Vol 2 Chapter 1339: When will you help us mediate?

The construction process of 　　 dam is generally divided into three steps:
　　 One, interception: dig one or several tunnels or open channels in a natural river, and then intercept the river to make the water flow downstream along the diversion tunnel or open diversion channel;
　　 2. Excavation of foundation pits: The dam must be built on a stable geological structure. Therefore, the sediment on the river channel must be excavated, and the dam abutments (like 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 type of dam (concrete dam, rockfill dam, etc.) until the top is sealed;
The current Bahe Dam has reached the second step. Under Li Zexuan’s order, concrete pillars wrapped in steel bars were driven into the excavated foundation pit. The riverbed of the Bahe River was suddenly full of The "clang clang clang" hammering sound!
After driving the reinforced concrete column into the riverbed, the next step is to pour the lower dam body with cement. In comparison, this is not difficult, so Li Zexuan looked here for two quarters of an hour and then went to Mo Huai. Said it and left!
　　 When passing by the workshop, Li Zexuan's heart moved, instead of going home directly, he raised his foot and walked towards the workshop.
　　 came to the workshop and asked about the location of Mo Lingwei, Li Zexuan came outside a "laboratory" in the workshop headquarters building, the door was left open, and Li Zexuan pushed in.
　　 I saw Mo Lingwei on the table, working on a strange-looking machine. 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. A spring clamp is fixed on both sides of the hole.
　　 From the appearance, it is basically a modern microscope of "beggar version"! I just don't know how the image quality is!
　　 I didn't expect this girl to have such a strong hands-on ability and so efficient in her work! You know, in this microscope, all those fine-tuning parts are fine-tuning with screws, and the workshop does not yet have a machine tool and does not have the conditions for batch processing of threads. All the screws used in it are processed by hand.
　　 Therefore, this microscope is absolutely unique, even if Mo Lingwei makes another one, she will not be able to do 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 say: "Miss Mo, is this a microscope?"
　　 "Ah~~!"
　　 Mo Lingwei was concentrating on adjusting the microscope, when she heard the sound behind her suddenly, she screamed, she almost didn't get scared to death!
　　 "Ah! Shanchang...you...you...how do you walk without a sound? Also, why don't you knock on the door? It scares 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 strangely.
Li Zexuan said with an innocent face: "Miss Mo, this door is still open, which door do I knock? Also, who said that I have no sound when I walk, and I did not deliberately control my feet. It is Ms. Mo that you are too focused, so I didn't hear it!"
Mo Lingwei hummed proudly, then bypassed the topic and replied: "This microscope has basically been assembled according to what you said, Shan Chang. At present, it is indeed possible to see some small things, but they still exist. I don’t understand two questions!"
　　 Li Zexuan curiously asked: "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!
　　"First of all, there is the problem of light source. Because the distance between the microscope objective lens and the observed object is very small, it is difficult for light to shine on the observed object, so the image seen through the eyepiece will be very dark and difficult to distinguish;
　　Second, what is the point of building a microscope so much? Is it just to see some small things clearly? But if you want to see those tiny things, just use a magnifying glass, so why bother? "
　　 Mo Lingwei frowned, very puzzled.
　　 I have to say that this girl’s optical attainments can definitely be regarded as entering the room. Now I am communicating with Li Zexuan and inadvertently said some "professional terminology", but I guess I can’t understand it when I look at it.
Li Zexuan smiled and replied, "Miss Mo, the first problem you found is not without a solution! First, you can use a set of fairy mirrors to reflect the sunlight outside the house or the candle light inside the house to the object. Up; Second, we can create a light source directly under the stage that carries the object under observation!"
　　 "Making the light source? How to make the light source? Don't you want to put a candle under it, Shanchang? No, the candle will blacken the lens!"
　　 Mo Lingwei said quickly.
Li Zexuan said a little bit amused: "Who said I would use candles as the 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 said strangely: "There is no smoke and dust? Don't you need to burn the light source, Shan Chang, you don't need to burn? But how can there be anything in this world that can emit light without burning? Shan Chang, please show me this light source!"
　　 At this moment, Mo Lingwei's interest in Li Zexuan's light source is far greater 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 said now!"
　　 The light source he said is actually a light bulb. Although he can't get the key material of the light bulb-tungsten wire, it can be replaced by other materials, such as carbonized bamboo wire!
　　 In 1854, Henry Goebbels used a charred bamboo filament, which was placed under a vacuum glass bottle to energize and glow. His invention today seems to be the first incandescent lamp with practical utility. The bulb he tested at that time had been able to last for four hundred hours, but later Edison's incandescent lamp made of tungsten filaments only cared about the life of about 1,000 hours.
　　 So before finding metal tungsten, it is a very good choice to use carbonized bamboo wire instead of tungsten wire!
Mo Lingwei listened to Li Zexuan's "blow" this kind of light source "blow" for so long, but at the end she said "not done yet". She usually respects Li Zexuan very much. At this moment, she can't help but turn to Li Zexuan. Big eyes, if she changed her mind, she would just start spraying: If you didn't make it, you said a fart to my old lady!
　　 "... Shan Chang, what about the second question?"
　　 Mo Lingwei took a deep breath, resisting the urge to curse, said.
　　 Li Zexuan smiled awkwardly, and said, "As for the second question, I actually asked Miss Mo to make a microscope to observe even smaller objects. It is difficult to see clearly with a magnifying glass alone!"
　　 Mo Lingwei questioned: "A smaller object? What is that? Is it because molecules or atoms are not made?"
　　 Now in the textbooks of "Physics" or "Chemistry" of Yanhuang Academy, there are only introductions about molecules and atoms, so it is not strange that Mo Lingwei can know molecules and atoms!
　　 It’s just that... this girl really dare to say that if you want to see atoms with a microscope, the requirements are too high!
　　 First of all, it is necessary to clarify that the size of atoms is about 0.1 nanometer (nm), while the general optical microscope, because the visible light source wavelength is distributed in 400-700 nanometers, is limited by the diffraction limit, and the resolution limit of the optical microscope can only be a few hundred nanometers. So if you want to see atoms with a microscope, you must use a super-resolution electron microscope.
　　 Judging from the current industrial base of Datang, let alone more than ten years, even if it is given to Datang for a hundred years, it is estimated that the technology has not developed to that level!
　　 "Miss Mo was joking. I was talking about smaller objects, 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, so he asked.
　　 Mo Lingwei thought for a while, and replied: "I roughly calculated that the magnification of this microscope is about 400 times!"
Li Zexuan nodded very satisfied when he heard the words. The world’s first super-magnification microscope made by Levin Hooke had a magnification of 270 times. This by Mo Lingwei has completely surpassed the column. Wen. Hook's two hundred and seventy times!
　　 "Haha! Very good! Four hundred times, it should barely work!"
　　 Li Zexuan laughed, then pretended to be mysterious: "Miss Mo, please follow the method I said before, and then improve the microscope, then I will show you something good!"
　　 Mo Lingwei was very curious, and said: "Mountain Chang, what good thing is it?"
　　 "Hey! This is temporarily kept secret!"
　　 Li Zexuan chuckled and refused to answer.
Mo Lingwei curled his lips very dissatisfied, and then changed a pitiful face, saying: "Shan Chang, look at me as a girl. I don’t learn poetry and etiquette, but work for you in the workshop every day. Is it easy for me to collect your wages? You still treat me like this~EbookFREE.me~ I don’t know how to pity you! Humph!"
Li Zexuan was an agitated spirit, and secretly said that this girl is really a savage dramatist, and it is estimated that only Yan Shaoning can surrender. He quickly waved his hand and said: "Cough cough! Girl Mo, I will tell you what I want to show you in a few days. It's also for nothing, because I haven't made that thing yet! But you really have contributed to making this microscope, but I am not a stingy person, and you will definitely be satisfied with the benefits that will be given to you at that time!"
　　 Mo Lingwei's eyes lit up, and she suddenly became energetic. She hurriedly asked, "What's the advantage? Shan Chang, can you talk about it?"
　　 Li Zexuan chuckled, and said, "Well, it's the benefit, it's to help you match up with Yan Shaoning! How about? How is this benefit?"
　　 "Yeah!"
　　 Mo Lingwei made a rare red face, and she groaned: "Who...who is going to marry him... Shan Chang, when will you help us matchmaking?"
"Ok?"
Li Zexuan looked dumbfounded and almost didn't turn this turn, "Ahem! As soon as possible! I'll bring this up to your father and Uncle Yan as soon as possible! Well...you are busy, I have something to do, so let's go! "
　　 Li Zexuan drove off quickly, he was afraid that if he stayed with this girl a little longer, his head would become abnormal!
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