After a meal, the two sides got to know each other through chatting.

After that, there was nothing to do, and the rain was too heavy to walk.

Ning Ze saw a cloak hanging in the corner of the big house, so he asked the old man, "Uncle, why don't you find two cloak and sell them to us?"

"I'll just use this one of my robes!" the old man shook his head.

"Oh!" Ning Ze thought for a moment, "Then I still can't go." Why don't you find some wood and help you remodel the carriage? Is there a problem with making it a roofed van?"

"The carriage has never been made, and I don't have enough wood. The old man shook his head.

There were no more clothes, and the carriage could not be transformed, and there was nothing to do after eating, and the three of them stared at each other.

After a while, Ning Ze felt too bored: "It's not a way to sit like this, or let's strike iron, right? ”

"With your help yesterday, the orders were completed. The old man yawned, "The ore is also used up, and we will go to mine some when the weather is clear." ”

"What's there to do then, it's so boring to be so idle!"

"It's really boring, you two go back to your room and go to sleep. "The old man is lying down on the bamboo bed," the old man also squinted for a while. ”

It's uncomfortable, do you really go back to your room and sleep?

I just woke up, and I can't sleep back!

Hua Erniang next to her saw him like this, so she whispered: "Why don't you go back to the house to rest, I'll take care of the horses here." ”

"I can't sleep. Ning Ze walked out of the big house bored and walked around under the shed at the door.

Turning his head and seeing the sand piled up in the corner, he suddenly had an idea.

"Uncle!" he asked, as he leaned into the big house, "what is that pile of sand for?"

The old man lay on the bamboo bed and looked at him suspiciously: "Every time it rains, the road is full of pits, so I dig it from the nearby river to pave the road." What do you want to do?"

"Make a little thing, and be idle anyway. ”

"Take it yourself! It's not a valuable thing. ”

"I would also like to borrow your furnace and tools. ”

"Whatever, don't disturb me to sleep. The old man turned to face the wall and closed his eyes.

Ning Ze took down the sieve hanging in the corner of the wall, went outside the house to get some sand, and after several screenings, the finest ones were divided.

Then he took the clay mold from which the old man had smelted iron ore and poured fine sand into it.

He brought the mold containing the fine sand into the house, lived in a handmade high-temperature furnace, poured carbon into it, and used a bellows to burn it red.

When the temperature goes up and it is about the same, carefully put the mold with the sand in the furnace with pliers, and begin to concentrate on pulling the bellows to maintain the furnace temperature.

It's boring and boring, but it's a great way to concentrate and pass the time.

Hua Erniang wanted to come over to help, but Ning Ze asked her to watch the carriage on the side of the hut, which could be done by herself.

Ning Ze maintained the temperature of the furnace and looked at the condition of the sand in the mold while pulling the bellows.

Under the high temperature, as time goes by, the sand begins to melt gradually, slowly turning into a red-hot liquid.

Feeling almost, Ning Ze took a metal rod and stirred it a few times to make sure it was completely melted, and began to anneal slowly, instead of directly taking out the mold to cool it.

This thing isn't metal, and if you cool it down, it's going to explode.

When the temperature of the furnace gradually subsided and felt about the same, he used pliers and carefully took out the mold and placed it in the corner to cool it.

After some tossing, at 4:30 p.m. system time, the cooling was finally completed.

The sand inside the mold has turned into a ball of glass.

Ning Ze took the tool to calculate the strength, carefully smashed the clay mold, and took out the smelted glass.

The edge of this piece of glass is covered with clay and is full of impurities, but the middle part is crystal clear, but the shape is relatively irregular.

No way, after all, this mold is used to make iron, not to smelt glass.

Ning Ze took the tool to knock out the impurities next to him first, then drew the shape on it, and slowly knocked the glass in half little by little.

Then concentrate on sanding with the tool, removing the edges and protrusions around it.

It wasn't until half past five that I barely managed to make two completely irregular "small round cakes".

It took a lot of effort to come up with such two nondescript things, which made Ning Ze quite depressed.

In terms of theory, he really has no problem, but the finished product is completely different from what he expected.

"This thing can't be used......" Holding two completely substandard glass pieces, slightly depressed.

"What did you get after a long day?" the old man finally got up after an afternoon of sleep, and came over to ask.

"Wow!" Ning Ze took the two pieces of glass in his hand and shook it.

"Huh?" Seeing the glass, the old man showed a surprised expression and hurriedly looked closer, "Where did the gem come from?"

"Sand smelting. ”

"The sand that can be found everywhere can be made into gemstones?"

"It's not a gem, but it should be worth a lot of money now, a technology monopoly. Ning Ze sighed, "It's a pity that there is no way to polish and form, it is in vain!"

"Let me see!" the old man reached out and took the glass to observe it for a while, "It's just random polishing, and it can't be ordered!"

"I won't!" Ning Ze got up, "Can you polish it into the shape of a convex mirror?"

"What is that?" the old man looked dazed.

"I'll draw it for you!" Finding a tree branch, Ning Ze simply drew a plan of the convex mirror on the dusty floor of the big house, "It's actually this shape, high in the middle and narrow on the sides." ”

"Does it look like this?" asked the old man, puzzled.

"It's not a question of whether it's good or not, I'm useful. Ning Ze's face was full of anticipation, "Can you polish it like this?" ”

"Try it. The old man also wanted to know what Ning Ze was doing this, so he sat down in the middle with two pieces of glass, took the tools and began to polish them carefully.

"Erniang!" Ning Ze shouted when the old man was polishing the glass.

"Eh!" Hua Erniang immediately came out of the hut and ran in front of him.

"You go to the kitchen and cook. ”

"Yes!"

Seeing that it was dinner time, Ning Ze asked Hua Erniang to cook first, and squatted beside the old man to watch carefully to ensure that the other party would not break the glass.

Fortunately, the old man's skills are good, and after careful polishing, he really made the two pieces of glass into a convex mirror shape: "The old man can only do this, do you see if he can do it?"

Ning Ze took the convex mirror and looked at it carefully: "There is still no way to be completely smooth, and the lines on it will make it relatively blurry." ”

"That can't be helped!" said the old man, "the old man has done his best, at most to this extent, at least much better than you!"

"There's no denying it. Ning Ze smiled, "If it can be polished smooth enough and you can't see these impurities and lines on the surface, it will be called fully qualified." ”

"Jewelry processing and polishing is not the job of an old man. The old man said, "There are people in Dingyuan County who are proficient in this technique. ”

"Dingyuan County?"

"Well, there is a person in Dingyuan County who specializes in jewelry business, and the surrounding merchants all asked him to get the goods. The old man replied, "That man's name is Qiu Baozhi, and his jewelry skills are first-class." ”

"Dingyuan County, Qiu Baozhi ......" Ning Ze silently wrote down this person, "Uncle, can the person you are talking about, in addition to jewelry polishing, like relatively fine objects, do it very well?"

"Probably, by the way, what is this thing used for? It doesn't look like a jewelry accessory in size. ”

"This thing is very interesting!" Ning Ze looked at his feet and found that there were ants near the threshold, so he went over to take a large convex mirror to check.

The old man came over curiously, and saw the magnified ants through the convex mirror, and was suddenly startled: "Demonism?"

"It's not hex. Ning Ze smiled, "It's just the principle of a magnifying glass, which makes things bigger." ”

The old man understood what a magnifying glass was, and after explanation, he finally understood that this convex mirror could make the objects seen by the eyes much larger, but in fact, it did not change itself.

To him, this thing was particularly fresh, so he asked Ning Ze to take the lenses and keep observing the ants like a child, and at the same time let out bursts of amazement.

It took a while to return the convex mirror to Ning Ze: "Is this really sand melting......?"

"If you're interested, I'll melt another piece after dinner. Ning Ze looked at the continuous torrential rain outside the window, "Anyway, this rain can't stop today." ”

"Forget it!" said the old man, though he was very interested, but after thinking about it, he shook his head, "This kind of secret art is too precious, and melting sand into such treasures is like turning stones into gold." If you carefully process and sell it to princes and nobles, you will definitely be able to make you rich in the world. You and I don't know each other, how can we pass on this secret art from one to another?"

"Aren't you interested?"

"It's not that I'm not interested, such a precious technique, don't show it to others casually. After all, people's hearts are unpredictable, and if you trust others too much, it is easy to bring you death!" the old man reminded Ning Ze in a serious tone, it seems that his heart is still good.

Ning Ze smiled when he heard this: "Thank you, uncle! You are a frank person, and you will be blessed." By the way, how are you a carpenter?"

"Since elementary school, what do you say?" said this, the old man looked confident.

"Then can you help me make something?" Ning Ze drew a cylinder on the ground, one big and one small, "The middle needs to be hollowed out, and then these two lenses are just installed at both ends!"

"It's easy, what's the use?" asked the old man.

"You make it for me first, and you'll know then!"

"Okay!" the old man also turned around and picked a more suitable piece of wood among the only remaining timber in the house, and picked up a tool to process it.

An ordinary piece of wood, which rotated flexibly in his hand, gradually changed towards the shape of the cylinder drawn by Ning Ze with the undelayed movement of the tool.

What Ning Ze had to do was a telescope, and when he saw the sand before, he remembered the high-temperature furnace in the house, and suddenly thought of this thing.

Telescopes are used in the military, and the effect is unimaginable.

I have a system function, and I can check the surrounding enemy situation through a virtual map, but I don't really need a telescope. If your generals can be equipped with telescopes, although they are worse than themselves, they can more accurately grasp the enemy's situation and improve their chances of victory.