Otaku Engineer in Great Tang Dynasty

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The construction of a dam is generally divided into three steps:

First, interception: dig out a strip or several tunnels or open channels in the natural river, and then intercept the river in the river to make the water flow downstream along the diversion tunnel or diversion channel;

2. Excavation of the foundation pit: The dam can only be built on a stable geological structure, so the sediment on the river channel must be dug out, and the dam abutments (such as door frames) must be dug out on both sides until the bedrock layer is exposed;

3. Filling the dam body: fill the dam body according to the dam type (concrete dam, rockfill dam, etc.) until the top is capped;

The current Bahe Dam is in the second step. Under the order of Li Zexuan, the concrete pillars wrapped with steel bars were driven into the foundation pits dug beforehand. The hammering sound of "dang dang dang"!

After driving the reinforced concrete column into the riverbed, the next step is to use cement to pour the dam body below. Comparatively speaking, this is not difficult, so Li Zexuan looked here for a quarter of an hour and then turned to Mo Huai and the others. Say it and leave!

When passing by the workshop, Li Zexuan moved in his heart, instead of going home directly, he raised his feet and walked towards the workshop.

When I came to the workshop and asked where Mo Lingwei was, Li Zexuan came to a "lab" outside the workshop's headquarters building. The door was left open, and Li Zexuan walked in directly.

I saw Mo Lingwei on the table, tinkering with a strange-looking machine. The upper end of the machine is a cylinder, with many rotating mechanisms in the middle, and a cylinder below the rotating mechanism. Below the cylinder is a square table with a square hole in the middle of the table, and a spring clip is fixed on both sides of the hole.

In terms of appearance, this is basically a "beggar's version" of a modern microscope! Just don't know how the image quality is!

Li Zexuan didn't expect this girl to have such a strong hands-on ability and such high efficiency! You must know that in this microscope, those fine-tuning components are all fine-tuned with screws, and the workshop does not have a machine tool yet, and does not have the conditions for batch processing of threads. The screws used here are all hand-processed.

Therefore, this microscope is absolutely unique in this world. Even Mo Lingwei herself cannot make a microscope that is exactly the same.

This also shows that although one microscope has been built, it cannot be mass-produced.

Looking at the prototype microscope on the table, Li Zexuan couldn't help but say, "Miss Mo, did you make a microscope?"

"Ah~~!"

Mo Lingwei was concentrating on debugging the microscope, when she suddenly heard a voice behind her, she suddenly screamed, almost scared to death!

"Ah! The mountain chief...you...you...you walk without a sound? Also, why didn't you knock on the door? It scared me to death!"

Mo Lingwei turned around and saw that the person who made the sound was Li Zexuan, she rolled her eyes and said angrily.

Li Zexuan said innocently: "Miss Mo, this door is still open, which door should I knock on? Also, who said I was walking silently, and I didn't deliberately control my feet, it was Miss Mo, you were too focused, so I didn't hear it!"

Mo Lingwei snorted arrogantly, then avoided the topic and replied, "This microscope has basically been assembled according to your intention, Mr. Shan, and it is true that some small things can be seen clearly at present, but it's still not enough. There are two problems, which I don't understand!"

Li Zexuan asked curiously, "What's the problem?"

It stands to reason that Mo Lingwei's practical ability in engineering is unmatched in the entire Yanhuang Academy, so Li Zexuan is also very curious about the problems she encountered!

"The first is the light source problem. Because the distance between the microscope objective lens and the observed object is very small, it is difficult for the light to shine on the observed object, so the image seen through the eyepiece will be very dark and difficult to distinguish;

Second, what's the point of building a microscope with so much trouble? Is it just to see the little things? But if you want to see those tiny things, just look at them with a magnifying glass, so why bother? "

Mo Lingwei frowned, very puzzled.

I have to say that this girl's attainments in optics can definitely be regarded as entering the room. Now I communicate with Li Zexuan and say some "professional terms" inadvertently.

Li Zexuan smiled and replied, "Miss Mo, the first problem you found is not that there is no solution! First, you can use a set of fairy mirrors to draw in the sunlight outside the house or the candle light in the house, reflected on the object; second, we can create a light source directly under the stage that holds the object being observed!"

"To make a light source? How to make a light source? Do you want to put a candle under it? That's not possible, the candle will blacken the lens!"

Mo Lingwei said quickly.

Li Zexuan laughed a little: "Who said I should use candles as the light source? Don't worry, the light source I mentioned will never produce any smoke and dust, and the light it emits is several times brighter than the light of a candle. !"

Mo Lingwei asked curiously, "There is no smoke and dust? Could it be that your light source doesn't need to be burnt? But how can there be something in this world that can emit light without burning? Chief, please take out this light source and let me see it!"

At this moment, Mo Lingwei's interest in the light source that Li Zexuan said was far greater than the microscope itself.

Li Zexuan touched his nose, coughed dryly, and said, "Cough! Miss Mo, this kind of light source has not been made yet, and it will take a while, so you should still use the first method I mentioned!"

The light source he mentioned is actually a light bulb. Although he can't get the key material of the light bulb - tungsten wire, he can use other materials to replace it, such as carbonized bamboo wire!

In 1854, Henri Goebbels used a carbonized bamboo thread, which was energized and glowed under a vacuum glass bottle. The light bulb he experimented with at that time could last for 400 hours, while the incandescent light bulb Edison made with tungsten filament later had a lifespan of only about 1,000 hours.

So before finding metal tungsten, it is a very good choice to replace tungsten wire with carbonized bamboo wire!

Mo Lingwei listened to Li Zexuan to "blow" this kind of light source for so long, but at the end she said "I haven't made it yet". Rao is usually very respectful to Li Zexuan, but she couldn't help but turn over to Li Zexuan at this moment. The big white eyes, if it was another person, she would probably start spraying directly: If you don't make it, talk to my mother! How about making fun of the old lady?

"...mountain chief, what about the second question?"

Mo Lingwei took a deep breath and resisted the urge to curse, saying.

Li Zexuan smiled a little embarrassedly and said, "As for the second question, in fact, the purpose of me asking you to make a microscope, Miss Mo, is to observe even smaller objects. It is difficult to see clearly with just a magnifying glass!"

Mo Lingwei wondered: "A much smaller object? What is that? Is it still a molecule or an atom?"

Now in the "Physics" or "Chemistry" textbooks of Yanhuang Academy, there are only introductions about molecules and atoms, so it is not surprising that Mo Lingwei can know about molecules and atoms!

It's just... This girl really dares to say that if she wants to use a microscope to see atoms, this requirement is too high!

First of all, it is necessary to clarify that the size of atoms is around 0.1 nanometer (nm), while the general optical microscope, due to the wavelength distribution of visible light source in 400-700 nanometers, is limited by the diffraction limit, and the resolution limit of optical microscopes is only a few hundred nanometers. So to see atoms with a microscope, you must use a super-resolution electron microscope.

Judging from Datang's current industrial base, let alone more than ten years, even if Datang is given a hundred years, it is estimated that the technology in this area will not develop to that level!

"Miss Mo is joking. I'm talking about smaller objects, not atoms. Oh, by the way, Miss Mo, have you estimated the magnification of this microscope?"

Li Zexuan suddenly thought of a very crucial question, so he asked.

Mo Lingwei thought for a while and replied, "I roughly calculated that the magnification of this microscope should be around 400 times!"

Hearing this, Li Zexuan nodded with satisfaction. The world's first ultra-large magnification microscope made by Levin Hook in his previous life had a magnification of 270 times. Wen. Hook two hundred and seventy times!

"Haha! Very good! Four hundred times, it should be barely usable!"

Li Zexuan laughed, and then pretended to be mysterious: "Miss Mo, follow the method I said before, and then improve the microscope, and then I will show you something good!"

Mo Lingwei was very curious and said, "Shan Chief, what is this good thing?"

"Hey! This is kept secret for the time being!"

Li Zexuan smiled and did not answer.

Mo Lingwei curled her lips in dissatisfaction, then changed to a pitiful face, and said, "Shan Chang, look at me as a girl who doesn't learn poetry and calligraphy etiquette, but works for you in the workshop every day. Is it easy for me to receive your wages? You still treat me like this, and you don’t know how to pity Xiangxiyu! Humph!”

Li Zexuan was agitated, secretly thinking that this girl is really a savage showman, and it is estimated that only Yan Shaoning can surrender, he quickly waved his hand and said: "Cough! It’s also in vain, because I haven’t made my thing yet! But this microscope can make it, you really have contributed, but I’m not a stingy person, you will definitely be satisfied with the benefits I will give you at that time!”

Mo Lingwei's eyes lit up, and she suddenly regained her energy. She hurriedly asked, "What's the benefit? Please tell me about it, Chief?"

Li Zexuan laughed and said, "The benefit is to help you match with Yan Shaoning! How is it? What is the benefit?"

"ah!"

Mo Lingwei had a rare blushing face, and she said angrily: "Who... Who is going to marry him... That, Mountain Chief, when will you help us match?"

"Um?"

Li Zexuan was stunned, Mo Lingwei was driving too fast, he almost didn't turn the corner, "Cough! As soon as possible! I will mention this to your father and Uncle Yan as soon as possible! Uh... you are busy first, I If you have something else to do, let's go!"

Li Zexuan hurriedly ran away, he was afraid that if he stayed with this girl for a while, his head would become abnormal!

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