Su You smiled and said: "These are all things I made myself. They are different from those bought with money. I can't say they are extravagant and wasteful."

Shi Fu nodded: "That's right, Hachigong, you can feel at ease. This was all done by Xiaoyou himself. It's his duty to fulfill his filial piety."

Hachiko still chose the osmanthus wine, and used a small bamboo handle and a small porcelain funnel to lift a jade porcelain bottle and put it on the table: "This wine vessel is also very particular. Hahaha, don't look at the small bottle and the small cup. If you don't pay attention, it will

Get high."

Shi Wei looked at the cute little porcelain cup: "Uncle Su, I want to drink too."

Hachigong said: "Children can't drink this. Xiaoyou is going to boil some mash water and you two can drink it."

But Shi Fu took the bottle and poured it for Shi Wei: "Jiangmen's daughter, a glass of strong wine is nothing."

Su You shamelessly said, "Then I'll have a drink with Wei'er too."

Hachigong scolded: "I'm afraid Wei'er was also instigated by you, right?"

Shi Fu also added a glass to Su You: "He is the one who made the wine, how can you prevent it? I'm afraid this kid has drank a lot during the wine tasting!"

Su You was unconvinced: "Did I call it drinking? There are no dishes. What I called quality monitoring!"

Shi Fu and Shi Tong couldn't help but laugh, and Hachiko also laughed angrily: "I can't control you anymore. I agreed that I can only have one cup."

Everyone walked away together, and Wei'er took a sip: "The sweet-scented osmanthus smells so good..."

Shi Fu was very happy: "Look, I said Wei'er is amazing, right? There's no problem at all."

Su You said: "Alcohol is indeed a good thing. I used alcohol to disinfect the wounds of the castrated roosters. Not a single rooster died."

Only then did Shi Tong remember: "Shi Da asked me to bring something. He said you asked him to make it. I heard it was related to this wine. I almost forgot if you didn't mention it."

Su You said: "I have been so busy these days that I even forgot that this is an alcohol concentration meter. In the future, there will be standards for good wine and inferior wine. Yongchun Lu is so expensive, we have to let everyone know that it is

Only if there is a reason.”

Shi Tong said: "Yes, just like the so-called ratchet in a micrometer, it is actually realized by knurling on two copper sheets and a thin spring. It is somewhat different from the mechanical ratchet you have drawn before, Master."

Su You said: "That is called a force measuring mechanism. Although its purpose and appearance are different, it actually controls one-way rotation. The principle is the same, so it is correct to call it a ratchet."

"For example, the ball bearings used in folding knives and the ball bearings used in waterwheels have two forms. One is to reduce the friction between the inner and outer rings, and the other is to reduce the friction between the upper and lower pieces. The principles of reducing friction are both

The same, so they are both called ball bearings."

Shi Tong took a large piece of twice-cooked pork and put it in his mouth: "I understand, Master, with a manual punching machine and a micrometer, I believe I can make qualified small balls this time. I will bring the finished product to you for tasting next time!

"

Su You smiled and said: "You put it simply, it is easy to make small ball balls, but it is difficult to make small ball balls with exactly the same caliber. If you just pick a few out of hundreds and pair them up, it is still a small workshop!"

It’s early!”

"After you understand various mechanical principles and geometric motion trajectories, you will be able to design your own machinery. You must strive to increase the pass rate as soon as possible."

After saying that, he thought about it again: "Bearings and slide rails are of great use to me in the Song Dynasty. The key to them lies in the balls. To finely grind the balls, you need to use ball fine grinding equipment to increase the yield. And the ball precision

The mill involves another interesting mathematical phenomenon, so tomorrow we will continue the class and talk about this thing."

Shi Wei said: "Clockwork is also very useful! Shi Tong, did you bring me a clockwork? Brother Xiaoyou took my Jinchan's clockwork to make a thermometer."

Shi Tong patted his chest and said, "Bring it with you, don't worry, little aunt, I will prepare it for you after dinner. I guarantee that your golden toad will be alive and kicking again!"

After dinner, Shi Tong reinstalled the golden toad for Shi Wei, and then began to hang the thermometer.

Suyou's design combined with Shijia Ironworks' craftsmanship makes the new thermometer much more beautiful.

A clock-like dial, with all the mechanisms below the dial and only a thin copper plate on the dial.

Below the copper plate is a stamped pattern. An old man is bending down and talking to two children. One of the children points to the sun in the sky.

This is an allusion to Confucius and his two children arguing about the sun. It is based on the meaning of the article: "The sun rises in Cang Cang and is cool, and the middle of the day is like exploring the soup. Is it not hot for those who are near, but cool for those who are far away?"

With this decoration, an ordinary thermometer immediately becomes extremely high-end.

There is a fan scale and thin pointer above the disc.

The thermometer was hung on the wall outside the main room. Hachiko looked at it for a long time with his hands behind his back: "It's beautiful. The temperature above is thirteen, right? What does thirteen mean?"

Su You was also very satisfied with this thermometer and said with a smile: "This is a thermometer. It roughly means the temperature at which water boils is 100 degrees, and the temperature at which water freezes is zero degrees. The temperature in Meishan is generally between a few degrees to forty degrees.

It’s now 13 degrees, which is considered a normal temperature for early winter.”

After saying that, he waved to Shi Chuan and said, "If you want to sell this watch to Khitan in the future, the sub-zero temperature must be marked. I heard that when it's cold over there, it can reach dozens of degrees below zero."

Shi Tong said angrily: "If I smash all my good things, I won't give them to Khitan dogs!"

Su You was so angry that he kicked Shi Tong: "Are you stupid, are you stupid! If this thing can be exchanged for several good horses, shall we do it? Shall we do it?! I'll kick you to death, you stupid apprentice."

…”

Shi Tong was not ashamed but proud, grinning widely: "Master, master, you finally call me your apprentice..."

Su You put his hand on his forehead: "We can't talk to a big rock like you. Weier, let's go and get our concentration meter!"

The concentration meter is actually very simple. It is a small sealed porcelain bottle with a pointed bottom and a thin porcelain tube connected to it. The porcelain tube is hollow and connected with the porcelain bottle.

Pour very small porcelain beads into the porcelain bottle through the tube, and adjust it until all the porcelain bottles are submerged in the water, and most of the porcelain tube can still be suspended on the water surface.

Then the position of the water surface at this time is zero degrees. Then put the tube into pure alcohol. The tube will sink a lot, and the scale obtained at this time is one hundred degrees.

Then the question arises, what should be used to mark the scale?

Alcohol is an effective solvent for most organic pigments! Even raw lacquer cannot handle it.

After much deliberation, Su You had to find a thin silk thread and wrap it around a few sections. The boundary between the upper end of the silk thread and the porcelain tube represented the degree.

Once you have one to a hundred, you only need to divide it equally in between.

This degree does not need to be too precise, just tie a piece of silk thread every five degrees.

The tube was a bit long, so Su You took two short tubes and made two alcohol concentration agents from 0 to 50 degrees and from 50 to 100 degrees respectively.

In fact, it is very simple to solve the problem of scale. Later generations of concentration meters directly used glass tubes with a piece of paper with scale inserted inside, so that the liquid could not soak into it.

Glass...well, it's actually not difficult.

But there are many things to do, so if you don't need something urgently, just take your time. Anyway, you can make do with it. Su You clapped his hands and said to Shi Wei: "There is no way, this is the only way now."

Shi Wei was still immersed in the magical world of buoyancy: "Brother Xiaoyou is so amazing..."

Su You smiled, you are the one who is a crazy fan. He couldn't help but touched Shi Wei's head: "You know what makes you great? I will explain the truth to you another day. Now let's play with the music box. , Shi Da brought a few more songs."

The rollers in the music box are replaceable. The small teeth on the rollers move the steel plates, which will produce tinkling music. One roller is responsible for one song.

The first box is the later music "Farewell", the one beside the ancient road outside Changting. However, these songs are so weird now that Su You can't understand them.

Shi Tong was proud of it: "I discovered it! Master, you are no good at music, painting, chess... you are all an amateur! Your box was not in tune last time!"

There are some differences between traditional Chinese classical music and later Western music. There are five regular tones and two altered tones. Among them, Bian Zheng and Bian Gong are the Fa and Xi in later Western music, and were rarely used by the ancients.
Chapter completed!