Thinking of the 100-year history of humiliation in the previous life, it was because of the backwardness of modern science that he was knocked on the door by the enemy country and suffered humiliation and brutal killing.

If you keep the lead, even if the dynasty changes, the Han people will still be the owners of this land, and they will not be eaten by foreigners.

In the evening, the things that Carpenter Sun made were ready.

Carpenter Sun asked his apprentice Xiaoshi to send it over, and said with a smile: "Sister Yue, this is what you asked my master to make." Can I buy you three potbelly lenses? ”

"I want to make something that I can see far, and I want to make a magnifying glass for Master. In this way, the master does not have to squint. ”

Li Xiaoyue rubbed Xiaoshi's head, "Of course not." ”

Xiao Shi's fleshy little face suddenly showed a disappointed expression, "Is it expensive?" ”

"I don't sell it to you, but I can give it to you." Li Xiaoyue smiled, "Happy? ”

Hearing Li Xiaoyue's words, Xiao Shi's eyes instantly lit up, "Really? ”

"Of course it's true!" Li Xiaoyue smiled, "Actually, these lenses have a lot of functions, aren't you curious?" ”

"Curious!" Xiao Shi's eyes widened, and he looked serious, "It's a good weather today, I was holding a magnifying glass, and that point of light fell on my palm, and I felt a heat, almost burning me." Is this a concentration of the heat from the sun and a transfer to my hands? ”

Li Xiaoyue looked at Xiao Shi's eyes full of curiosity, and looked this child up and down, he is a good seedling for scientific and technological research.

"We all know that the sun is warm when it appears, and light is hot. A lot of light beams can be concentrated through this lens, and the heat is also concentrated, so you will feel hot. ”

"It's similar to the flowing water in the river, where the passage is narrower, the water will be more turbulent, similar to the truth."

Xiao Shi frowned, "Sister Yue, I suddenly feel that what you said makes sense. I've always felt like this stuff could do more, but we haven't found out yet. ”

"yes, so let's study it together, okay?" Li Xiaoyue guided Xiao Shi and guided Xiao Shi in the direction of a science madman, so that he could study more natural sciences in the future.

Xiao Shi's eyes lit up, "Can this really be the case?" ”

"Absolutely." Li Xiaoyue replied, "Are the numbers I taught you in the past easy to use?" ”

Little Stone nodded, "It's easy to use." ”

"In the future, we will use those numbers to mark, and we will study these lights together." Li Xiaoyue smiled and rubbed Xiaoshi's head.

"Good!" Xiao Shi smiled, "Sister Yue, I'm going back, Master is still waiting for me to eat." ”

"Then go back and walk carefully." Li Xiaoyue sent the small stone to the door, which strengthened her idea of wanting basic natural science to be passed on.

After Li Xiaoyue returned, she began to compile primary school mathematics textbooks.

Addition, subtraction, multiplication and division, fractions, etc.

Li Xiaoyue wrote very seriously, and before she knew it, it was dark outside.

Gongsun Lian is leaving tomorrow, and he came to say goodbye today.

Seeing Li Xiaoyue writing in the study, he knocked on the door and walked in.

"What are you writing about?" Gongsun Lian asked, looking down.

He knew the set of Fanbang symbols that Li Xiaoyue used.

Li Xiaoyue replied: "Recently, I have been thinking in my mind that we people in Dayan usually attach importance to the Four Books and the Five Classics, and all other aspects of research have become miscellaneous subjects. ”

"Actually, I think that the Four Books and the Five Classics teach people the truth of being a human being, cultivating people's sentiments or how the ruling class governs the people."

"What really drives the development of this era is the research of countless craftsmen. For example, doctors study medical techniques to treat diseases and save people, so now there are more and more good prescriptions, and there are more and more ways to treat them. ”

"For example, carpenters, the skills have been passed down and developed, and more and more things have been built, which has greatly facilitated our lives."

"For example, the loom and spinning wheel that I made greatly increased the productivity of labor, made the price of cloth cheaper, and more people could wear decent clothes."

"In addition, if you look at this thing in my hand, it is just a piece of water jade with a thick middle and thin sides, which can enlarge the font."

Li Xiaoyue said as she picked up a magnifying glass and put it on the words she had just written.

Gongsun Lian was slightly stunned when he heard this, took the magnifying glass, put it in his hand and touched it, it was indeed a thick middle and thin round pieces of water jade on both sides.

"It's night, and I can't give you another function of the magnifying glass. If you are under the sun, if the focus of the magnifying glass falls on licorice or something flammable, it can catch fire. ”

Hearing this, Gongsun Lian couldn't put it down, "Can you give this to me?" ”

Li Xiaoyue nodded, "Of course you can, but I think you might want something else." ”

Gongsun Lian was surprised, "What else is good?" You can take it out together, don't whet my appetite! ”

He was now more and more curious about why Li Xiaoyue had learned so many things?

Is it possible to figure it out if you think about it in your head?

Li Xiaoyue took out five telescopes, which can also be telescopic and adjust the focal length.

"You use this telescope to look through my window at the observation tower of the Dongshan Barracks on the top of the mountain."

"Telescopes?" Gongsun Lian was slightly stunned when he heard this, and looked up into the distance, "Looking through the window, I can only see one bright spot." ”

Then Gongsun Lian took a telescope to look at the bright spot, and was slightly stunned, "Inside the lookout, there is a person who is actually asleep!" ”

"Oh, how can I see clearly? At such a distance, it is impossible to see it with the naked eye! ”

With that, he put down his binoculars and looked at the bright spot again.

Repeating it a few times, I was quite excited.

Li Xiaoyue said with a smile: "Now you can practice more according to what you see, and you can roughly calculate the distance." ”

"You bring this with you, and it might come in handy on the road!"

Gongsun Lian couldn't put it down, "Is it only me?" ”

"Of course not!" Li Xiaoyue replied, "One for my father, one for my eldest brother, and the rest of the one, I will ask Chang Fu to give it to General Huo tomorrow." ”

"This thing is in General Huo's hands, on the battlefield, and it can play a greater role."

Gongsun Lian nodded again and again, just now he thought that Li Xiaoyue had given him a special person, and he was still happy.

Now I feel narrow-minded.

How can such a good thing be kept private?

The purpose of this thing is really, really big.

"Do you have anything good here?" Gongsun Lian asked.

Li Xiaoyue shook her head, "That's all for now, I'll tell you when I have new discoveries." ”

"In addition, there are very few people who can really pass the imperial examination. It's good to be admitted to the show! ”

"A lot of people just read to know a few words, and I want to teach them arithmetic and some science. Transform some of the arithmetic knowledge of our ancestors into more understandable content, and express it with these symbols, which is easier to learn, easier to remember, and easier to use. ”