The dam construction process is generally divided into three steps:
1. Interception: dig one or several tunnels or open channels on the natural river, and then intercept the water on the river to allow the water to flow downstream along the diversion hole or diversion open channel;
2. Excavating the foundation pit: The dam must be built on a stable geological structure, so the sediments 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. Fill the dam body: Fill the dam body according to the type of dam (concrete dam, rockfill dam, etc.) until the top is capped;
The current Bahe Dam has reached the second step. At Li Zexuan's order, cement pillars wrapped with steel bars were driven into the foundation pits dug in advance. The riverbed of the Bahe River was suddenly filled with The hammering sound of "dang-dang-dang"!
After driving the reinforced concrete pillars into the river bed, the next step is to pour cement into the dam body below. Comparatively speaking, this is not difficult, so after Li Zexuan looked here for two quarters of an hour, he asked Mo Huai and the others After saying that, he left!
When passing by the workshop, Li Zexuan's heart moved. Instead of going home directly, he walked towards the workshop.
After arriving at the workshop and asking about Mo Lingwei's whereabouts, Li Zexuan came to a "laboratory" in the workshop headquarters building. The door was not closed, just open, and Li Zexuan pushed the door open and walked in.
He saw Mo Lingwei tinkering with a strange-looking machine on the table. The upper end of the machine is a cylinder with many rotating mechanisms in the middle. The rotating mechanism is also a cylinder. There are four square tables under the cylinder. There is a square hole in the middle of the table, and a spring clip is fixed on both sides of the hole.
From the appearance point of view, this is basically a "beggar's version" of a modern microscope! I just don’t know how the image quality is!
I didn’t expect this girl to be so capable with her hands and work so efficiently! You must know that all the fine-tuning parts in this microscope are fine-tuned with screws. The workshop does not yet have machine tools and does not have the conditions to process threads in batches. All the screws used here are processed by hand.
Therefore, this microscope is absolutely unique. Even if Mo Lingwei makes another one, she will not be able to make it exactly the same.
This also shows that although one microscope has been built, it cannot be mass-produced.
Looking at the embryonic microscope on the table, Li Zexuan couldn't help but said: "Did Miss Mo make a microscope?"
"Ah~~!"
Mo Lingwei was concentrating on adjusting the microscope when she suddenly heard a voice behind her and screamed. She was almost scared to death!
"Ah! Chief...you...you...how come you don't make any sound when you walk? Also, why don't you knock on the door? You 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 with an innocent face: "Miss Mo, this door is not closed. Which door should I knock on? Also, who said that I have no sound when I walk? I didn't control my feet deliberately. It was Miss Mo who was too focused, so I just didn’t hear it!”
Mo Lingwei snorted proudly, then avoided the topic and replied: "This microscope has basically been assembled according to your wishes, Chief Shan. It can indeed see some small things clearly, but there are still There are two questions that I can’t figure out!”
Li Zexuan asked curiously: "What's the problem?"
It stands to reason that Mo Lingwei's practical ability in engineering is unparalleled in the entire Yanhuang Academy, so Li Zexuan is also very curious about the problems she encounters!
"The first is the light source problem. Since the distance between the microscope objective lens and the object being observed is very small, it is difficult for light to reach the object being observed, so the image seen through the eyepiece will be very dark and difficult to distinguish;
Second, what is the point of going to such trouble to build a microscope? Is it just to see some small things clearly? But if you want to see those tiny things, you can just use a magnifying glass, so why bother? "
Mo Lingwei frowned and said in confusion.
I have to say that this girl's attainments in optics are definitely considered to be a master's degree. Now when she is communicating with Li Zexuan, some "professional terms" she inadvertently said would be incomprehensible to another person. She's so strong!
Li Zexuan smiled and replied: "Miss Mo, the first problem you discovered is not that there is no solution! First, you can use a set of fairy mirrors to reflect the sunlight outside the house or the light of candles inside the house to objects. Secondly, we can create a light source directly under the stage carrying the object being observed!"
"Create a light source? How to create a light source? Chief Shan, don't you want to put a candle under it? That's not possible, the candle will blacken the lens!"
Mo Lingwei said quickly.
Li Zexuan said with some humor: "Who said I want to use candles as a light source? Don't worry, the light source I mentioned will never produce any smoke when it shines, and the light it emits is several times brighter than the light of a candle! "
Mo Lingwei asked curiously: "There is no smoke? Chief Shan, does your light source not need to burn to shine? But how can anything in this world shine without burning? Chief Shan, please take out this light source and let me see it!"
At this moment, Mo Lingwei was far more interested in the light source Li Zexuan mentioned than the microscope itself.
Li Zexuan touched his nose, coughed dryly, and said: "Ahem! Miss Mo, this kind of light source has not been made yet, so you should use the first method I mentioned!"
The light source he is talking about is actually a light bulb. Although he can't get the key material of the light bulb - tungsten filament now, he can use other materials instead, such as carbonized bamboo filament!
In 1854, Henry Goebbels used a carbonized bamboo filament and placed it under a vacuum glass bottle to make it glow with electricity. His invention appears today to be the first practical incandescent light bulb. The light bulb he tested at that time could already last for 400 hours. Later, the incandescent lamp made by Edison using tungsten filament had a lifespan of only about 1,000 hours.
So before you find metal tungsten, using carbonized bamboo wire instead of tungsten wire is a very good choice!
Mo Lingwei listened to Li Zexuan "blow" this kind of light source for so long, but at the end she said "it hasn't been done yet". Even though she usually respected Li Zexuan very much, she couldn't help but do it to Li Zexuan at this moment. With a big eye roll, if it were anyone else, she would probably start complaining: "Why don't you tell me that I haven't done it yet!"
"... Chief Shan, what about the second question?"
Mo Lingwei took a deep breath, resisted the urge to curse, and said.
Li Zexuan smiled awkwardly and said, "As for the second question, in fact, I asked Miss Mo to make a microscope to observe smaller objects. It is difficult to see clearly with just a magnifying glass!"
Mo Lingwei wondered: "A smaller object? What is that? Is it still molecules or atoms?"
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 knows about molecules and atoms!
It's just... This girl really dares to say that if she wants to use a microscope to see atoms, the requirements are too high!
First of all, it is necessary to clarify that the scale of atoms is about 0.1 nanometers (nm). However, for general optical microscopes, since the wavelength of the visible light source is distributed between 400 and 700 nanometers, it is limited by the diffraction limit. The resolution limit of the optical microscope can only be a few hundred nanometers. So if you want to use a microscope to see atoms, you must use a super-resolution electron microscope.
Judging from the current industrial base of Datang, let alone more than ten years, even if Datang is given a hundred years, it is estimated that technology will not develop to that level!
"Miss Mo is joking. The smaller objects I'm talking about are not atoms. Oh, by the way, Miss Mo, have you ever calculated the magnification of this microscope?"
Li Zexuan suddenly thought of a very crucial question and asked.
Mo Lingwei thought for a while and replied: "I have roughly calculated that the magnification of this microscope is about 400 times!"
After Li Zexuan heard this, he nodded with great satisfaction. The world's first ultra-high-power microscope made by Levin Hooke in his previous life had a magnification of 270 times. The one made by Mo Lingwei has completely surpassed the world's first ultra-high-power microscope. Two hundred and seventy times that of Hooke!
"Haha! Very good! Four hundred times, it should be barely usable!"
Li Zexuan laughed loudly, then pretended to be mysterious and said: "Miss Mo, please follow the method I told you before and then improve the microscope. Then I will show you something good!"
Mo Lingwei was very curious and said, "Shan Chief, what kind of good thing is this?"
"Hey! This is a secret for now!"
Li Zexuan chuckled and didn't answer.
Mo Lingwei curled her lips in dissatisfaction, then changed her face to a pitiful expression and said: "Chief, look at me, a girl who doesn't learn poetry, calligraphy and etiquette, but works for you in the workshop every day, why don't you... Is it easy for me to collect your wages? You still treat me like this, you don’t know how to show mercy at all! Humph!"
Li Zexuan was excited and secretly thought that this girl is really a savage drama queen. It is estimated that only Yan Shaoning can surrender. He quickly waved his hands and said: "Ahem! Miss Mo, I have something to show you in the next few days. Now let's talk about it." It’s all in vain, because I haven’t made that thing yet! However, you have contributed a lot to the fact that this microscope can be made, but I am not a stingy person, and you will definitely be satisfied with the benefits I will give you when the time comes!”
Mo Lingwei's eyes lit up and she immediately became energetic. She hurriedly asked: "What are the benefits? Chief, please tell me."
Li Zexuan chuckled and said, "The good thing about this is that I can help you negotiate with Yan Shaoning! How about that? How about this good thing?"
"ah!"
Mo Lingwei suddenly blushed and said angrily: "Who... who is going to marry him... Chief, when are you going to help us with the matchmaking?"
"Um?"
Li Zexuan looked confused and almost didn't turn the corner, "Ahem! As soon as possible! I will mention this to your father and Uncle Yan as soon as possible! Well...you go ahead, I have something else to do, so I'll leave first!" "
Li Zexuan hurriedly ran away. He was afraid that if he stayed with this girl for a little longer, he would be disturbed!
………………………
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