Taking advantage of the efforts to dissolve the crystal, Xie Wan drew two more pictures and asked the private owner to make a mold.

What she wants is actually a mold for a concave-convex mirror, the molten iron is ready-made, and the mold is very simple and not difficult to make.

About an hour later, the first concave and convex mirrors were born.

Xie Wan picked up the convex mirror and showed it to Li Yu: "Look, this thing can magnify objects." ”

Li Yu lowered his eyes and suddenly felt a novelty, but he didn't realize that what was the use of magnifying an object, it was just a novelty.

Xie Wan smiled at him, asked the private owner to bring a booklet, and then rolled the cover of the private booklet into a cylinder, stuffed the convex mirror into the tube, and then handed it to Li Yu: "You use this to look into the distance." ”

Li Yu took her words and looked into the distance, and his face suddenly changed.

Xie Wan said in a low voice: "The convex mirror can adjust the magnification magnification according to the different radians. It can also be used in combination with the two, and you can see farther and more clearly. ”

Li Yu has been on the battlefield for a few years, and there are some words that he can understand without having to say them clearly.

He looked at it with this simple telescope for a while, and suddenly raised his feet and walked towards the outside of the courtyard, the wooden shopkeeper was stunned when he saw this, and was about to follow, but Xie Wan stopped him: "Let him go and see." ”

Li Yu walked out of the hospital, looked around and climbed to the highest roof, and then looked around with a simple telescope.

After a while, he put away the binoculars and returned to the courtyard, and waved his hand: "Come on, take them all!" ”

Heilongwei suddenly appeared and detained the owner of the private property and several stewards.

The owner of the private shop was about to cry immediately: "Didn't Madame say before that as long as the grass people do a good job, they will not be blamed in the past, and they will spare the grass people?" ”

Xie Wan didn't answer his words, but stood on tiptoe and said in Li Yu's ear: "This thing, in fact, you don't have to use such a good crystal to make it, there is a kind of ore that can be made, and the thing that is made is called glass." ”

"Glass can be made into a variety of ornaments, but also can replace window paper, can not only see through the light outside, but also thermal insulation, very useful, rather than detain these people, it is better to simply take this private shop, specifically to make glass."

Li Yu was silent for a moment when he heard this, waved his hand and let the person go.

He said to Ling Yang: "Go and call Wu Anhou!" ”

Hearing this, Xie Wan hurriedly said, "By the way, I also called Mrs. Wu'anhou and asked her to put on Aunt Cao." ”

"Yes!"

Ling Yang took the order and left, Xie Wan turned his eyes to the wooden shopkeeper and said: "The wooden shopkeeper is more familiar with the capital, and he also bothered the wooden shopkeeper to find some more familiar and hard paper, and bring some more sticky things along the way, such as paste and the like." ”

The wooden shopkeeper answered yes and turned around and walked out of the courtyard.

It didn't take long for Wu Anhou to come in a hurry, and Li Yu showed him a simple telescope.

Just like Li Yu, Wu Anhou's face suddenly changed after looking at the binoculars.

Li Yu took him to a secluded place to discuss the arrangements for this private workshop.

After a while, the wooden shopkeeper came in a hurry, and brought a fellow with him, not only with a pile of papers, but also with all kinds of sticky things.

Looking at the pile of things in front of her, Xie Wan was embarrassed to say that she only needed a little bit.

After all, she is not a professional person, Xie Wan only has the experience of assembling a simple microscope during the small scientific experiments back then, and she can only try a little bit according to her memory.

Li Yu and Wu Anhou came out after speaking, and what they saw was her carefully cutting and assembling on the stone table under the tree in the courtyard.

The sun shone down through the leaves, as if it had brought her a little starlight.

Now that the weather is hot, although under the shade of the tree, Xie Wan is still sweating, she is in a trance, and suddenly someone strokes her forehead and gently wipes the sweat stains on her forehead.

She came back to her senses, turned her eyes, and saw Li Yu's deep black eyes, and her figure was reflected in those black eyes.

For a moment, I felt that the people and things around me were blurred, and only he was as clear as he was in front of me.

It wasn't until there was a light cough that Xie Wan suddenly came back to her senses, and her ears were dyed with heat.

She was actually in front of so many people just now, and Li Yu's eyes were drawn......

Li Yu looked at her reddened ears and cheeks, his eyes were dyed with a smile, he looked at the things on the table, and asked softly, "What is this?" ”

"Microscope." Xie Wan explained: "As the name suggests, it is to be able to make tiny things that cannot be seen clearly or invisible to the naked eye appear. ”

Hearing this, everyone was suddenly surprised, and Wu Anhou exclaimed: "There is such a strange thing in the world? ”

Xie Wan nodded: "I'll know when I'm done assembling it for you to see, but it's just a simple thing, and it's hard to say how much effect it can have." ”

For Wu Anhou and others, it is already very surprising to be able to see small things.

Everyone gathered around and watched intently, even Li Yu looked serious, and Xie Wan's pressure suddenly increased sharply.

Maybe pressure is motivation, and there are still a few mistakes in the original, but I got it right.

"It's done!" Xie Wan casually took a leaf, put it on it, adjusted it, and beckoned Li Yu to come and see.

Li Yu stepped forward, and after looking at it for a while, he was suddenly silent.

Wu Anhou also came over, and after reading it, he was silent.

Xie Wan thought that they didn't understand the meaning of this thing, and was about to explain it to them, when Mrs. Wu'anhou and Aunt Cao finally arrived.

The reason why they were late was mainly because Aunt Cao was on the side of the mass grave, and as soon as Aunt Cao came, Xie Wan immediately beckoned her to come and see.

Cao Gu didn't even bother to salute, so she hurriedly ran over, and when she saw the leaves under the microscope, her first reaction was: "Can you see bacteria?" ”

Xie Wan thought for a while and said, "I can probably see some, if I want to see it more clearly, I have to build a more detailed one." But I probably can't make it. ”

Li Yu said on the side: "Perhaps, you can find the Ministry of Industry." ”

Xie Wan's eyes lit up: "It makes sense, they have delved into delicate things, if they can tell them the method and principle of this thing, maybe they can really do it, including telescopes!" ”

Li Yu immediately instructed Ling Yang again and invited the Ministry of Industry Shangshu over.

While waiting, Xie Wan discussed the symptoms of the gambler with Aunt Cao.

After Cao Gu went back that day, she went to buy melons with enzymes, and now the oranges are not ripe, but the melons are just in the market, although it took some troubles, but I also received some.

After going back, Cao Gu used the soil method to heal the gambler, but unfortunately, although it had an effect, because it had been delayed for too long, the effect was not ideal, and the gambler had died soon.

Xie Wan was silent for a while, and said in a low voice: "That's also a helpless thing, when penicillin can really be extracted, it can be injected into the human body, and the effect will be twice the result with half the effort." ”

Human injection is another new word, and Cao Gu silently wrote it down.

Looking at her serious appearance, Xie Wan hurriedly said: "You can't act rashly in this matter, you have to do countless experiments before you can use it!" Aunt Cao must not be impulsive! ”

Cao Gu glanced at her and said, "Don't worry, this matter is related to the reputation of the mother, and the women will not act rashly." ”