"Arithmetic is indispensable in the world, both public and private."
"Arithmetic includes degrees, square roots, and geometry. Xu Gongguang began to write "Elements of Geometry" and made our country and people learn it and learn about it. For example, measuring acres, building bridges, and operating artillery can all benefit a lot. Today , we began to study the first volume of "Elements of Geometry", which is about triangles and has a total of forty-eight questions."
At around 1 o'clock that day, Gu Shouqian came to deliver pens, ink, paper and inkstones to Shoukuan School on behalf of Mrs. Miao. He passed by the classroom where the teacher was teaching arithmetic.
He stood and listened for a while. When he turned around, he saw Wang Yuesheng and Zhang Dai coming side by side.
Zhang Dai bowed his hands in salute and asked: "The Traveling Immortal also likes geometry in arithmetic?"
Gu Shouqian said: "I was not very interested at first, but this year I was ordered by Mr. Sun to draw some French drawings of guns and artillery, and then I realized that the cannon must be measured with a gun gauge plate, otherwise the iron bullet will miss the target. And this method also It’s related to geometry, so I’ll listen to it.”
Wang Yuesheng added with a smile: "Master Gu's brushwork is amazing, and he can simplify the complex. Not only the artilleryman who has studied geometry, but also the craftsmen and I can understand the French diagrams at least seventy-eight points."
Wang Yuesheng's praise was definitely not meant as a courtesy.
At the beginning of the year, after Zheng Haizhu went to Chongming to reclaim wasteland, Miao Ruiyun told Wang Yuesheng to write down and graphically describe the casting and operation of firearms as soon as possible, form a booklet like the Ministry of Industry's construction code, and hand it over to Liu Shimin in the north and Zheng Yi in the south.
Wang Yuesheng suddenly thought and suggested that Mr. Gu, the grandson of Grandma, was a ready-made master of painting and calligraphy. Sun Yuanhua was also inspired by his teacher Xu Guangqi to write a book about the smelting and operation of artillery like "Elements of Geometry". . It would be better if Gu Shou was allowed to sneak into the artillery factory and assist Sun Yuan in writing books without arousing suspicion, rather than wandering around the factories and workshops as a woman who was supposed to be in charge of people and money.
Now that two months have passed, Gu Shouqian's progress is indeed not slow. Wang Yuesheng only waited for him to finish all the manuscripts, and then told Sun Yuanhua and Zheng Haizhu that the matter involved military aircraft, and that he would personally publish it and take the opportunity to publish a few copies.
At this moment, Gu Shouqian didn't know that there was such a deep meaning hidden in Miss Wang's bright smile. He felt that although the beautiful couple in front of him could not stay together openly and openly in the mansion, they were a couple who were deeply in love, so how could they live together day and night? Wonderful place.
Only Zhang Dai took the initiative to invite: "Brother Luxian, I have found some ancient fir boards from Shanyin. Brother, would you like to come and have a look and give me some advice?"
The qin is made of wood, with the top made of fir and the base made of catalpa. Gu Shouqian, a scholar-gentleman, was not inferior to Zhang and Wang in his appreciation of the piano, so he was happy to go with him.
In the courtyard of Qinfang, the monk Yonghai who stayed at Shoukuan School to teach Japanese was happily stroking some cedar boards.
After living in Daming for almost a year, Yonghai's Chinese improved by leaps and bounds, and he was able to express compliments to Zhang Dai fluently.
Gu Shouqian looked at the growth rings on the wooden board and listened to Zhang Dai and Yonghai's narration.
Although Zhang Dai speaks modestly and calmly, when he talks about the particularities of sound transmission on the piano board, he always starts with "Mr. Wang said it", which shows that he regards Wang Yuesheng's preferences as a top priority.
Gu Shouqian listened and had an idea in his mind.
Returning to Wenzhe Garden, he called the boy: "Go to the shack near Jiuliwan, Sijing, and find Blacksmith Du who sent me back that day. Take a look at his shop. If it is open, ask him to make fifty logs. The cotton seeds are milled and then hundreds of needle blanks are made.”
Gu's mother, Mrs. Lu, was pruning hibiscus at the side. She turned around and asked her son with a hint of joy as she searched, "Are you going to send some farm tools to Miss Ximeng and Miss Zheng?"
Gu Shouqian rarely showed a knowing smile in many days, nodded and said: "I heard Ximeng said that iron rollers are better than wooden rollers for rolling kapok. Miss Zheng has to support many refugees, and money will be tight in recent years, so we will give her a gift A few iron rollers. As for the needle blanks, I heard a unique secret method of frying needles from Atai, and I was about to try it."
What Gu Shouqian called "needle frying" was a necessary step for people at that time to make embroidery needles.
After the iron wire is cut off and the needle holes are cut out, it is fried in a pot over low heat, and then steamed with pine wood chips mixed with fine soil. Different embroidery studios use different cooking and steaming methods and materials, all of which follow the embroiderers' habits of pinching and applying needles.
His mother, Mrs. Lu, heard that her son wanted to make needlework for her daughter-in-law, and her face was full of longing. She couldn't help but feel happy. She slowly echoed: "Ximeng is the most picky about needles. If you make a suitable set of embroidery needles for her, she will definitely know how to do it." Happy. Ah Qian, my mother feels that Ximeng has a good eye for people. That Yin family loves to be in the limelight and makes friends with all kinds of cats and dogs. The few evil businessmen attracted this time are just like bandits and robbers. "
Gu Shouqian listened quietly.
The day after the attack, he went to Songjiang Mansion to complain. Huang Zunsu personally went to the Shandong Chamber of Commerce to pick up the man, but the three evil businessmen had already escaped. Gu Shouqian gave up because of the face of his teacher Dong Qichang, but in his heart he had the same idea as his mother. Han Ximeng did not want to associate with Yin, which now seems to make sense.
I heard Mrs. Lu calling to the boy who was going to do something, and then asked Gu Shouqian: "Does the blacksmith who saved you have any female relatives at home? I will give him a few sets of clothes and handkerchiefs and take them with him."
Gu Shouqian said: "For foreign craftsmen, even if they have a good heart, I am afraid that the quality of the people around them will be mixed. Mother, my family does not need to act like relatives. My son has given him some money to earn, even if he has thanked him for his kindness. It’s a saving grace.”
Lu thought it made sense, so she gave up.
More than half an hour later, the boy came back and reported to Gu Shouqian: "Master, the furnace at Blacksmith Du's place is already burning. I will give him the deposit. He is very happy."
Gu Shouqian was writing notes on the pictures of hawks, large blunderbuss, four-pound cannons and other firearms. He didn't even raise his head and said lightly, "I got it."
…
Chongming Island, Zhengjiazhuang.
Three months later, the second batch of about fifty Liao residents was sent over by Xu Sanyong on a cargo ship from Haoming Trading Company.
Along with Xu San on this trip, there was also a young mother - Aya.
This member of the Yehe tribe who had been abused by both the Jurchens and the Han in Jianzhou was initially taken in by Zheng Haizhu, and followed her on a trip to Hetuala to participate in espionage training. It was as if he had been given a new life.
After Aya gave birth to her child in Liaoyang and rested for a year, Wu Bondang arranged for her to assist Mu Zaohua at the Yanzhou Intelligence Station.
This time, Aya took her children with her and boarded Xu San's ship from Dengzhou to Chongming Island to report to Zheng Haizhu the situation in the Wangfu Coal Mine and to pay the dividends from the coal mine shares distributed by His Highness Zhu Yi to Zheng Haizhu. .
Zheng Haizhu specifically asked about the pumping of water from Yanzhou Coal Mine.
After all, the invention of the spinning jenny and the steam engine were actions that travelers who came to the Age of Discovery would definitely think of.
The invention of the steam engine came from the need to pump water from coal mines.
Zheng Haizhu was not an engineer in his previous life, and he did not have the standard golden fingers for time travellers, such as the system where he could choose Watt's Q&A.
But it doesn’t matter. This is the late Ming Dynasty, an era with scientists such as Xu Guangqi and Song Yingxing. As long as she introduces ideas, the steam engine may be shaped like a multi-spindle spinning machine by the smart indigenous people.
After listening to Aya's report on the coal mine, Zheng Haizhu looked at the hoarder on duty in the military library opposite, squinted and said: "Aya, you stay in Zhuangzi for a few months, help me pay attention to a hoarder, take a look at him Is there something fishy?"
