When Chen Mu placed a drawing drawing of the general structure of the microscope in his impression in front of Zhu Zai-chan, he heard Prince Zheng say that this was a bit difficult.

The so-called "is a bit difficult", which means that the prince needs to make a small calculation.

The big abacus is not good. Zhu Zai's big abacus is to go to one every nine, and it specifically calculates data related to the twelve average ratio.

During this process, Chen Mu discovered another small flaw in Prince Zheng, who judged others by himself.

Perhaps smart people have this problem. When the emperor in the Forbidden City was still young, Emperor Zhang Juzheng was always angry. It was obvious that he could tell at a glance. You are already five years old and can’t understand the books of sages?

Prince Zheng also roughly said this, for example, "Everyone knows that the world is perfect." In one sentence, most of the humans on the earth were expelled from humans.

But if we really want to talk about calculation, there is no difficulty in designing the entire process. In the end, the three of them always thought that the key to success or not was not their hands... in the hands of the craftsman who grind the lenses.

Who can do this?

Is there a glassesman in Changsheng?

Is there anyone who can polish the lens to a higher accuracy than glasses?

There is really.

The Changshenggang Daojun Temple is diagonally opposite the shop No. 17 Ersheng Street. The owner of the crystal glasses of Mingxinzhai Yufang, the master of the Dongyang Marshal's family craftsman, Xu Lu'an.

The jeweler apprentice from Nanjing came to the court. The imperial court established the Xuanfu Military Arts Bureau to collect corvee service. He replaced the master to work as a stonemason in Xuanfu and became a craftsman. He never went back again.

In recent years, I have processed a large number of Sulu pearls, Luzon gold, and lion national gems, and have accumulated a good craft until I followed Chen Mu to Dadongyang and was ordered to open a No. 17 store.

At first, he purchased jade and jade from the indigenous people. Later, when there were too many jade materials, he processed them again. For this reason, Changsheng set up a jade factory in the suburbs of the city. Now there are hundreds of workers doing this. Later, Changsheng burned glass and made more glasses.

He not only ground glass eyes, but also grinds jade glasses. Not only does he polish glasses that can make myopia and presbyopia clearly see, but also wear glasses that are abnormal. For example... Mingxinzhai sells glasses that can see four suns after wearing them.

But Xu Luan didn't know the principle that glass and jade could be polished into such a shape, but he knew it was useful, so he specially recruited twelve people with different degrees of myopia, and they tried it in the production.

The production efficiency is not high. Even if he has a factory with hundreds of people, it is enough for him to sell it and make a profit. The best they sell is the jade flat mirror that can see the four suns.

The glasses business is limited after all, how many people can do the same thing? A glass glasses sell three thousand treasures and it will be a big deal. Even jade can only be sold for six or seven thousand. The real money is to make most of the jade decorations that are useless.

The indigenous people had a tradition of carrying jade. In the past, there were only sacrifices, and the leaders could possess many jade decorations. Now, jadeware is circulating on the market. Although it is smaller, the jade craftsmen of the Ming Dynasty were more skilled. Even the indigenous jade maids who had been trained by them could polish, carve, and polish extremely exquisite ornaments.

It may be a small jade pendant, a jade hairpin, or even a jade necklace or bracelet. Even if most people only have one or two thousand Tongbao per month, they can buy back a small piece of jewelry at a high price of 6,700 or even tens of thousands of Tongbao.

Therefore, the business of the No. 17 store has always been very good. Even if the large-scale jade sales ended long ago, he could still make the entire factory operate in an excellent financial environment by buying low and selling high, and carefully making it. He even paid 50 to one million Tongbao money and taxes to the Dongyang Military Palace every month.

But this was a waste of time for Xu Luan. Although he was just a craftsman, he also hoped to do something big - let future generations know that Xu Luan had come to this world.

He had been wondering what he could do on this land. Although he opened the first jade shop in Asia for the Dongyang Military Palace, took over the orders for forty telescopes of the Dongyang Military Bureau's ever-winning Military Bureau, and carved his name well on the wooden handle and brass engraved his name on the telescope's wooden handle, this was not the kind of big thing he wanted to do.

Until Chen Mu came to him again.

"The Grandmaster wants two convex mirrors and one concave piece?"

This is too simple for Xu Luan. They have the raw materials for making mirrors and grinding materials. The most important thing is to have the mold for making lenses - their processes are much more advanced than ordinary people imagine.

"Yes, these three pieces are one set, and you can make a few more sets, different sizes and different arcs. When you are done, I will send someone to the timber farm to make the shell." Chen Mu thought this was a very difficult task and asked: "If you hold on, can you make it in ten days? This is very important."

He had already planned to make props, get some oranges, make them grow hair, form a microscope with the clearest lens, and let Zhu Zaiyou and Chen Shigong summarize the clear rules of the lenses with Xu Luan here to facilitate craftsmen to polish better lenses.

But unexpectedly, his words made Xu Luan stunned: "Ten days?"

"The concave mirror can be made today, and the next twelve types are almost the same in ten days, but the convex mirror needs to be made into a mold immediately and it will take until tomorrow." Xu Luan said as he had already given instructions to the craftsmen, and then said to Chen Mu: "Why don't the Grand Marshal go with the villain to see how to make lenses."

Chen Mu nodded, took out his pocket watch and looked at the time, nodded in response.

Chen Shigong still doesn't understand what Chen Mu wants to do these things. He carries a magnifying glass that can clear the blood vessels and muscle textures during dissection, but that is simply impossible to achieve what Chen Mu said - to see what the enemy fighting with him looks like.

The magnifying glass worth mentioning is not an imported product. It was called "Huoqi" in the Han Dynasty and perhaps earlier times, and it was the first to use fire.

The road from Mingxinzhai No. 17 to Jade Factory is not far away. There are many factories in the suburbs of the city. Just as the time to transport goods in the evening, there are tow trucks driving Spanish donkeys everywhere along the way. The coachman is wearing Jinghai suits and short robes of various colors and whips, and the carriages are carrying various cargoes commonly used by Changsheng.

The most common items are wood, charcoal and coal, arrow shafts, arrow clusters, hemp ropes, sacks, and iron pots.

On the way, Xu Luan introduced to three people who were separated from the daily lives of the people that Changsheng would open a large market in two days, and merchants were busy preparing for this.

From afar, they could see the white smoke coming out of the large chimney of the jade factory.

The factory in Mingxinzhai is very quiet. Although dozens of craftsmen gathered, everyone is doing what they do. Most people quietly polish jade, without any sound except for the sound of stepping on the iron wheel.

However, in the kiln where the glass was burned, two supervisors were scolded by Xu Luan for chatting in the factory.

They waited for about a moment, and a craftsman walked out of the kiln with a thick glove and carried an iron rod. The other side of the iron rod was rolled with red glass pieces, and at this time he softened and wanted to drip down.

Xu Luan wiped the sweat from his forehead due to the high temperature of the factory and said to Chen Mu: "Master, it's begun."
Chapter completed!