After Cao Tong and Zhilugu saw the magic of the microscope, both of them immediately became fascinated by this thing, first learned from Zhao Yan how to use the microscope and precautions, and then began to try their best to find the things that could be found around them and observe them under the microscope, looking at their appearance, it was no different from the first time the primary school students in later generations came into contact with the microscope.

Zhao Yan was also very happy to see this, and immediately asked people to arrange a place for them to live, judging from their current state, it is estimated that even if Zhao Yan drives them away, they will not leave, and even Zhao Yan plans to pass on some of the medical knowledge he knows to them, although there is a big difference between Western medicine and Chinese medicine, but the combination of Chinese and Western medicine is not popular in later generations? Moreover, since I have advanced this combination by a thousand years, there will be no Western medicine in the future, and it will all be included in the theory of Chinese medicine.

Sure enough, Cao Tong and Zhilugu have been circling the microscope all day, and they also directly proposed to stay at night, and it is worth mentioning that if it weren't for the light at night that the microscope couldn't see clearly, I'm afraid they would have stayed all night studying the new world brought by the microscope to them on the first night of the other courtyard.

After dinner in the evening, Zhao Yan first sent the eldest Zhilugu back to rest, and then accompanied Cao Tong to find Cao Ying, which was also requested by Cao Yan, because he said that he had not seen his granddaughter for several years, and he missed it very much, and he had no time to talk to Cao Ying during the day today, so he planned to take advantage of the evening to meet his granddaughter. However, Zhao Yan always felt that Cao Yan didn't seem to want to see Cao Ying, but had something to say to himself.

Sure enough, as soon as the two of them left the courtyard of Zhilugu. Seeing Cao Tong smile, he said with some numbness: "Son-in-law, today I am also an eye-opener, whether it is the syringe you took out before, or the microscope later, it is extremely exquisite, as for the etiological theory you said, it is also very enlightening to us!" ”

It is said that there is nothing to be done, and it is either a traitor or a thief, and Zhao Yan immediately became vigilant in his heart. However, he still said modestly: "Grandfather is too complimentary. The grandson-in-law only knows some medical skills, but as for curing diseases and saving people, he can never reach his grandfather and the direct divine doctor! ”

"Haha, the virtuous grandson-in-law is still too modest. The knowledge you showed today has stunned both of us. If that's what it looks like. Then the two of us are going to be embarrassed. Cao Yan laughed and praised again, but the more he complimented, the more Zhao Yan felt that something was wrong.

Really. As soon as Cao Yan's laughter fell, he immediately showed a somewhat embarrassed expression and said, "Son-in-law, I have a reluctant request, and I hope you can agree!" ”

"Grandfather is polite, as long as he doesn't borrow a microscope from his grandson-in-law, everything else is easy to discuss!" Zhao Yan knew that Cao Tong must not be at ease, and it must have something to do with the microscope, so as soon as he opened his mouth, he directly blocked the words first.

"Uh~" Cao Yan was also stunned when he heard Zhao Yan's words, he didn't expect that before he could say it, Zhao Yan had already guessed it, and indicated that he didn't want to borrow it, which made him very disappointed, but he was also a good person, and immediately thought of another way, and then said with a smile: "Grandson-in-law Xian misunderstood, grandfather, I didn't want to borrow a microscope, but I saw that since the microscope is so useful, especially for medicine, I want to build a few more microscopes, but I don't know if the grandson-in-law knows how to make them?" ”

Cao Yan's expression changed in Zhao Yan's eyes, and when he heard him hit his idea on his own manufacturing again, Zhao Yan smiled secretly in his heart, and said with a smile: "Grandfather Qiqi, I know some of the manufacturing principles of this microscope, but if you want to make a microscope, you need all kinds of materials, and the rest is easy to do, but the microscope needs to use glass, and the general glass is not enough, it must be lead glass with excellent transparency, our Da Song Dynasty does not have it, so it can't be made at all!" ”

"Lead glass?" Cao Tong was stunned again when he heard this, but soon he said ruthlessly, "Son-in-law Xian, you tell me where there is lead glass, I will move the entire Dao Gate to find it, even if it is overseas, we can help you find it!" ”

Zhao Yan was also very surprised when he heard this, it seems that Cao Tong is determined to make a microscope, speaking of which, glass is also available in the Great Song Dynasty, but it is not made by the Great Song Dynasty itself, but it is shipped from overseas, and the price is not cheap, Zhao Yan has seen some before, they are all shoddy glass products, and even some are green glass, obviously the iron in it has not been removed, this kind of glass is not to make a microscope, and it is not even qualified to make ordinary mirrors, as for the real lead glass, it will take six or seven hundred years to appear.

Thinking of this, Zhao Yan sighed and said: "Grandfather doesn't know, although glass is abundant overseas, their technology in firing glass is so poor that they can't burn lead glass at all, I'm afraid there are only a few pieces on my microscope in this world." ”

When Cao Tong heard this, he couldn't help but show a disappointed expression again, but he was still a little unwilling, and immediately asked: "Son-in-law Xian, listen to the meaning of your words, it seems that you know how to burn lead glass?" ”

"This ......" Zhao Yan didn't expect Cao Yan to be so persistent, and after thinking about it, he finally spoke, "I know a little about the firing of lead glass, but that has to be on the basis that someone can burn ordinary glass, and now no one in our Great Song Dynasty can burn glass, let alone lead glass, so grandfather, you should give up the idea of making a microscope!" ”

However, although Zhao Yan kindly persuaded Cao Tong to give up this unrealistic idea, he forgot that Cao Tong himself is a cultivator, not to mention whether cultivation can really become an immortal, but people who can seek Taoism for many years must have an extremely firm Taoist heart, as long as such people recognize one thing, then they will never give up, even if they encounter great difficulties, they will catch up, unfortunately, Cao Tong has now regarded the manufacture of microscopes as an important goal in his life.

It is precisely because of this that I saw Cao Tong open his mouth at this time: "Hehe, thank you for your kindness, but I will find a way to solve the technology of firing glass, and I hope that Grandson-in-law Xian will definitely guide those craftsmen and let them make suitable lead glass, with lead glass, the microscope will be just around the corner!" ”

Seeing that Cao Yan was so stubborn, and even a little paranoid that he wanted to make a microscope, Zhao Yan couldn't help but sigh, but he couldn't refuse the other party's request, so he finally nodded and said, "Okay, as long as you can burn glass, grandfather, I will do my best to help you make a microscope." ”

Cao Tong saw that Zhao Yan finally agreed, and a smile appeared on his face, as for the matter of glass firing technology, although the Great Song Dynasty did not have it, but there were outside the Great Song Dynasty, although the Daomen was overpowered by Buddhism, but the strength should not be underestimated, with his identity, it is not difficult to get the glass firing technology in the Daomen, the reason why I didn't do it before was because the Daomen did not have this demand, but now it is.

Zhao Yan was also relieved to see that Cao Tong finally stopped pestering himself to ask about the manufacture of microscopes, but before he could take a few steps forward, Cao Yan suddenly asked again: "Son-in-law, there is one thing I wanted to ask before, but because Zhilugu was also there, I didn't speak, but I didn't know whether to ask or not?" ”

Hearing Cao Yan's somewhat verbose and tentative words, Zhao Yan sighed again, secretly thinking that what should have come has finally come, and immediately said: "If my grandson-in-law is not mistaken, grandfather wants to ask how the syringe and microscope came from, and who did I learn from the knowledge I know?" ”

"Yes, syringes and microscopes are these two things are extremely exquisite, the old man is conceited and erudite, but he has never seen it before, as for the etiological theories and microorganisms that my grandson-in-law said today, they are even more unheard of, and these things cannot appear out of thin air, and they are not even studied by one or two people, so the old man is also very curious about the origin of these things!" Cao Yan also said with a smile at this time, in fact, he still had something to say, that is, Zhao Yan was just a gentleman before, how could he understand so many things in such a short period of time?

Zhao Yan had already guessed that Cao Tong would ask this, and the identity of the other party was destined to make it impossible to hide this matter from him, so Zhao Yan thought about it for a while, and finally spoke: "As for the origin of the syringe and the microscope, as well as the source of those knowledge, she knows these things, why don't you let her tell you after her grandfather meets the lady later?" ”

Cao Yan was not surprised to hear this, after all, Zhao Yansheng had changed so much, if his granddaughter didn't know anything, it would be a strange thing. So the two of them quickened their pace and came to Cao Ying's room in the inner house, at this time Cao Ying was settling accounts with Mi Xue, and when she saw her grandfather and Zhao Yan coming in together, she was also very happy, and immediately put down the account book and greeted her.

Cao Yan was anxious to know the reason for Zhao Yansheng's big change, so after chatting with Cao Ying for a few words, he immediately waved his hand to let Mi Xue and the other maids retreat, so that only he, Zhao Yan, and Cao Ying were left in the room, and then he repeated the question he had just asked Zhao Yan, and then waited for Cao Ying to answer him.

After Cao Ying listened to her grandfather's question, she glanced at Zhao Yan meaningfully, and then smiled at the statement that Zhao Yan was struck by lightning on the day of the wedding, and then met the immortals, and even deliberately pointed out that although Zhao Yan was only in a coma for a moment, he had spent many years in a dream, but Cao Ying seemed to ignore the names of the two immortals that Zhao Yan met intentionally or unintentionally, and only vaguely said that they were immortals dressed as two Taoists. (To be continued!)

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