Release that Witch

Chapter 205: microscope

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After pushing back Tifeko's forces, the town returned to calm.

Roland selected three people from the Education Department of the City Hall, plus two teachers to form a team, and went to Longsong Fortress with the books copied by Soraya. No matter how much effect he can achieve, he finally took the first step on the assimilation fortress.

Although Pei Luo was not good at commanding battles, he did excel in administration. In just one week, 2,000 road repairers who were recruited came to the town one after another under the escort of knights. If the second batch of ten kilns hadn't been put into production, Roland would not have dared to make up his mind to establish a hard road between the two places. Now, he finally had the opportunity to splurge.

This road was named Kingdom Avenue by Roland, and was solely in charge of the construction minister Karl. Its structure was exactly the same as that of a small town street. It was a cement-stabilized gravel layer. In the era of no heavy vehicles, such a road was enough to undertake transportation tasks. Moreover, the drainage performance is good, and asphalt or concrete can be added later depending on the situation.

In terms of construction materials, four mills driven by steam engines have replaced manpower to crush the stone, and can produce dozens of tons of crushed stone every day. The weak transportation capacity limits the further increase of the output. So many stones need more than a hundred people to be carried by horse carts for a day before they can be delivered to the construction site.

Except for the four kiln areas that maintain the firing of clay bricks, the rest of the blast furnaces have been put into the production of cement powder. far more than the original batch.

However, the transportation of gravel and cement powder by the large team also brought a lot of negative effects to the town, the most serious one being the problem of dust. In the afternoon, with only a slight gust of wind, you can see dense dust fluttering in the sky, and the streets turn light yellow. Although most townspeople don't mind this situation, for Roland, there is nothing worse than having to close doors and windows on a hot summer day.

Therefore, a cover plate was quickly installed on the carriage carrying the cement and gravel to reduce scattering during transportation. At the same time, under the promotion of the ability of leaves, the town was covered with shade in just a few days, and the leafy plane trees were symmetrically arranged along the street, looking green. In addition, Roland called on all the leaders to sprinkle water and dust, and this problem was quickly improved.

The straight-line distance between the two places is less than 70 kilometers, but considering the need to avoid the foothills of the desperate mountains when building the road, the total length of the road is about 100 kilometers, and the construction period is expected to be one year. With good roads, some forms of transportation such as bicycles and steam cars can also come in handy.

In his vision, the development of education and the construction of roads are all measures to connect the two places, just like the urban integration vigorously promoted in later generations. After the land between the two places is developed, Changsong Fortress and Frontier Town will merge into one huge city. If he can turn the hills at the southern end into a part of the city, and open up the edge mountain range, he will even have an outlet to the sea.

Of course, developing so much land required a larger population, and in order to deal with possible future wars, the city would have to be self-sufficient in agriculture while still providing large numbers of workers for industrial production. According to preliminary calculations, he would need to bring in about 100,000 people, and the largest city in Graycastle, the Royal Capital, only had about 20,000 to 30,000 people.

Roland set his sights on the northern and southern regions of Graycastle, both of which had experienced wars. When the cold winter came, there would likely be a large number of refugees who lacked food and clothing. Just provide them with enough food and warm shelter to absorb them into Border Town. Even the refugees of Yongdong and Wolfheart are also under consideration. To this end, he also wrote a letter and sent it to the businessman Margery, asking her to help inquire about the situation in these two countries.

After writing down the recent development plan, the prince folded the paper and put it in the drawer, stretched, and decided to go to Anna's room to see how her lenses were cut.

Since understanding Soraya's evolutionary reasons, he has planned to make a microscope that can observe the structure of cells.

If you can observe the wonderful microscopic world with your own eyes, maybe it will trigger more witches to evolve new abilities, and no matter how bad it is, it will arouse their interest in learning.

For making a microscope, it is not difficult to have two convex lenses for magnifying the target. The difficulty lies in the different focal lengths of each hand-polished lens. Therefore, matching the eyepiece and the objective is a delicate job, and it is necessary to repeatedly adjust the two lenses. distance.

After he briefly explained the imaging principle of convex lens, he gave Anna a few crystals of excellent quality, and asked her to try to cut the lenses and measure their focal lengths. It has now been three days, and Roland is full of curiosity as to how far Anna has achieved.

Walking to the door of Anna's room, Nightingale smiled at him and stood with her back against the wall, as if to indicate that she would not follow up. Since she reduced the invisibility time, Roland no longer has to guess the other party's whereabouts. When she is alone with Anna , Nightingale always chooses to stand farther away.

Pushing open the door, Anna was sitting at the table fiddling with a metal pipe.

"How?" he asked as he stepped forward.

As soon as he asked the question, Roland was stunned and saw several instruments that looked like microscopes on the table, which were very close to the schematic diagram he had drawn.

"I made a few prototypes according to the drawings you gave me, and I can indeed see many details that are usually difficult to find," she raised her head, and her slender bangs slid down to one side, "I used it to observe the surface of the paper, leaves And Sekisui, and they look very different from normal.” Since the hot air balloon ride, Anna has stopped using honorifics when they are alone, which also makes him feel very relieved.

"How did you do it," Roland was surprised. "That schematic diagram is just a rough outline."

"The outline is enough," Anna smiled, "Look, as long as the eyepiece and objective lens are fixed within a suitable distance, they can magnify, and then fix them with an iron tube, and the main body of the microscope is completed. When I tested the magnification effect of the lens, I found that the objective lens and the observation target must be kept within a certain distance to see a clear image, and it will be blurred when my hand shakes. It can also be seen from your schematic diagram that a stand is required to hold the lens. The tube is fixed, and the platform carrying the target can move up and down to obtain the best object distance." She paused, "This piece at the bottom of the diagram is difficult to understand, can you tell what it is used for? ?"

Roland glanced at the drawing and found that he had made a mistake. It was a reflector, which was used to increase the light passing through the target. In this era, the mercury mirror had not been invented yet. Generally, nobles still used bronze or iron mirrors to organize their appearance. Inside, a silver sheet is pasted on the back of the glass to obtain a better reflection effect. Even without this mirror, the microscope can be used as long as there is sufficient sunlight.

After he explained it in detail, he couldn't help feeling that Anna's astonishing comprehension was able to produce a near-complete finished product based on the rough outline. It was impossible for him to do this.

Looking at the fair neck exposed when the other party lowered his head to inspect the new lens barrel, Roland couldn't help but leaned forward and wanted to kiss it, but she pressed her hand on her face and gently pushed it away, "Wait, Your Highness, I'm busy."

"Well... well." (. If you like this work, you are welcome to come and vote. Your support is my biggest motivation. Please come.)