The next day, the weather was still fine and there was no sign of rain.

Last night, the master and Cui Lan did not go back to Longtan, and Diao and Qiqi still did not come back, but it seemed that Longtan was much more deserted, so early in the morning, after Lin Bei took a bath, he went directly to the school.

The bonfire was curling, and the smoke was not exhausted, Lin Bei glanced at it, and did not see An Zhongzhi and them, but he saw a few craftsmen standing on the edge of the biogas digester with red eyes, I don't know what they were talking about, I was very surprised, Feng Niangzi was actually in it,

"Is there progress?" Lin Bei guessed, so he moved over.

When the craftsmen saw Lin Bei, they stopped talking, and they were afraid to salute Lin Bei, and Feng Niangzi also saluted Lin Bei, Lin Bei waved his tail, signaling that he didn't need to, and he wanted to ask what they were doing, and he knew that these people were illiterate.

It's not the first time these craftsmen have seen Lin Bei, and they know that the adults in front of them are very good, and this biogas digester is also very important to the adults in front of them, because Feng Niangzi is very familiar with adults, so they all look at Feng Niangzi and signal her to talk to adults.

"My lord, the craftsmen are discussing the matter of this digester." The word biogas digester is still a bit awkward.

Lin Bei nodded and motioned for them to continue.

A craftsman in his forties said, "My lord, I discussed it yesterday, and the most important thing in this biogas digester should be that gas, right?" ”

Lin Beixin said yes, biogas biogas, the gas produced by filth is the most important, so Lin Bei will let them seal the biogas digester, otherwise the biogas leakage will easily cause strict consequences, it seems that these craftsmen do have some skills.

"We need to seal this air, and at the same time the material must be cheap and widely available, and we think that the only way to make it is to use sheepskin or cowhide, or to imitate the method of making the water bags in the army, and it just so happens that the adults have caught a few bison, and we are going to use the bison skin." Another craftsman said.

The bison were eaten by the people, but the skin was still there, so it was ready-made, but how? Lin Bei looked at them, hoping that they could give an answer.

Suddenly, a craftsman pointed at Feng Niangzi: "My lord, Feng Niangzi's husband's surname is Ma, I have heard what Mrs. Ma said, they are members of the Ma family in Qingzhou, and the ingenuity of the Ma family is unparalleled in the world, so we called Feng Niangzi, hoping that Feng Niangzi can give some advice." ”

Qingzhou Ma family? Lin Bei looked at Feng Niangzi, is this Qingzhou Ma family very famous? Lin Bei thought about it in his mind, but he knew a few celebrities with the surname Ma, such as Ma Liang and Ma Yan, but they were not from Qingzhou, but from Xiangyang, that is, from Hubei in later generations, Lin Bei may mistake the place name of this era, but the people of the Three Kingdoms will not get the wrong place name.

Feng Niangzi bowed slightly, and said softly: "Xiangyu is only married to her husband for half a year, usually in addition to hunting, her husband will do some strange things, and her mother-in-law will occasionally give you some pointers, so when it comes to these strange skills, her mother-in-law is more powerful than Xiangyu, but now that her mother-in-law is sick in bed, Xiangyu also wants to share her worries for adults, so she comes with a cheeky face." ”

A craftsman said: "Little lady Feng is polite, the skills of the Ma family's organs are known to the world, even if they only know one or two, they are better than us." ”

The more Lin Bei listened, the more surprised he became, is the Ma family in Qingzhou so famous? can make these craftsmen in remote areas think that even an outsider is just marrying the son of a clan member of the Ma family, and these craftsmen also think that Feng Niangzi is better than them.

"Your Excellency." An Zhongzhi's voice sounded in the distance, and then trotted over: "Your Excellency came very early today. ”

Lin Bei couldn't care about greeting An Zhongzhi, and hurriedly wrote: "These craftsmen said that there is already a way to make a biogas digester, you let them say it well, let me listen." ”

An Zhongzhi was also overjoyed in his heart, and hurriedly asked, and the craftsmen gossiped, and finally said a rough idea.

Of course, no matter how the craftsman is, Lin Bei is concerned about the sealing performance of the cooked cowhide, and the craftsmen are ready to use the method of making zuò water bags in the army, the reason why Feng Niangzi is called, is because Qingzhou Ma Jiazu has served the army and made this kind of water bag, this kind of water bag is still used in many armies, and the quality is quite guaranteed, the craftsmen said that as long as the zuò comes out, There will definitely be no problem that Lin Bei is worried about.

Although the craftsman said so, Lin Bei still said: "Do you know that the biogas digester also needs an inlet to pour filth, an outlet for filth and an outlet for iron pipes, in which the inlet and outlet may need to be used constantly, and there will be no problems with this aspect of sealing?" ”

The craftsmen looked at each other, but Feng Niangzi asked, "My lord, can the biogas digester be stopped when this outlet and entrance are in use?" ”

"That's fine."

"Then it's no problem, just seal it with cowhide when the time comes, and ensure that it looks the same as before."

Since the professionals say so, Lin Bei can only trust, "So when can it be made?" ”

The craftsmen discussed it for a while, and the old craftsman at the beginning said, "My lord, I should be able to make it the day after tomorrow." ”

"Okay, that's going to be hard."

"It's just a matter of duty, I can serve the adults, I am fortunate, and I thank Mrs. Feng for her advice."

After Lin Bei left, these craftsmen first went down to the pond to measure the length and width of the biogas tank, and kept it in mind, and then a craftsman returned to Xishan Township, found a few women who could make clothes, and asked them to sew the bison skin, don't sew it like this, when sewing it into a bag, the craftsmen have to concoct it by hand, and finally blow air into it, plug it and throw it into the water to test, where there are bubbles so that it will be clear at a glance, and when there are no bubbles to see through, it will be disassembled again, and then the cowhide will be pasted into the pool.

Lin Bei didn't ask about these things, because Lin Bei trusted the heirs, but An Zhong asked a question directly: "My lord, if you use bison skin to make a biogas digester, will it cost a little." ”

It is indeed very expensive, bison is not available everywhere, and domestic cattle are not easy to kill in this era, An Zhongzhi thinks that this is completely inconsistent with what Lin Bei said at the beginning, that is, to use the cheapest and best materials.

Lin Bei nodded: "That's true, but you can make a sample first, and then improve it later." ”

As long as a finished product is made, everyone sees the usefulness and benefits of the digester, and there will definitely be motivation to work hard to improve, at least Xishan Township has to be popularized, what if there is no bison skin? In fact, many ancient technologies are still very amazing to modern people even if they are put into modern times, such as the terracotta warriors and horses of the Qin Dynasty, those weapons have undergone a special chromization treatment, and they are still not bad for thousands of years, and even more powerful than modern stainless steel technology.

ps: Some things don't need to be too serious, such as this biogas digester, I just want to write more detailed, if I don't write fine, then you can directly pass it off, saying that these craftsmen have studied it, as for the inner tube of the biogas digester with this cowhide, you can try it according to the party, haha.

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