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

Roland selects three people from the City Hall Education Department, plus two teachers to form a team, and takes Soloya's copied books to the Long Song Fortress. No matter how effective it was, he had finally taken the first step towards the Assimilation Fortress.

Although Perot was not good at commanding battles, he did excel administratively, and in just one week, 2,000 recruited road builders came to the town one after another, escorted by knights. If it weren't for the second batch of ten furnaces going into production, Roland would not have dared to make up his mind to build a hard road between the two places, and now he finally had the opportunity to squander it.

Named the Kingdom Avenue by Roland, the road was under the sole responsibility of the Minister of Construction, Karl, and was constructed exactly like the town's streets, with a cement-stabilized gravel layer, which was sufficient for transportation in the days when there were no heavy trucks. Moreover, the drainage performance is good, and asphalt or concrete can be added in the future depending on the situation.

In terms of construction materials, four steam engine-driven mills replace manpower and crush the stone, producing dozens of tons of crushed stone every day. The lack of transportation capacity limited the production to further increase, and it took more than 100 people to carry the stones in a horse-drawn cart for a day to reach the construction site.

In addition to the four kiln areas to maintain the firing of clay bricks, the rest of the blast furnaces have been put into the production of cement powder, after many composition tests and iron powder supplied by the mine, the quality and stability of the cement produced in the town are far more than the original batch of products.

However, the large number of people transporting gravel and cement powder has also brought a number of negative effects to the town, the most serious of which is the dust problem. In the afternoon, with only a slight breeze, you can see dense dust billowing in the sky and the streets turning pale yellow. While most of the townsfolk didn't mind it, there was nothing worse for Roland than having to close his doors and windows on a hot summer day.

Horse-drawn wagons carrying cement and gravel were quickly fitted with covers to reduce scattering during transportation. At the same time, thanks to the ability of the leaves, the town was covered in shade in just a few days, and the leafy plane trees lined up symmetrically along the street, giving it a green look. Coupled with Roland's call on all the people to take the initiative to sprinkle water and reduce dust, the problem was quickly improved.

The distance between the two places is less than 70 kilometers in a straight line, but considering that the road will be built to avoid the foothills of the desperate mountains, the total length of the road is about 100 kilometers, and the construction period is expected to be one year. With good roads, some means of transport can also come in handy – such as bicycles and steam carts.

In his vision, whether it is the development of education or the construction of roads, they are all measures to connect the two places, just like the integration of cities and towns that was vigorously promoted in later generations. Once the land between the two places is developed, the Changge Fortress and the Frontier Town will be merged into one sprawling city. If he could turn the hills at the southern end into a part of the city, and open up the edge mountains, he would even have an outlet to the sea.

Of course, it would take a larger population to open up so much land, and in order to cope with a possible future war, the city would have to be agrologically self-sufficient while also providing a large number of workers for industrial production. According to preliminary calculations, he needs to bring in about 100,000 people, and the largest city in Gray Castle, the royal capital, is only about 20,000 or 30,000.

Roland has set his sights on the north and south of the Grey Keep, both of which have been experiencing war, and when winter comes, it is likely that there will be a large number of refugees who will lack food and clothing. All they need to do is provide food to feed them and warm shelter to absorb them into the border towns. Even the refugees of Yongdong and Wolfheart are in his consideration. He also wrote a letter to the merchant Margaery, asking her to inquire about the situation in the two countries.

......

After writing down his plans for the near future, the prince folded the paper and put it in a drawer, stretched, and decided to go to Anna's room to see how her lenses were cut.

Ever since he learned about the evolutionary reasons for Zoroya, he had set out to make microscopes that could observe the structure of cells.

If you can observe the wonderful microcosm with your own eyes, it may trigger more witches to evolve new abilities, and even if they are not good, they will be able to arouse their interest in learning.

The difficulty in making a microscope is that the two convex lenses used to magnify the target are not difficult, but the difficulty lies in the fact that each of the hand-polished lenses has a different focal length, so matching the eyepiece and objective lens is a delicate task, and the distance between the two lenses needs to be adjusted repeatedly.

After explaining the principle of convex lens imaging, he handed Anna a few crystals of excellent texture and asked her to try to cut the lenses and measure their focal length. Now that three days have passed, Roland's heart is full of curiosity about how far Anna has gone now.

Walking to the door of Anna's room, Nightingale smiled at him and stood with his back against the wall, as if to indicate that he would not follow - since she had reduced her invisibility time, Roland had no longer had to guess the whereabouts of the other party, and when she was alone with Anna, Nightingale would always choose to stand farther away.

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

"How's it going?" he asked.

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

"I did a few prototypes according to the drawings you gave me, and I could see a lot of details that are hard to find in normal times," she said, looking up her head and sliding her slender bangs down to one side, "I used it to look at the paper, the leaves, and the standing water, and found that they were very different from what they usually look like on a regular basis." Since the hot air balloon ride, Anna has stopped using honorifics when the two of them are alone, which also makes him feel very relaxed.

"How did you do it," Roland said, surprised, "and that diagram is just a rough outline. ”

"The contours are sufficient," Anna laughs, "you see, as long as you fix the eyepiece and the objective lens at the right distance, you can magnify it, and then hold them in place with an iron tube, and the main body of the microscope is complete." When I tested the magnification of the lenses, I found that the objective lens and the target had to be kept at a certain distance to see a clear image, and it would be blurry when I shook my hand. As you can see from your diagram, a shelf is needed to hold the lens barrel in place, and the table carrying the target below can be moved up and down to get the optimal object distance. She paused, "The piece at the bottom of the diagram is hard to understand, can you tell me what it's for?"

Roland glanced at the drawings and realized that he had made a mistake - it was a reflector used to increase the amount of light passing through the target, and the mercury mirror had not yet been invented in this era, and the nobility still used bronze or iron mirrors to tidy up their appearance, and in the palace, silver plates were 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 enough sunlight.

After he explained it in detail, he couldn't help but feel that Anna's astonishing comprehension was that she had made a near-complete finished product based on a rough outline drawing, which would never have been possible for herself.

Looking at the white neck that was exposed when the other party lowered his head to inspect the new lens tube, Roland couldn't help but step forward and wanted to kiss it, but she pressed her hand on her face and gently pushed it away, "Later, Your Highness, I'm busy." ”

"Hmm...... All right. (To be continued.) )