Sweet Garden Bliss

Let's say that Dean Ma got such a wonderful plan to make money, so he returned to the academy happily, then rolled up his sleeves and prepared to do something big.

The blackboard is easy to say, just ask a carpenter to hoop a few flat wooden boards and stand them on the brackets, and then paint them with black paint to ensure that the princess is satisfied.

It's just that the chalk is a bit troublesome to make. Fortunately, Ah Yuan had worked around in the previous life, and also drank lime in a simple chalk factory, so he can know the approximate ratio.

The main raw materials for making chalk are calcium carbonate and calcined gypsum. It is said that the reason why chalk is easy to break is that it is simply made of calcined gypsum and water without adding calcium carbonate.

It's a pity that Ah Yuan is half a bottle of vinegar. The chalk factory has ready-made raw materials purchased. You only need to prepare four parts of calcium carbonate, eight parts of calcined gypsum, and ten parts of water. The preparation method is to mix calcium carbonate and calcined gypsum first. , add water and mix thoroughly to make a thin slurry, then quickly pour it into the holes of the metal model pre-coated with oil, and after about ten minutes or half an hour, it will all solidify, then the model can be disassembled, taken out and dried in the sun.

When I came to the Great Song Dynasty, Ayuan really didn’t know how to extract calcium carbonate, so I could only explain the principle of burning gypsum. Burning gypsum is plaster of paris, which is to fry the gypsum powder in an iron pan. When the temperature is high, the gypsum powder will appear like water waves, indicating that it has been fried.

At this time, take the pot and mix the plaster of paris and limestone powder at a ratio of 6:4, then mix it with an equal amount of water and put it into the mold. After about 6 minutes, it can be taken out of the mold and dried.However, when entering the mold, it should be noted that each piece of chalk should be full and free of air bubbles. If you want to improve the quality of the chalk, you can use the fried gypsum after sieving.If the water is adjusted, it must be put into the mold immediately to avoid solidification and waste.

Dean Ma is also ignorant. Fortunately, there are many masters in the academy who are willing to use their brains to think about things. After hearing the instigation of the dean, they immediately prepared lime powder plaster, hired someone to make a mold, and hurriedly tested it. .

"You said, why didn't we think of it? If you write the content of the lecture on the blackboard and teach it to the students at any time, it will be much better than sitting there and just preaching."

Dean Ma shook his head and sighed with emotion to his master, and made up his mind, as long as it is feasible after the experiment.Immediately, a blackboard was installed in each dormitory. It doesn’t matter if the blackboard eraser can’t be made, you can use it with a rag first, and the teachers can use it over and over again.

The reason why I gave up making blackboard erasers is because when I heard what the princess explained, I had to tie them up with short, hard pig hairs.How can it be fixed if it is stuffed into a wooden board full of small round holes?The master in the academy, it's not good to go to class with all hands clutching loose pig hair...

In fact, it is a pity that he gave up. Many things are difficult to think about, but relatively easy to do. The brush used by scholars.Isn't it just to tie up the hair and stuff it into the pen holder?The method is correct, and it will not fall out easily.

Princess Furui had no choice but to leave such a "difficult" business to herself.When sketching the drawings, I also added the prototype of the toothbrush by the way, and handed it over to Zhang Dashan for laying out.

It’s really embarrassing for Ah Yuan, who has lived for two lifetimes. She has been nervous and tense for many years in Song Dynasty, but she still keeps the original record of rinsing her mouth and brushing her teeth with a wicker stick dipped in green salt. The heartless princess is too lazy to innovate!

but.Toothbrushes made of pitch-black pig hair and bristles are hard to chew, right?Zhang Dashan also knew to find a substitute as much as possible.At the very least, it should be white, bright, beautiful, hard enough and fine enough...

Later, Zhang Dashan, who had adapted to work part-time as a housekeeper for the princess, got inspiration from toothbrushes and blackboard erasers, and created a shoe brush with a shape similar to a toothbrush and a size similar to a blackboard eraser. And welcome, because this shoe brush is really easy to use. When I used to brush my shoes, I had to stick my fingers in and scratch them to clean them, not to mention how inconvenient it is.

It's not like now, it's not a problem to use a shoe brush to turn and roll in the cloth shoes to clean it easily.

Naturally, the business of the princess mansion is sure to make a profit, and there is another processing factory in Zhuyang County, and the products sell well all over the Song Dynasty.

These are all things to say. Five days later, the "Xinxin Academy" in Zhuyang County ushered in the first special "Princess Princess Lecture".

After five days of preparation, the chalk production of "Xinxin Academy" was finally barely qualified, and the blackboards were not old or young, standing in a long row on the ground.

But why are there so many people here?In addition to the academy's own masters and students who couldn't be kicked out, why were there so many bystanders from the invited teachers and students from other schools?All of them showed eagerness on their faces, and refused to go out even if they took the sticks to push the door...

It's as if a famous movie star in the previous life is going to participate in an event, surrounded by a sea of ​​people on three floors inside and three floors outside, it's not an ordinary spectacle, it's quite a spectacle!

The protagonist of "Spectacular", Princess Furui, was immediately moved.

All my life—no!I have never received such a warm welcome in two lifetimes!The little heart really couldn't stand it, it was beating wildly, wishing it could jump out warmly immediately...

Dean Ma and County Magistrate Hu are leading the way in front of them, and their majestic "big guards" are on the left, right and behind. At this moment, all of them have red faces and tight chests, protecting the princess from being overwhelmed. Enthusiastic impact, while proudly raising his chin proudly.

Afterwards, the guard Zhan Zhaozhan followed the three boys together with Zhang Dashan. Song Haohao did not act as a "follower". When drawing a sketch of a hairpin at home, it must be beautiful.

In the right hand of "Xie Xing", there was a big aluminum speaker. This thing looked strange and was so big that the young man was a little embarrassed to hold it to others.

Ah Yuan is addicted to being a celebrity, she waved her hands and smiled, if it wasn't for the tension of being in a different world in her mind, she would have almost stretched out her hand to send a "blow kiss"...

"Next time there is such an event, um - let them prepare for the red carpet in advance, so that it will be more stylish when stepping on it..." No one knows, Princess Furui, who is smiling like a flower, is thinking What kind of mess is going around!

What she is preparing today is a "outfit" with vermilion as the main tone, simple cutting and sewing, set off by the embroidery of flowers and plants in the same color, it will not dazzle people's eyes, but it can tell a kind of low-key luxury .

There is still a neat bun on the head, a silver hairpin inlaid with precious stones, fine silver chains hanging from the branches, three very small colorless gem stars, occasionally, with the refraction of the sun color flow.

The light makeup I painted by myself did not conceal any secrets at all. The skills of makeup in the beauty salon in the previous life were all dedicated to one face. No matter what expression there was, there was only the word "beauty", especially when smiling, the eyebrows turned and looked around, it can be called thrilling.

"Princess—Princess!—" The voices came and went.

The princess, who was too beautiful, finally passed through the siege and walked to the table that had been packed in advance. Dean Ma and Magistrate Hu sat on both sides, highlighting the beauty and dignity of a little red flower among the green bushes.

Ah Yuan didn't sit down, reached out to take the loudspeaker from "Evil Star", held it in front of his chest and said, "Thank you for coming to listen to my lecture...".

This loudspeaker is still a rare thing, and it has not been spread to the capital city yet, and the loud noise made many people jump.

"The princess's voice is really high!"

"What kind of monster is this? It covers most of the princess's face, so I can't see anything!"

The crowd was a little chaotic, which was normal, and it was always like this for big names who looked like celebrities to appear on stage.

Ah Yuan's voice hovered in the middle of the academy: "Students who are close, please sit down, so that friends who will come later can see and hear...".

There is no one to preside over discipline, and the princess made such a call, and it was really "crash--" and sat down in a large area, which was quite regular. The students were all in front no matter how young they were, and the masters sat behind the students. The audience who came here automatically stood at the back and listened.

With so many people gathered here, they suddenly quieted down for a moment, looking at A Yuan with bright and clear eyes, as if looking into the depths of her heart.

"Today, I want to start with the perimeter of several figures and extend to the concept of area. This is not a course I prepared in advance, but on the way here, I saw a lot of puddles and ditches. It is full of rainwater. This autumn, the rainwater has treated us Zhuyang County too well. Even though we already feel that the rainwater is enough and too extravagant, God still continues to give it away. I want to ask, who knows, what should we do? ?”

Laughter broke out in the crowd, because they thought the princess' tone was very cheerful.As for human beings, what should we do if we encounter natural disasters?What else can I do?

"Princess, God won't listen to us. If the rain continues to flood our homes, we will have to flee famine and wait for the rain to subside before coming back!" This is what the farmer standing in the last row shouted. I have been to school, and I am also interested in the issue of "administrators release water". I heard that there is a lecture given by the princess in "Xinxin Academy", so I also came to listen.

"What you said makes sense, but with so many of us and so many smart minds, can't we think of a way to fight against God? It's a drought, we know to take the river to irrigate the land, and it's raining continuously, we're sure It can be solved, right?"

Ah Yuan no longer waited for the answer she expected. The Song Dynasty had a lot of experience in fighting disasters, but it just didn't set a precedent for digging a reservoir to store water. She felt that she had an obligation to make this simple solution available at this moment.

"We always suffer from drought in spring, chanting the allusion of 'spring rain is as expensive as oil', so why not dig a large-capacity reservoir in the season of abundant rain, save the rainwater, and wait for next spring to solve the drought? ? The course on perimeter and area that I am going to teach today is to prepare for what kind of reservoir we will dig in Zhuyang County and how big it will be later... ". (To be continued. If you like this work, you are welcome to vote for recommendations and monthly tickets. Your support is my biggest motivation.)

ps: Thanks to Xuege 1972 and soi for the pink tickets, and thanks to aadg for the tip!

Recommend a friend's book: "Nongmen Shrewd Wife" Author: Ruo Lan

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