In this class, Professor Wang Defa showed the Da Song technical students a picture of a small gas generator, which he easily drew with a brush last night. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

Hehe, the structure is simple, but it is actually an iron box.

He originally wanted to find a Song blacksmith to cast one, and there were seven or eight blacksmith shops in the county.

But considering the problem of time, and it would be too wasteful to simply use it as a teaching aid after casting, I talked directly to the drawings, so that they knew that there was such a thing, and we didn't have ulterior motives for popular science.

When he talked about this, the Da Song technician students he recruited listened to it with relish.

Most of them have seen and at least heard of how to make charcoal, but it is unheard of to be able to make charcoal gas from charcoal.

When Professor Wang Defa was in class, he directly called the gas charcoal, which had the advantage that the people of the Great Song Dynasty called coal coal, which was convenient for future use.

Yalang Ma Yun thought to himself beside him, they can really come up with a way, they can actually use fire to force out charcoal gas, that charcoal gas can actually burn and cook, and there is a huge poison!

It's just that he didn't see the real thing, and he didn't know whether it was true or not, but judging from the last class, he was afraid that it was true.

Professor Wang Defa also drew a biogas digester and explained the biogas to be produced in the future.

The Da Song technician students also listened with relish.

Of course, Professor Wang Defa resolutely did not talk about the scientific truth, saying that he was looking for a sick person, just telling them that there is such a thing, and let them give full play to the folk scientific spirit of knowing what it is and not knowing why it is true.

I didn't expect them to have associations.

Guo Ziren suddenly said: "Dung can produce biogas, and it can also light a fire to boil water...... I've never seen anyone fart on fire......"

Xiao Xiang laughed and said, "Exactly, exactly!" Horses, cows and sheep can also fart, and a certain has never seen a fire......"

Professor Wang Defa was not angry, he said lightly: "Don't worry, you will be responsible for the feeding of the biogas digester in the future......"

The two thought about it, looked at each other, and felt bad.

Someone took the opportunity to make trouble, and Professor Wang Defa shouted:

"Gu Jianshan, you stand up for me! You're talking secretly down there again! ”

Gu Jianshan stood up and said, "It's not nonsense...... Professor Wang, I have seen in a place in Sichuan that he blows out qi from the ground, guides it with a bamboo pipe, and uses it to boil salt and brine it into salt. ”

Professor Wang Defa did not expect that Sichuan would start to use natural gas to cook salt so early, and immediately said happily: "Well, if you can describe the scene you saw, I don't blame you for speaking in private." ”

Gu Jianshan had already let go of his mind at this time, and he saw Professor Wang Defa's face blooming with joy.

He began to speak smoothly.

This guy really has the talent of a storyteller, and everyone sees the busy scene of Sichuan well salt production in his depiction.

In the rolling hills around it, there is a tall derrick made of bamboo and wood, and four people are drawing salt brine from a water well, and after lifting it, they use a wooden trough to introduce it into a distant stove.

There were three more people operating by the stove.

There are several large iron pots placed side by side on the stove at the stove pot, and there are several open bamboos arranged at the stove door below, they are all copper-headed, leading to the bottom of the pot, these bamboo pipes side by side, conveying the air from the ground, which can be burned, and the flame is half a foot high, it is blue, and there is no soot...... They burn incessantly under a salt pan, slowly boiling the salt brine.

At this moment, there was a cloud of smoke between heaven and earth, and there were many people on the stove, and only the sound of human voices and the cooing of salt brine could be heard in the ears.

Soon, when the smoke cleared, the salt of the white flowers would appear at the bottom of the pot.

This guy is really good, or maybe Ma Yun relayed it better.

The third prime mover fuel in the Hongshuixi Industrial Zone is biogas, which of course is only a standby type.

The principle of the biogas digester is understood by those who can see it, so I won't talk about it much.

Zhang Guoan said with a smile: "In the countryside of my hometown, there have also been biogas projects, but the farmers do not accept it, this is not a technical problem at all, the key is a problem of investment, maintenance and feeding."

Investment and maintenance require money, especially when it is just built, farmers are not willing to pay this first money, and they will be alive and well.

As for the subsequent investment, I don't want to think about it, due to various reasons, the liquidity in the hands of farmers is not much; This digester is also like a factory, it needs to be fed, and the gas production of manure is the largest, but because the feed is too expensive, and each family raises too little livestock------ so this feeding is also quite a sad thing. ”

Wu Dapeng said: "I understand. If everyone raises funds to build one together, there is still a management problem, and besides, every household is far away, and gas supply is also a matter. If you dare to use it to generate electricity, it is unlikely to be approved, and I am afraid that you will not even be able to enter the power grid. The electric tiger certainly can't be easily conceded. ”

But in this time and space of the Great Song Dynasty, if they want to do it, it is too convenient, the pottery pipe is blocked with water glass, and then the valve is processed finely.

Professor Wang Defa's classes satisfied the students, because they were only popular science courses, and there were no exams.

When Professor Zhang Guoan started the class, the Song technician students realized that their salary was not easy to earn.

Professor Zhang Guoan asked them to learn Arabic numerals at first, and if they couldn't do this, then they couldn't learn mathematics.

After three days, everyone knew almost every Arabic numeral number, and the misrecognition rate was not too high.

Then he began to understand the unit of measurement on the wooden ruler, which was designed by Professor Zhang Guoan according to the tape measure he brought over, and he asked the carpenter to carefully follow the carving, and each person had a hand.

At that time, there were also wooden triangle plates and wooden hollow protractors made in the same batch, both of which Professor Zhang Guoan actually brought two standard parts in advance, and Professor Wang Defa understood at that time that the couple had really stayed here with an iron heart, not a temporary thought of patting their heads.

But Professor Wang Defa didn't say it, what's the use of saying it?

At that time, he said, "Let's make some compasses and simple vernier calipers...... You teach math, I'll do it myself, and I'll make a slide rule for them to use while their technical skills improve. ”

Professor Zhang Guoan glanced at Professor Wang Defa gratefully and did not say anything.

When Professor Zhang Guoan asked the Da Song technical students to convert, he found that their mathematics was very bad, not to mention the addition, subtraction, multiplication and division on the ten-digit number, even the calculation on the single digit was a problem.

"Bowe, how much is 5 plus 6?"

“…… Twelve! ”

"Zhang Depei, what can you say?"

“…… It's not like a ......."

"Then you two tell me, I borrowed five cents from you the day before yesterday, and I borrowed another six cents yesterday, how much wen do I have to pay you back today?"

At this time, the two said in unison: "Thirteen Wen! ”

“…… There is no interest. ”

"Of course it hasn't."

Well, if you want to really start learning technology, you still have to start with math.

In fact, it is not so desperate, Mei Lezhi and Wu Di's calculation ability is very good, when they fully master the small ninety-nine table and even the big ninety-nine table, they can even slowly add, subtract, multiply and divide ten digits, and what is even happier is that they can also take the initiative to help their classmates.

After a week, the students learned how to add, subtract, multiply, and divide the ten-digit numbers.

But the question of right and wrong, this can only be hehe, most of the people can pass.

All three of them are optimistic about this, and they can't be optimistic if they don't.

It is painful to learn to calculate numbers every day, but Zhang Guoan and his wife, who are not rich in teaching experience, have their own methods.

Professor Cheung managed to guide them to start their outward bound training.

There's nothing more appealing than not having to work, playing games, earning a monthly salary, and having good food.

During the Great Song Dynasty, whether it was the upper class or the lower class, they could play a lot of games.

If polo is too high-end game, such as hammerball, which is similar to golf, this is generally played by women and the elderly, and for example, feather shuttlecock, this is played by children.

There is also a bow, which can be played by all the members.

Professor Zhang Guoan looked at the ball and found that it was a soft volleyball similar to that side of the world.

Think about it, how much can most of the pig bubbles weigh? It's all slow to fly......

Professor Zhang Guoan designed the playground.

This ground is nailed into the ground with hemp rope and wooden stakes to form a rectangle of six meters by nine meters, and a net of hemp rope with a height of one and a half meters is set up in the middle.

The rules of the game are similar to the volleyball game in that world, where each side can only have six players each, and then the rim goes up to the net, but you can't touch the ball with your arms below the shoulder, and you can use all other parts to kick with your backhand.

The Song Dynasty technician students were happy, this plaything was a plaything they were familiar with, how to play, Professor Zhang Guoan asked Yalang Ma Yun to write it on paper, and then pasted it on the wall, but unfortunately, most of them were illiterate.

But Professor Zhang Guoan still asked Yalang Ma Yun to post it, and asked him to explain it to them repeatedly.

Professor Zhang Guoan observed them for many days, and roughly divided them into three teams according to their personality characteristics, and there was one more person, who was indeed shorter and would not participate for the time being.

Professor Zhang Guoan distributed clothes to them according to the agreement agreed in advance.

The cotton cloth in this time and space is still not cheap, but Professor Zhang Guoan didn't care, and all the cotton he bought was cotton.

The shoes are all hemp rope shoes and no socks.

Since they are so generous, then, the style is strange, and they can only accept it, what else do you choose for the white clothes?

Quiet measured their bodies separately, and then gave them paper patterns according to the data. That is, the various parts of the garment are cut out with paper and marked with a brush.

Then let the tailor cut the cotton cloth according to the paper pattern, so that it is not to be mixed up.

After the tailors had finished cutting in turn, Quiet began to take the lead in leading the tailors to sew carefully.

This time, she hired three tailors.

They were all fascinated by the sewing needles that Quiet had given them, which were far more delicate than they were used to, except that the eye of the needle was smaller, and it took a bit of work to sew the thread, but it could be sewn.

The cotton thread they used was thicker.

The jacket, after they sewed it according to the method taught by Jingjing, Jingjing took out some long wooden buttons, which Professor Zhang Guoan asked the carpenter to make, and it was not troublesome.

Quiet said: "This is the button, you see the other side of the clothes and open your eyes, right?" You can ...... like this."

After Quiet's demonstration, several tailors understood and learned the latch and keyhole.

Quietly said: "The quality of this cotton cloth is really bad, it's too loose......"

The tailor saw that the tall woman disliked cotton cloth badly, and thought to himself, this is the best cloth in Lin'an County......

Quiet is in the pants upper gear and deliberately go up slowly to let them follow.

Quiet said: "Look, this way there won't be 'butt jamming' in the future, hehe......"

The tailors are all inexplicable, what's so funny? Didn't you just tuck your trouser legs a little?

Quiet continued to lead them to sew underwear, and then the action was fast, after all, they were also professionals, and once they understood the approximation, they could keep up.

Quietly said: "You still have to have underwear to be hygienic......"

For the first time, the tailors sewed such tight, such small garments.

But when they sewed the second round, it was faster.

When all the clothes were sewn, Jing Jing looked at each one, after all, it was a hand needle, far less dense than the machine needle, but it was not bad, and the stitches were also considered dense.

The clothes and pants are loose, but this level is probably the most compact in Lin'an County.

After all the Da Song technician students were replaced, Professor Zhang Guoan looked at it and wanted to laugh, but now he is still a little tired of it.

Yalang Ma Yun always snickered.

Professor Zhang Guoan said: "What do you think of? Are they like little roosters wet in the rain? ”

Yalang Ma Yun was happy at this time and said: "Exactly, exactly!" ”