ps: If you want to hear more of your voices and receive more of your opinions, search for the WeChat public account "qdread" now and pay attention to it to give more support to "The Idle King of the Northern Song Dynasty"! Although Cao Yan knew that it was impossible for Zhao Yan to make glass, they finally agreed to Zhao Yan's conditions, as long as Zhao Yan came up with the manufacturing method of glass mirrors, then thirty percent of Daomen's income in glass mirrors in the future would be owned by Zhao Yan, which also made Zhao Yan very satisfied, and wrote out the manufacturing method of glass mirrors on the spot.

In fact, the method of manufacturing glass mirrors is mainly chemical silver plating, but unfortunately it requires silver nitrate, and Zhao Yan can't find it at all, so he can only use another primitive method, that is, the method of pasting tin foil, and then pour mercury between the tin foil and the glass, after a period of silence, a part of the tin will be dissolved by mercury, and then attached to the glass, and then brush a layer of paint to prevent the mercury from falling.

Of course, the above method has a big disadvantage, that is, it is easy to produce bubbles when making mirrors, so that it cannot be made into large mirrors, and the Venetians in the past history used this method to make mirrors, and as a result, the larger the mirror, the more valuable it is, and even a book-sized mirror will be worth a fortune.

However, there are no shortcomings, as long as it can make mirrors, and any technology is imperfect when it first appears, and people need to use wisdom and time to improve little by little, so Cao Tong They got Zhao Yan's mirror manufacturing method, immediately like a treasure, a few people immediately to organize people to do it as quickly as possible, as long as the real yàn is successful, they will immediately establish a glass mirror workshop, you must know that they have made a lot of money by selling glassware before. If there is a glass mirror, it can definitely bring greater benefits to the door.

It is also worth mentioning that Daomen has opened a glass workshop near the capital, which is said to be very large-scale, with nearly 1,000 craftsmen alone. And they have already started to produce glass, and now the glass products that flow out of the city of Beijing come from there, and if the method of making mirrors is feasible, they will also build another mirror workshop near the glass workshop.

After solving the problem of glass mirrors, Zhao Yan listened to the skillful hand Liu introduce the manufacturing progress of the microscope. As well as the problems encountered and solutions, on the whole, this Da Song version of the microscope should still be feasible in theory, but now the sample has not been completed, and no one can guarantee how the effect is.

Zhao Yan spent an afternoon in the microscopic display. In addition to solving some problems in microscope manufacturing, he was also very interested in Cao Tong's expansion of the Taoist mythological system, because in his opinion, this was simply the background structure of the Daomen making up a mythological novel, and it also concentrated a large number of elites in the Daomen, so he wanted to see what kind of mythological system so many people's imagination would be concocted together.

However, it is a pity that although Zhao Yan is Cao Yan's grandson-in-law. And the relationship with Daomen is also very close, but unfortunately he is not a person from Daomen after all, according to the agreement between Cao Tong and Zhang Sizong, Liu Mingkang and others. You have to be a person in the Dao Sect to participate in this matter, so it is very easy for Zhao Yan to know the process of this matter, that is to say, to join the Dao Sect, you don't have to be a Taoist, just be a layman, but Zhao Yan doesn't want to join any Buddhist and Taoist sects. So in the end, I had to give up.

Seeing that the sun was in the west, Zhao Yan took Shu'er to say goodbye to Cao Tong and the others. Then I bought a lot of snacks and snacks at the market outside the door to take home, and the little bean sprouts and Mixue girls liked these things the most.

When Zhao Yan returned to the other courtyard. Cao Ying and Princess Dening have just finished playing mahjong, among which Princess Dening, Princess Bao'an, and Princess Shoukang are all beaming, but Cao Ying is a little unhappy, Zhao Yan saw this and immediately stepped forward and asked, "How much did the lady lose today?" ”

"Giggles, Sister Ying'er's luck is not good today, she is the only one of the four who lost, and she just lost thirty times today." Before Cao Ying could speak, she saw Princess Dening smile and said first, looking at her appearance, it is estimated that most of Cao Ying's thirty losses will fall into her hands.

"Haha, it's only thirty times, it doesn't matter, today my husband and I knocked on the door of the road to get a big income, which is definitely more lucrative than the Cao family's honeycomb coal business!" Zhao Yan laughed when he heard this, and said, Thirty times is definitely not a small amount, it is already a huge amount of money for ordinary people, and it is also pocket money for several months for Cao Ying and them, but today Zhao Yan and Daomen have negotiated the business of glass mirrors, and they naturally don't care about this little money.

Hearing Zhao Yan's words, Princess Dening and the others couldn't help but be startled, and Cao Ying even hurriedly asked: "What kind of business do you plan to do with the husband, and it is even more than our Cao family's honeycomb coal?" ”

You must know that the Cao family defeated the Gao family in one fell swoop by relying on honeycomb coal, thus monopolizing the coal supply of the entire capital, although later out of the consideration of the gate, a part of the coal supply was distributed to the Gao family, but it still occupies the majority of the coal industry in the capital, and the money earned every year is also astronomical, Zhao Yan accounts for more than two percent of it, and this profit alone is enough to make the palace a rich man among the nobles, so when Cao Ying heard Zhao Yan say that it is more profitable than honeycomb coal, he was still a little suspicious for a while.

"Hehe, this incident is also a coincidence, if it hadn't happened today, I would have almost forgotten that there is such a lucrative business!" Zhao Yan said and talked about the glass mirror.

For the glass mirror, except for Princess Dening, everyone else present has seen it with their own eyes, that is, the small mirror on Zhao Yan's microscope, although it is only the size of a copper coin, but it can illuminate people in detail, and even Cao Ying wanted to take possession of this small mirror several times, but if the mirror was given to her, the microscope would not be used, so even if Zhao Yan agreed, Cao Yan and others would never agree.

"Husband, after the glass mirror you said is manufactured, can it really be like the mirror on the microscope, can it really illuminate people very clearly?" After Cao Ying listened to Zhao Yan's story, she immediately rushed to ask, she had coveted the glass mirror on the microscope for a long time, if it weren't for her grandfather, I'm afraid she would have grabbed it.

"Of course, but in terms of clarity, the mirror made with the current technology of Daomen may not be as good as the small mirror on the microscope, but it can be made bigger and more beautiful, and when the sample is made, it must be given to the lady and a few sisters to try first!" Zhao Yan immediately knew the opportunity very well, he knew Cao Ying's thoughts better than anyone else.

"Great, thank you husband (third brother)." As soon as Zhao Yan's words fell, Cao Ying, Princess Bao'an and others immediately said happily, as a woman, I'm afraid no one can refuse a mirror that looks more clearly.

"Third brother, what are you talking about, why can't I understand, what's going on with that glass mirror?" At this time, Princess Dening was confused, she had never seen a glass mirror, and naturally she didn't know what the glass mirror represented.

"Mother, the glass mirror is a mirror that is many times clearer than the copper mirror, and my uncle wants to cooperate with those Taoist masters to make it, and it seems that he should be able to make a lot of money." At this time, Shu'er was the first to speak, when Zhao Yan and Cao Tong discussed the matter of the glass mirror before, he had been by his side, and he naturally knew better than anyone else.

Princess Dening's eyes lit up immediately when she heard her son's explanation, and then she blamed Zhao Yan and said, "Third brother, you are really, why don't you think about our own family first for such a good business?" ”

Zhao Yan had already heard of Princess Dening's housekeeping, but he replied helplessly at this time: "Eldest sister, as the name suggests, glass mirrors are used in manufacturing, but now the manufacture of glass is all in the hands of Daomen, so even if I understand the manufacture of glass mirrors, I can only cooperate with them." ”

Princess Dening is not an unreasonable person, and she understands Zhao Yan's words very well, but then she speaks again: "Forget about the manufacture of glass mirrors, but in the future, the third brother will help my sister get some glass mirrors, if this thing is shipped to the south or overseas, it will definitely be worth ten thousand gold." ”

"Haha, this is no problem, after the glass mirror is officially produced in the future, it will definitely give priority to you, eldest sister!" Hearing this, Zhao Yan immediately patted his chest and reassured, Zhao Yan was also very interested in Princess Dening's maritime power, but unfortunately now there were two strong enemies outside the Great Song Dynasty, Western Xia and Northern Liao, which really made him have no time to take care of overseas affairs.

"Okay, it's worthy of being my own brother, and my sister won't forget to give you dividends to the third brother when the time comes!" Princess Dening was also happy at this time.

In the past two years, Princess Dening has done a lot of business in the south and overseas, and it is also thanks to Zhao Yan, after the honeycomb coal came out, she was the first to start promoting and applying it in the south, and then there was the trade of soap, which allowed her to open the market in the south and overseas, so that the business in her hand almost doubled, and this time with the help of glass mirror business, she will definitely make her business bigger.

"And me, I'm going to have a batch of mirrors in my store!" At this time, Princess Shoukang also shouted, her shop pù after Cao Song's help, finally turned a profit, but she is a three-day fishing and two days of drying nets, usually only occasionally when I think about it, will go to the store to take a turn, today is also to hear the conversation between Princess Dening and Zhao Yan, only to remember her own shop.

"No problem, no one will lose two sisters without it." Zhao Yan assured again that from the appearance of Cao Ying and the three sisters, he seemed to have seen the scene of the glass mirror being robbed after it went on the market.

Time passed quickly, seeing that the two-month summer vacation was about to pass, Zhao Yan also began to prepare for the new classes and enrollment in the next semester, but there was one thing that made him very worried. (The novel "The Idle King of the Northern Song Dynasty" will have more fresh content on the official WeChat platform, and there will also be a 100% lottery gift for everyone!) Open WeChat now, click on the "+" sign in the upper right corner to "add friends", search for the official account "qdread" and follow, hurry up! (To be continued) R655