As for the Duke Rongguo's Mansion and the Marquis of Zhenbei's Mansion in the capital, the two Miss Mu, who were not punished and held accountable, and Miss Ning Er, tried their best to ask Song San out this year, with a sense of luck.

I always want to try again to see if I can kill Song San before the marriage. If I don't want to kill her, I have to find a way to destroy her reputation and let her break off the engagement on her own.

It's a pity that Mrs. Liang of the Song family only brings the eldest and second girls of the house to attend every time, but Song San is nowhere to be seen.

He planned to make her look embarrassed at her hair extensions ceremony, but waited until August to find out that Song San's hair extensions ceremony had actually been done secretly and had been completed long ago?

Song San, such a mysterious dragon, seems to be invisible. She has been missing for a whole year since the Lantern Festival. At the end of the year, she suddenly said that she had found a mine?!

This is simply, simply, simply unacceptable!

Ning Yueyao smashed a lot of things at home, but Li Zhao was very happy.

He knows it! The daughter-in-law he chose is a daughter-in-law who can dig mines! Which of your wives can dig mines?

Hahahahaha!

He was so proud.

Ning Yueyao said angrily at home: "Just wait, when something happens to her coal mine and someone dies, I'll see how long she can be proud of it!"

But Ning Yueyao would never wait for this opportunity.

After some discussions between Song Qingyue and Mr. Song, they decided to hand over the coal mine to the Ministry of Industry for mining. As for the profits from the coal mining, half of the profits will go to the state treasury!

For the remaining 50%, the married second sister and the eldest sister each get half a percent, and the eldest brother and second brother each get half a percent. As for Song Qingyue herself, she and her father Song Jianming will share the remaining 30% equally.

.

So in the end, Song Qingyue only took 15% of the coal mine income, and 85% of the income was given away in vain. Even the emperor lamented the magnanimity and courage of this Song San girl.

As expected, that boy Li Zhao doesn't fall in love with any girl casually. With such courage, there are not many female relatives in the capital.

In fact, it's not that Song Qingyue is arrogant, it's actually because she is timid. She always feels that at this critical moment, Li Zhao and herself are being stared at from all directions. There are too many people who want to find trouble. Even if she doesn't make a mistake, she bets one hundred and twenty guarantees.

Latiao, someone will create some trouble for her.

Mining is a very dangerous job. If someone deliberately wants to cause trouble, it is impossible to prevent it. They simply eliminate the possibility of making mistakes at the source, so they hand over the mine to the emperor to deal with it.

There are people in the Ministry of Industry who are skilled. If an accident occurs in the mine, it is also the problem of the Ministry of Industry.

She just lays at home and counts money.

The happiest thing in life is to just take money and not work. This is simply the realization of her life ideal in her previous life.

However, the coal mine was on her property after all, and her village also wanted to raise sheep, cows, and chickens, so she had someone build a wall with cement bricks to surround the construction site and prevent anyone from passing by casually.

Furthermore, in order for the miners to mine safely, she specially built a "safety miner's lamp".

Sometimes, there is flammable and explosive gas, that is, natural biogas, in the mine tunnels of some coal mines. The lighting in this era is all open flames. Workers hold oil lamps when going down the mine tunnels. If they encounter a certain concentration of biogas, it is easy to cause

An extremely tragic explosion.

In the 19th century, a British man invented a safety miner's lamp (David's lamp). The principle is to add a circle of iron wire or copper wire mesh around the periphery of an ordinary fuel lamp to facilitate heat conduction and dissipation, so that the overall temperature of the lamp is always low.

The ignition point of flammable gases such as methane.

In her previous life, she had seen this thing in the title of a question in a physics exercise book. Song Qingyue had always had an excellent memory for such weird knowledge points, and she would never forget it after reading it once.

Soon after, the Minister of Industry was very excited and brought this lamp that would not explode when exposed to biogas to the palace to show it to the emperor.

That day Li Sheng, Li Zhao, Li Hu and the other two grandsons of the emperor were all there.

The Chinese people's use of biogas and natural gas began in the Eastern Han Dynasty. In Zigong, Sichuan, there has been a tradition of boiling salt in fire wells since ancient times. Naturally, everyone knows the horror of biogas and natural gas, which are combustible gases that emerge from the ground.

Everyone was surprised to see with their own eyes that the lamp did not explode after being exposed to biogas.

Then a director from the Ministry of Industry explained the principle, and everyone suddenly understood it.

The emperor's eldest grandson, Li Sheng, said: "This thing has benefited so many miners! Grandpa Huang, the person who made the lamp should be rewarded heavily!"

Li Yan also smiled and said: "Yes, this lamp is really good."

"Who made this lamp? It deserves a reward! There are many rewards!" The emperor nodded in agreement.

The Minister of Industry raised his head slightly and glanced at Li Zhao, then lowered his eyes and bowed to report: "Your Majesty, this lamp is the drawing brought by Mr. Song Ge."

The emperor raised his eyebrows, looked back at Li Zhao, and asked, "Did that little girl playing in the mud do it again?"

Li Zhao hurriedly bowed and said, "My grandson doesn't know what to say to Grandpa Huang." He answered respectfully, and the corners of his mouth turned up unconsciously. Who else could have such a weirdo besides his own daughter-in-law?

"Go and call me Song Jianming." The emperor glanced at Eunuch Yin beside him.

Eunuch Yin immediately asked young Eunuch Deng to go to the cabinet and summon Mr. Song.

"Song Aiqing, is this lamp made by your mud-playing girl?" the emperor asked.

Song Jianming quickly replied: "It's that girl."

"Tsk, that girl of yours is really a weirdo!" The emperor twirled an imperial green jade bracelet in his hand.

Song Jianming smiled, but instead of being modest, he boasted and said, "That girl has loved reading miscellaneous books such as Mengxi Bi Tan and Qi Min Ya Shu since she was a child. She does have some talent for creation."

The emperor hummed twice and said with a smile: "This is much better than the self-heating lunch box last time. Song Aiqing, what do you think I can give that girl as a reward?"

At this time, Song Jianming knew that he had to refuse, and said with a smile: "They are all your Majesty's subjects. It is your duty to work for your Majesty and for the great Zhou Dynasty. She is a girl, she does not need any reward."

The emperor glanced at Li Zhao again and asked, "Zhao'er, your little wife is a good choice. What do you think you would like to reward her with?"

Li Zhao hurriedly said: "Grandpa, look what you said! My grandson has only seen Miss Song San as beautiful before. How could he know that she has such abilities? Even my grandson was surprised. As for what to reward, why not give it to me grandpa?"

Order some medicinal materials for her. She has caught the cold in recent years and is almost dead. She is still recovering in Zhuangzi."

"Ah, that seems to be the case." The emperor recalled that Song Jianming hurriedly rushed to the palace to seek help from the imperial doctor, and frowned and asked, "It's been so long and you still haven't recovered?"

Song Jianming said with a bitter face: "The third girl is less than one month old. She is already weak, and her illness is like a thread, so... it takes a long time."

"Then let the imperial doctor take a look again. Yin Hongwen, go to the warehouse and get more medicinal materials. This girl is so pitiful!"

All the princes and grandsons standing nearby started to cry. What kind of luck did Li Zhao have? He was so lucky! Why did he hit such a beautiful and capable girl? What on earth did he do?

What good thing could God be so kind to?

Only Li Jun didn't feel envious or jealous. He only frowned with worry. When he got back, he found Meng Wanfeng and asked her to go to Baoding again to see Miss Song San.

Meng Wanfeng frowned and looked at Li Yan's face with the word "Integrity" written on it, and sighed: "You, you are so serious! If you were a girl, you would think that the young master likes Song San!"

Li Zhu became anxious at Meng Wanfeng's words and blushed. He took Meng Wanfeng's hand and said, "Wan Feng, don't think like that. I, Li Zhu, swear to God, I have no feelings for Miss Song San."

I mean! You, you, you must not think nonsense! I, I..."

"Okay! I believe you. You're so anxious that you can't even speak!" Meng Wanfeng shook her head.

In early October, the farmers in Zhuangzi began to pickle pickled cabbage for the winter, while Song Qingyue was bored in the house every day studying how to desulfurize coal.

In order to understand the composition of the coal mines here, she had to start by making hydrochloric acid. In order to make hydrochloric acid, she also built a hand-operated generator and electrolyzed saturated brine to obtain caustic soda, hydrogen and chlorine.

When hydrogen and chlorine are mixed together and passed through a hot stone pipe, they will react to produce hydrogen chloride, which will become hydrochloric acid when passed into water.

The process of combining chlorine and hydrogen is very intense. The first time I did it, I used a glass tube, but it exploded, almost injuring Mo Yun.

Later, Song Qingyue improved the device and changed the glass tube to a stone tube made of granite. Finally, he successfully produced a mixture of hydrochloric acid and chlorine water with an unknown concentration. However, it was very choking. Song Qingyue only dared to do it outdoors.

The acidity of the hydrochloric acid produced in this way is relatively low, and it needs to be heated and condensed again to make a more concentrated hydrochloric acid. Then, the ground coal powder is soaked in higher concentration hydrochloric acid to obtain a brown solution, which smells like rotten egg gas.

It is certain that this gas is hydrogen sulfide.

But what exactly is sulfide? Song Qingyue stared at the bottle of brown liquid for a long time, and felt that the brown color seemed a little greenish. She wondered if it was a mixture of ferric chloride and ferrous chloride, so she simply tried it with a magnet.

It actually sucked out some small black powder.

It is almost certain that the sulfide contained in this coal mine must contain iron sulfide.

So in fact, as long as the excavated coal is ground and sucked with a magnet, partial desulfurization can be achieved?

Song Qingyue pondered this matter, and then directed the maids to pour the caustic soda produced during the production of hydrochloric acid into the oil, and stirred it vigorously to make soap.

This is the first time the maids have seen someone making soap like this. Nowadays, the process of making soap or soap is very complicated. How come the girl can make it in just two or three times?

The soap produced produces more lather than soap locust. It is really easy to use!

And what is that thing that turns concentrated salt water into caustic soda?

Facing the curious eyes of the maids, Song Qingyue scratched her head. For the first time, she didn't know how to explain this matter. It was all physics and chemistry knowledge in middle and high schools. It was not difficult to say, but it would take about an hour to explain it from the beginning.

A time that lasts for months.

And she herself is the kind of academic who thinks too fast and is not very good at explaining to others. I still remember when she was in junior high school, she often got points deducted during exams because she didn't write the whole process. She felt that many things were a bit awkward.

It just comes out, no need to write it down at all...
Chapter completed!