The biogas lamp that Luo used them to make this time is no different from an ordinary lantern at first glance. If you lift the outer cover of the lantern and look carefully, you will find that there is a mesh yarn cover between the wick and the lampshade. This mesh is the key to the biogas lamp.

This mesh is made of fine and tough linen, and then a layer of thorium oxide is applied to the outside of the linen. After the biogas lamp is ignited, this layer of thorium oxide will be heated and will burst out with bright light.

Because the heating and luminescence of thorium oxide requires a process, this biogas lamp is not very bright when it is just lit, and then it will gradually become brighter during the heating process of thorium oxide.

When Luo Yong was collecting agricultural products in the countryside in his previous life, he also saw biogas lamps. At that time, the biogas lamps were also composed of three parts: lamp holder, mesh, lampshade, and lampshade.

The difference is that the mesh at that time was made more exquisite than the mesh they are now. The thorium oxide is also purified, and the lampshade outside is made of glass, so the biogas lamps made naturally brighter.

However, their biogas lamp is not bad, it is much better than candle oil lamps.

The location of the first biogas pool was built on an open space next to the county government, which was the location of the tofu shop in the past. The tofu shop was closed earlier, and the land was conveniently vacant, which turned into a leisure place for the people in the city.

This biogas pool does not take up much space. It was seen that behind the tofu shop, the corner used to store firewood and debris, started construction last winter. After the biogas pool was repaired, a lot of materials were poured down to ferment. After the spring of this year, the ice melted. Luo Yong asked someone to take a wooden stick and poke it, ventilate it, and then some horse manure was taken. Within a few days, the temperature inside the pool increased.

The structure of the biogas tank is simple and simple. Overall, it is almost like a pressure cooker. The materials below ferment, and the gas generated gathers towards the dome above. In the middle of the dome, that is, the highest point, there is an air outlet. Nowadays, the biogas used by the people in the city to light lamps comes from this air outlet.

If we talk about it in a complicated way, the outlet and outlet are divided into liquid and solids, and these places are all given.

This time they were working on a water pressure biogas tank, and a water chamber was built next to the main body of the biogas tank. When the biogas in the biogas tank was too high, the biogas liquid in the pond would squeeze the water chamber. As part of the liquid was discharged, the air pressure in the biogas tank would naturally fall. At this time, the water chamber was equivalent to a safety device.

When the biogas in the biogas tank is low and the pressure is small, the biogas liquid in the water will flow back, increasing the pressure in the biogas tank to a certain extent, and squeezing the biogas to the air outlet, which is conducive to the collection of biogas.

Although it is just a small biogas pool, it actually embodies the wisdom of many people.

The biogas produced by this pond is first used for lighting in the county government and the main street in the city. The pipe that induced the air is made of ceramic. It looks about two fingers thick outside and is about two or three feet long. There are also elbows. The pottery between the pottery pipe and the pottery pipe is then wrapped with a casing of sheep intestines to prevent air leakage.

There is a switch under each biogas lamp. There is also a main switch on the air outlet of the biogas tank. This switch is turned on every evening and closed late at night, and then turned on at three or four o'clock the next day, and then turned on after dawn.

For biogas lamps like this, you only need to pay a three cent gas fee to the public government every month. In order to thank these merchants for their contribution to the public government's finances, Luo Yong did not charge them for their account opening fee, and allowed people to take biogas to their doorstep for free, and even gave a biogas lamp for free.

After the biogas lamp was made, Luo Yong was very happy. They had just lit the biogas lamp for a few days, and just as soon as Du Gou and the others came, Luo Yong proudly introduced the principles of the biogas lamp and biogas tank to him.

Du Gou was very involved in hearing this, and sighed at the ingenuity of the biogas lamp and the biogas tank. Even the small switches were very much wanted to take apart and study them carefully.

"If you want to see it, just go to the Machine House to see it another day, but you still need to put the matter of the canal as the first priority." Luo Yong said to him.

"That's nature." Du Gou agreed.

Du Gou knew that the reason why Luo Yong handed over the construction of the canal was not only to repair the canal, but also to arrange his future.

Although it is also an infrastructure construction, the construction of canals is a very expensive thing in the eyes of scholars. After all, it is related to agricultural production. In the eyes of scholars, in this world, except for the gentry, it is considered a regular businessman. Although it is poor, it is not low. Building such a water diversion and irrigation project will benefit the people.

In ancient times, Dayu controlled the flood, and Qin prefect Li Bing built Dujiangyan in Shu County, which was also said to be a beautiful story.

Now if Du Gou could build the canal in Changle County, although it could not be compared with the ancients, he would have gained some reputation.

Since his father Du Ruhui died, Du's management in their branch was really ugly. After suffering from the pain of exile this time, Du Gou had the idea of ​​climbing upwards.

No matter whether he can be used by the court in the future or gain a little reputation, it will be better than being despised and ridiculed by others now.

The newly opened wine shop where the welcoming banquet is very spacious. Several biogas lamps are lit in the lobby, and the illumination is everywhere. The dishes are served one by one, and even the ingredients of the onions, garlic, and peppers on the plate can be seen clearly.

It was not difficult to see things at all, and the mood was more relaxed. The journey ahead was hard, and I finally arrived at the place. Everyone was happy during the meal, so they couldn't help but drink a few more drinks.

When Du Gou woke up the next day, it was almost noon. The young man from Laizhou who came with him had already gotten up. At this time, he said he wanted to give him a wash water, but Du Gou stopped him: "I'll go by myself."

There is a room specially used for washing in this county government. They just arrived yesterday afternoon.

"Then I'll go and get some food with you." The young man said.

"Yes." Du Gou nodded and agreed.

The young man is named Xia Yan. He is the son of a local merchant in Laizhou. Although his family is rich, he has no status in the local area. He is intersected with those families with real power. He is exploited and often despised.

Xia Yan followed Du Gou all the way, and wanted to get a chance to make a comeback.

A few years ago, Xia Yan went to join Du Gou when he started making canned fish in Laizhou. Later, Du Gou was exiled, and he escorted Du Gou all the way to the south with several other young and strong men in Laizhou.

Now they came to Changle County. Because of Luo Yong's arrangement, Du Gou felt that his future was much brighter, but for Xia Yan, who had always followed him, he could not do anything for him. He just hoped that he could achieve something in the future and repay Xia Yan's loyalty to him.

There is also Luo Yong’s trust in him, the rescue of the Bai family this time, and the kindness of the elders of Laizhou.

After Du Gou washed up and returned to the house, soon after, Xia Yan also brought food from the front yard.

Because breakfast time had passed, the chef in front of him made some simple things for him, a plate of egg cakes that were fried softly with egg noodles, a small bowl of dipping sauce made with vinegar and oil and chili, a large bowl of corn porridge, and a plate of sliced ​​tender courgette.

Du Gou first picked up a piece of egg cake and dipped it in vinegar sauce to eat it. It tasted quite good. Then he picked up a piece of courgette, which was very refreshing. The corn porridge was a little cold, so it must have been cooked in the morning and kept until now.

After breakfast, the two of them went to the front yard. When they heard that Luo Yong was working, they did not disturb him. They left the county government and planned to stroll around the city.

Since Luo Yi came to Changle County, this dilapidated small county town has gradually changed. The streets have been paved with cement pavement and the city walls have been rebuilt.

Because there are many merchants and the city has developed commerce, many new shops have been built in recent years. Many families in the county have renovated their houses when they are more affordable.

Now, looking around, the houses in the city are large and small, and they look pretty neat.

However, there are still very few tall houses. Some places still have dilapidated cottages that were once in the past, and some large houses look older. Whether it is a big house or a small house, they are all straw shed roofs.

The small town in front of me is naturally a bit shabby compared to the scene he saw in Chang'an City a few months ago. But compared with other places they have walked along the way, it is already quite rich.

Earlier, when Du Gou was exiled to Lingnan, there were many towns and villages along the way. The closer he got to Lingnan, the more people there were to be wary of outsiders, especially in some rural villages. However, Du Gou and others also saw the difficulties of their lives.

Du Gou was walking in the city while sighing in his heart that before he could walk far away, he saw many people walking out of the city together, talking and laughing along the way, and walking very fast.

Xia Yan went over and asked, and learned that there was another batch of carbonite outside the city today, which was transported from Yiwu. The station should be recruiting unloaders. Although the unloading work also requires some effort, the money is much easier than grinding a needle.

Du Gou and the others did not leave the city with them, but went to the city wall. The patrol officer knew that Du Gou was Luo Yong's newly recruited disciple, so he did not stop him.

When they climbed onto the city wall and headed towards the wooden track, they saw carriages driving along the track from afar, and there were also carriages that had entered the station, with wooden boards all around, but the tops were empty, and they were not afraid of the carbide in the carriage being rained. Looking down from them, they could see trucks of black carbide.

At this time, the car was very lively, with inspections and unloading arrangements. On a clearing area not far from the car, rows of straw sheds were built, which seemed to be used to store charcoal.

The people who had just left the city soon found work and followed the cargo cargo to the warehouse to unload the goods. They held tools such as shovels and spoke loudly, probably talking about the warehouse that the manager had just mentioned. They knew the location and went wherever they were going.

In addition to these adults working, there are also some half-grown children carrying baskets wandering around the station. They pick up horse manure here. There are many horses entering and leaving the station every day, and there are also many horse manures. These horse manures can be picked up and used to make a fortune.

If they encounter a carbonite that falls on the ground, they will also pick it up. They need to use this carbonite pottery workshop, save more and carry it over, and exchange it for some pottery jars and bowls with them. They are all things that they need to use at home.

Du Gou and Xia Yan stood on the city wall and watched the busy scene under the city. Neither of them talked much, and they didn't speak at this time, just watched silently.

After a long time, Xia Yan suddenly said to Du Gou: "It would be great if all the towns in the world could be like Changle County."
Chapter completed!