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What makes Mao Geng happy is that with cement is really effective, after adding about 2o% cement to the gypsum, the strength and wear resistance of the chalk produced are obviously much higher, and it can be roughly called real chalk.

On this day, with the brand-new blackboard sent by Mr. He, Mao Geng officially began to teach with the help of blackboard and chalk, and not only Wang Yunzhi, the little brother of the Wang family, sat in the audience, but also the three sisters of the Wang family and Wen Yuan also sat in the audience to listen to the lecture.

The classroom used to teach in Baixi official school is not large, far from being like in later generations, a classroom can accommodate fifty or sixty students at every turn, and the "classroom" here can accommodate twenty students at most, so the blackboard designed by Mao Geng is not large, but it is only about half of the blackboard in later generations. Considering that in this era, there is no need for long board books, and there is no need to list long formulas and long equations, such a blackboard is enough to use.

Today, I still talk about geometry, Mao Geng taught the little brother of the Wang family, and used the Arabic alphabet and the English alphabet from the beginning, because Mao Geng was not interested in understanding how arithmetic was taught in the Song Dynasty. It turned out that teaching Wang Yunzhi on paper could only be one-on-one, but now with blackboard chalk, it would be a waste of resources to teach only one Wang Yunzhi, so after Wenyuan's mobilization, a few more students sat in the audience to cheer.

Mao Geng's calligraphy is not very good, but the chalk board book is top-notch, otherwise he would not have been selected to run a blackboard newspaper in his previous life.

As soon as he returned to his familiar atmosphere, Mao Geng had carefully prepared, and this public class was also very similar, and even Wang Qinqin in the audience wondered why Mao Geng was not that or that today.

Mr. Wang and Mr. Wang Er also came over one after another, looking in from the broken hole in the window, Mao Geng's strange horizontal writing no longer made them feel uncomfortable, but Mao Geng's technique of writing white characters on the blackboard surprised the two gentlemen.

After the two Mr. Wang left, Mr. He ran over again, also looked inside, and then left thoughtfully.

The last voyeur viewer didn't expect that it would be Mr. Kang's wife. Mrs. Kang looked at the window for a long time before walking away.

Mao Geng just felt that someone was looking outside the window, and guessed that it was the two gentlemen of the Wang family, which was not strange at all. Mao Geng decided to send some chalk to the Wang family, and the two gentlemen of the Wang family must not refuse to use convenient teaching methods!

Mao Geng glanced at Wang Qinyin's face many times, and noticed that Qin Yin was listening attentively, and there was a sense of guilt in his heart for no reason, as if there was something wrong with Qin Yin. Qin Yan listened very carefully, and seemed to be very interested in geometry. Wang Qinqin is quite honest today, and it may be fresh to listen to a class occasionally, and with Wen Yuan by her side, it is rare for this unruly woman to follow the rules once.

Mao Geng's lecture today is very smooth, geometry, it's really too basic, and Mao Geng also specially prepared a class, so a qiē looks almost perfect, the lecture is coherent, the idiom "that" only appears a few times in the lecture, and the board book can be said to be impeccable, this open class is generally not bad, Mao Geng found the feeling of being a teacher. If Su Zhiyan also sat in the audience and listened to her rigorous and fluent speech, well, I don't know if she would have admired herself.

After a class, Mao Geng felt a sense of accomplishment, as for how many supernumerary students except Wang Yunzhi listened, Mao Geng didn't care about it.

After class, Mao Geng asked Wen Yuan to bring fifty pieces of chalk and send them to the Wang family to the two Wang family gentlemen. Of course, Wen Yuan is happy to go, and it is always a good opportunity to have a watch at Mr. Wang's place.

It can be seen that the three sisters of the Wang family are also a little excited in the past two days, of course, this is due to Wen Yuanxian's "mud to stone", at the request of Wang Qinqin, Wen Yuan also did not hesitate to demonstrate a "mud into stone" on the spot, which made the three sisters and Wang Yunzhi feel very magical.

After the successful cement test burning, Mao Geng had a new trouble, that is, how to industrialize the laboratory results. This is not a difficult thing in the future, if the technical side is short of money, you can find venture capital, or go to the high-tech fair to find cooperative businesses, in short, as long as you have a good project in hand, you are poor in money, but the market is not bad money, money will come to you.

It is a pity that venture capital in the Song Dynasty has not yet risen, and I am afraid that it will have to wait for itself to advocate the trend. It is said that the government-run economy of the Song Dynasty was very popular, and even the wine was sold by the government, but Mao Geng felt that it was better not to touch the official for the time being. Looking at Baixi Town, if you want to find a partner to invest in cement, the Su family should be a good choice. In fact, the Dun family is okay, but when he thinks of the headache of the third sister of the Dun family, Mao Geng shook his head.

In Mao Geng's plan, the three projects of cement, pendulum clock, and glass can be carried out first, and here in Xinhua, the conditions for doing these three projects are very mature. Relatively speaking, cement must be on the scale, no scale can not talk about anything, imagine that a day to produce dozens of catties of hundreds of catties of cement, the cost will be high! In the era of abundant supply of cheap lime, there is obviously a big question mark over whether the market will accept expensive cement. The positioning of cement can only go to the small profit and quick turnover model with a large volume and wide area, and you can't make cement a luxury product!

The clock and glass, but can be positioned according to luxury goods first, at the beginning may as well be produced in small quantities, the price can be set high, how can it be justified without seeking a little profit!

The design of the clock is almost over, and after returning from Youxi, Mao Geng, who was greatly stimulated, decided to mention it comprehensively. Just when the cement came out, Mao Geng modified the trial production plan and decided to cast the components himself. For example, the escape wheel, Mao Geng plans to use copper to cast, and the mold for casting the escape wheel is mixed with a small amount of cement to make zuò, and the cavity is carved out on the plaster by carving, and then the copper water can be poured to form. The hook can also be concocted in the same way. As long as the escapement test passes, the clock is actually done. The escapement may fail a few times, but it will eventually break through, and Mao Geng feels that through drawing and calculation, he is theoretically quite sure.

Firing glass is of course more difficult than calcining cement, but it's not much more difficult. Found quartzite, the matter is half the success, there is no soda ash, plant ash is also alkali, the same can also be used to fire glass.

It is also worth trying the tea seed oil deep processing project, well, that is, to remove the color and taste. It's best to find sepiolite, but if not, use bamboo charcoal to adsorb, but what will happen to the taste after adsorption, you have to try it to know. If successful, it is also a way to make money.

Throughout the ages, until later generations, a man had to stand on his own feet in order to earn respect, or else he would be reduced to a vassal. Think about it, even if you walk with Su Zhiyan, as soon as people open their mouths, this person is stained with the glory of the Su family, and there is nothing wonderful about life.

Mao Geng thought a little distractedly, and didn't watch out for a figure suddenly appearing in front of him, and this person didn't speak out until he was in front of him:

"Brother Mao, the old woman has a few words I want to tell you."

Mao Geng saw that this person was Mr. Kang's wife, although these two people were both in Baixi official school, they really didn't have any sense of existence, and almost everyone ignored their existence.

Mao Geng's politeness to the elders is not bad:

"Senior, please speak."

Mrs. Nakang heard Mao Geng call her senior, which was unprecedented, so she smiled and said:

"When I saw Little Brother Mao, the old body thought of Kang Lang when he was young, oh, that is, Mr. Kang when he was young."

Mao Geng sighed, and said in his heart that this Mrs. Kang is also a person with a story.

Sure enough, Mrs. Nakang continued:

"Speaking of the past, it doesn't hurt to talk about it, the old surname is Fu, she is a woman of the Yao family, the ancestors of the Fu family and the Dun family back then, they were all the right-hand men of the lord Su Gan, speaking of which, I am afraid that the Fu family is more beautiful than the Dun family. When I was young, I fell in love with Mr. Kang Lang here, just like the third sister of the Dun family now, and at that time, both the Fu family and the Kang family strongly opposed this family business, and in the end it couldn't stop me and Kang Lang from coming together. ”

It turns out that this mother-in-law of the Fujia family actually had such a touching emotional experience when she was young, and history often has striking similarities, and today's daughter of the Dun family is also affectionate to Wen Yuan.

The old lady sighed and said:

"I've lived my whole life with Kang Lang, and I have nothing to regret. However, my father has never recognized me since I followed Kang Lang, and I feel a little sorry for my parents when I am old. It's just that they have long since passed away, and they have no chance to make up for it! I also know that they actually remember me too. ”

Mao Geng immediately guessed:

"Presumably, my mother-in-law must have been very beautiful when she was young."

Hearing Mao Geng's words, the already gloomy expression of the mother-in-law suddenly brightened, and she said proudly:

"Of course."

Then he turned to say:

"I'm not coming to you to tell you about these old things. I see that you are quite talented, and everything you do has your reason, and I want to ask you to help your family today. Alas! If it continues like this, I am afraid that it will not take many years before it will be completely defeated. ”

Mao Geng couldn't imagine that this mother-in-law had other plans, and she was just deliberately playing the sad card in front of her. The TV dramas of later generations are no longer good, and the most dangerous people are often hidden by your side, and you are unaware. I can't imagine that this old lady who is ignored on weekdays is staring at her every move, if she hadn't peeped and pondered herself all day long, how could she come to the conclusion that "everything she does is reasonable"! This old lady also made up her own idea, and her scheming is very deep!

The mother-in-law then smiled and said:

"I don't want you to help in vain, Brother Mao, don't worry, I'll give you back. I saw that the third sister of the Dun family was infatuated with Brother Wen, in fact, the old body could help a group of Brother Wen. Do you know that the Yao family has a medicinal bath, which is to help practice, Brother Wen'er is thin, if he uses a medicinal bath, and then the sixth brother of the old body guides him, he may be able to practice as soon as possible. ”

As soon as Mao Geng heard about the Yao family's medicinal bath, this is about a kind of therapy used for detoxification, and the Yao family is about to use this medicinal bath to deal with the miasma in the mountains, as for being able to strengthen muscles and bones and help practice, this seems to be a saying only in martial arts novels, I can't imagine that the Yao family really has such a method! - At least that's what people think they do! Still, there's something interesting about it.

Mao Geng thought to himself, this world is originally an exchange of all kinds of interests, and it is beyond reproach to help her mother-in-law do this, but I don't know what the help in her mouth refers to, whether she wants to use the Yao family's medicinal bath and guidance and practice to exchange her cement secret. So he asked:

"How can seniors help support their families?"

見女 says:

"I once heard Brother Wen say, saying that you can help Su Jiaqing to become rich in Shaozhou, I look at what you do, you should indeed have such a talent, the white pen written on the blackboard and the powder that can turn into stones, this is all seen by the old body, and the old body also sighs It's amazing. Saying that you have that ability, I can't help but believe it! However, if you help the Su family, it is the icing on the cake, and if you help the family, it is a charcoal in the snow. The conditions for helping the family are very easy to say, except for offering the Yao family medicinal bath and instructing you in kung fu, helping the family has always been not a monopoly of interests. Whoever takes advantage of you, how to divide the profit is negotiable. Although the Fu family is broken, there is still some foundation in Xinhua here, and the money and staff can still be deployed for the time being, although it is not as good as the Su family, Brother Mao does not have to worry about not being able to support the family. ”

Mao Gengxin said that this mother-in-law turned out to be quite atmospheric, but he underestimated her. It's just that Wen Yuan's mouth can't hide anything, it must have been blown out when he bragged with Qinqin Na Nizi, and even the mother-in-law heard it, what a bastard. However, this mother-in-law looks old, but in fact, her eyes and ears are very bright! You'll have to be careful in the future.

However, it seems that this mother-in-law does not seem to have any malice, so she replied:

"Let Xiao Ke think about it, maybe I can help some."

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