It's been four days since the witch and the First Army set off, and according to the plan, they should arrive on the outskirts of Silverlight City tomorrow afternoon. Pen, fun, pavilion www. biquge。 info

Equipped with a honey-flying messenger, Roland received letters from his team every day, from Iron Axe, Anna, and Nightingale, to the speed of a mobile phone, and to the extent that wireless telegraphy was almost the same. If there were several times as many flying messengers on this route, and there were birds going back and forth between the two places all the time, it might be possible to simulate the effect of text message chat.

In the absence of the nightingale, the chief knight took over the task of defending the castle. However, what puzzled Roland was that Carter always looked happy these days, and seemed to have encountered something extraordinarily happy. Is it so joyful to return to your job and be responsible for protecting yourself?

He shook his head and focused on the briefing of the Minister of Construction, Carl Van Burt.

With the help of the Witch of the Sleeping Island, the construction project in the border town has progressed rapidly in the past month or so.

First of all, the steel bridge over the Chishui River was successfully completed - compared to the traditional stone and wooden bridges, the steel bridge can be pre-fabricated and then hoisted as a whole, and the two floating islands raised in the lotus river further simplify its erection difficulty, so that the construction period of the main bridge can be shortened to an astonishing month.

Although it was short and narrow, too rudimentary, and had a very low load, it was a waste of materials, but it was a magnificent super bridge in this era - more than 100 meters long, and the bridge deck was straight enough for two horse-drawn carriages to pass side by side, and the lower part could be used for river sailing boats, which was not something that a bulky stone bridge could do.

Secondly, the newly built wall of Lotus was also closed. The mud-filled walls more than tripled the size of the town, and if it were to be built in the future, the town would become a veritable "inner city". However, Roland prefers the idea of one ring and two rings, and perhaps one day in the future, this place can also be expanded into a giant city with seven rings, officially crowned as the imperial capital.

Finally, the construction of the Kingdom Road, some of the foothills that spread down the desperate mountain range were lowered to the ground, so that the road could pass straight, greatly reducing the total construction period.

"Your Highness, what is the next step in your construction plan for Lian?" Karl asked after reporting on the progress.

It can be seen that he is full of envy for his ability to transform the terrain, but he has not asked in person to include her in the Ministry of Construction and appoint a deputy minister.

"Well......" Roland is also thinking about this question, and he has three major renovation projects to implement in the future.

The first is the project of an outlet to the sea: finding a low gap in the southern mountain range and settling into a road that can enter and exit the shallows, which must be done by the ability of Lian. Once the renovation is complete, the Westside has a harbor facing the sea.

The second is residential expansion: despite the city's investment in building a residential complex, nearly 3,000 people may not be able to live in warm brick houses when winter comes. The wooden huts and simple shelters he had erected today could not meet the needs of the cold, so he needed a number of cave houses with thick walls and ondols to solve this problem.

The last point was to set up a dock: in order to produce a shallow water heavy gunboat, he had to build a spacious dock without affecting the passage of the Chishui River. Roland planned to lower the height of a river embankment at the west end of the town to form a dry dock, and to install a lifting gate on the side of the Chishui River to control the retention and release of water. The scale of the earthwork is huge, and it also depends on Lian's ability to complete.

After thinking about it for a while, he finally decided to put the expansion of the house first, since he brought the fugitives from the east to the border town, he had to take responsibility for their food, clothing, shelter and transportation. If you freeze to death and starve to death, it will not only be a loss to the western realm, but also reduce the sense of belonging of the people to this place.

"So where is this temporary dwelling built?" Karl asked.

"Just in the current serf shantytown," Roland said, glancing at the map, "far from the city walls, there are desperate mountains to shelter from the wind." ”

When the Minister of Construction retired, he was about to take a nap in his chair when Kemo Stoll came to the door again.

"Your Highness, I have successfully developed the large-scale acid production method you requested. ”

This sentence immediately dispelled Roland's tiredness, and he stood up from the table in surprise and said, "Really, take me to see it." ”

When the group arrived at the laboratory by the Chishui River, they saw several gray-white jars and a furnace set up next to Laboratory No. 5, each jar was about two people high, and the top was connected by a pipe, and the regular and smooth shape was obviously cut by Anna.

"Greetings, Your Highness," a young man who looked very young bowed to Roland.

"You're Chames, aren't you?" Although he had known for a long time that Kaimo had dug up a group of alchemy apprentices from Chishui City and recruited an outstanding alchemist, it was the first time he had seen the other party's appearance today.

"You remember my name," Chamez was amazed.

"Mr. Cammo has mentioned you many times," Roland patted him on the shoulder as a sign of encouragement, "do a good job." Then he looked at the chief alchemist, "How does this thing make acid?"

Kaimo stroked his beard and smiled, "It can be successfully developed, and it is completely derived from the reaction formula in "Elementary Chemistry". You look at the kiln, where the purified sulfur is burned and the resulting gas is further heated and fed into a lead tank. ”

"Are these devices made of lead?"

"That's right, only lead is resistant to acid. Kemo nodded, "The lead pipe at the top of the jar is constantly sprinkled with nitrate sulfuric acid, and under the scorching sulfur dioxide gas, nitric acid is heated and decomposed into nitrogen oxides, and finally with water and sulfur dioxide to form a sulfuric acid solution, which flows out of the hole at the bottom - the ingenuity of this reaction is that nitrogen oxides only play the role of transferring oxygen, and it is not consumed itself, so the amount of nitric acid is not large, and once the reaction starts, the energy will continue continuously!"

"How does it yield?" Roland asked, excitedly patting the lead can. Large-scale acid production is a prerequisite for mass production of smokeless gunpowder, and if this problem can be solved, there is hope for a new generation of ammunition for repeating muskets and artillery.

"This is the fourth unit I've tried to build, and the output in one day is about as much as a week's worth of dry distillation in the laboratory. The chief alchemist said proudly, "Because of the element of experimentation, its volume is not large. If larger lead tanks can be built, the output can be further increased. ”

"That's good news," laughed Roland, "and when Miss Anna returns, you'll be ready to start building a larger acid-making plant at once." In addition, if the lead is not enough, iron can be used instead, and Miss Soloya's coating can protect the iron from acid. ”

Kemo nodded in response, but his next sentence made the prince's smile freeze on his face.

"Now that the large-scale acid production method has come to fruition, and all five laboratories are filled with apprentices, will your Highness be rewarded with the medium chemistry you promised?" (To be continued.) )