motor would start to pump water until the water level returned to normal. This process was much more stable than adding water manually or using the steam engine, and it also eliminated the need for people to observe at all times.
Since the water supply and heating system had been verified in advance, there was naturally no difficulty in the construction. The key was the power supply system, which was the first time for the town. Neither Carr nor the other members of the Mason Guild knew anything about electricity, so Roland planned to make a small model in the yard first, and then explain it to the Ministry of Construction after it was successful. After all, he did not know much about electricity, and his knowledge of circuits was basically at the high school level.
With a reliable and stable power supply, the first step should be to create a qualified electrical equipment, namely, a light bulb.
Thinking of this, Roland put on a thick coat and set out for the backyard of North Slope Mountain.
Traveling through the mist of Nightingale, it took him only three or four minutes to reach the destination, which should have taken a quarter of an hour.
When he opened the wooden door, Anna and Lucia immediately noticed him, but Anna was busy with her work and only nodded at him, while Lucia ran to him happily. "Your Highness, good morning."
"Good morning." Roland nodded with a smile, then walked to Anna and asked, "What are you busy with?"
"A new barrel and locking mechanism." She pointed to several long steel barrels on the table seriously. "Your drawings are a bit unreasonable, so I think it would be better to make some changes."
"My Na," Roland could not help but reach out to touch her head, but she shook her head and refused. "Hmm..." He seemed to have seen this scene somewhere before. He coughed twice, restrained his teasing mood, and said, "Well, do it your way."
Roland did not mind her questioning his design. After all, he had deduced the gun blueprint based on the theory. It was normal for there to be mistakes and room for improvement. Moreover, Anna's learning talent and comprehension ability were far better than his. He felt that one day, her understanding of knowledge would reach a level that even he could not reach.
After a while, Anna put down the parts in her hands, walked to and walked to Roland.
"Uh..." Roland could not help but be surprised. "Is she going to make up for the previous touch?"
He tried to rub her soft hair, and Anna raised her head in satisfaction. "Do you have something new you want to try out?"
"Ah... yes." The prince looked at Lucia. "How is the separation of the messy ores in the mine going?"
"It's basically done. The results are all here." Lucia handed him a stack of books. "But I'm afraid it will take a long time to test the mixing of the ores with the steel, because there are too many simple elements that have been separated."
"It's already very good to be able to do this," Roland said approvingly.
This was also an extension of the material improvement plan. Compared with the previous control of the carbon content and the elimination of impurities to obtain high-quality steel, the elements involved now had expanded to the resources that the entire North Slope Mine could provide. There were not many tricks in this part of the content, but only a little bit of experimentation.
Roland spread out the books, checked the characteristics of the various unknown minerals in the yard, and soon found the element with the highest melting point. He pointed to the column marked Test Item No. 12. "Where is this ore?"
Lucia immediately found the test samples, which were sealed in a transparent coating bag. One was a raw stone, and the other was a bag of decomposed elementary particles.
As for the black raw stone, Roland felt that he had seen it somewhere before.
"Wait, isn't it the same as the black stone that was sent to my office before?" Ever since he handed it over to the alchemist, he had forgotten about it and never paid attention to it again.
"But it turned out to be the mineral with the highest melting point in the North Slope Mountain?"
In the record book, Anna could not accurately mark the specific value of the melting point, so she could only use words to describe it. Between ordinary, high, and relatively high, only its characteristics were written as extremely high.
As for the bag of elementary particles, they were silver-white like most of the metal elements, and there was nothing different about them.
"Is this thing tungsten?
But it doesn't matter, as long as it is difficult to melt. "
Roland asked Anna to process it into a very fine metal wire, twist it into a spiral shape, and fix it on the glass shelf. Then, he put the shelf into the glass bulb, and the main part of the electric lamp was completed.
Of course, there were still two steps to make it stable, and this was also the most difficult part of the lamp technology. The first step was to vacuum it to prevent oxygen from reacting with the filament, and the second was to seal it to prevent air from entering the lamp.
Without a doubt, these two steps could only be done by witches.
The first thing Roland did was to find Agatha.
The main reason for vacuum was that the filament would become extremely active under high temperature, and it was easy to oxidize and produce new oxides, which would cause the filament to melt. To achieve this effect, filling the filament with non-reactive gas would be equally effective, or even better.
And pure nitrogen was an excellent filler.
Using the principle that nitrogen was lighter than air, a simple downward exhaust method could easily fill the lamp with nitrogen, which was much simpler than the vacuum step. When nitrogen was also discharged from the other end, and Soroya was responsible for sealing it, a simple incandescent lamp was completed.
Looking at the palm-sized electric lamp in his hand, Roland's heart was filled with emotion. This thing, which had been eliminated in the future, now represented the highest level of production in Border Town.
The next night, he summoned all the members of the City hall to the front yard of the castle, and at the same time ordered the guards to extinguish the torches in the yard.
In the snowy night, when dusk covered everything, Roland turned off the switch of the circuit.
In an instant, an orange-yellow light lit up in the center of the courtyard. It was not like a candle that would be extinguished in the cold wind, nor was it like a bonfire that flickered. The illumination range was not large, only about a few meters, but the stable light in the wind was something that people had never seen before.
At this time, there was no need for any explanation.
The people's unblinking expressions and the quiet scene explained everything.
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