The construction process of a dam was generally divided into three steps:
First, cutting off the flow: Dig one or several tunnels or channels in the natural river, then cut off the river so that the water flows downstream through the diversion holes or channels.
Second, excavating the foundation pit: The dam also needed a stable geological structure to be built, so the sediment on the river had to be dug out, and the embankments (like door frames) on both sides had to be dug out until the bedrock was exposed.
Third, filling the dam body: Fill the dam body according to the type of dam (concrete dam, rockfill dam, etc.) until the top was capped.
Now, the Ba River Dam was in the second step. Under Li Zexuan's command, concrete pillars wrapped in steel bars were inserted into the foundation pit that had been dug in advance. The riverbed of the Ba River was suddenly filled with "dang dang dang" hammering sounds!
After the reinforced concrete pillars were inserted into the riverbed, the next step was to use cement to fill the dam body below. Relatively speaking, this was not difficult, so Li Zexuan watched for half an hour, then said goodbye to Mo Huai and the others and left!
When he passed by the workshop, Li Zexuan's heart skipped a beat. He did not go home directly, but walked toward the workshop.
When he arrived at the workshop, he asked for Mo Lingwei's location. Li Zexuan went to a "laboratory" in the headquarters building of the workshop. The door was not closed, just left open. Li Zexuan walked in directly.
Mo Lingwei was fiddling with a strange looking machine on the table. The top of the machine was a cylinder with many rotating mechanisms in the middle. Below the rotating mechanism was another cylinder, and below the cylinder was a square table. There was a square hole in the middle of the table, and a spring clamp was fixed on both sides of the hole.
From the appearance, it was basically a "beggar's version" of a modern microscope! He just did not know how good the image quality was!
Li Zexuan didn't expect this girl to be so capable and efficient in getting things done! The fine-tuning parts of the microscope were all fine-tuned with screws. The workshop didn't have a machine tool yet, so they couldn't process the screws in batches. The screws used in the microscope were all processed by hand.
Therefore, this microscope was definitely one of a kind in the world. Even Mo Lingwei herself could not make a microscope that was exactly the same as this one.
This also meant that although one microscope had been manufactured, it could not be mass-produced.
Li Zexuan looked at the microscope on the table and couldn't help but ask, "Ink Girl made a microscope?"
"Ah ~ ~!"
Mo Lingwei was focused on adjusting the microscope when she suddenly heard the sound behind her. She screamed and was almost scared to death!
"Ah! Yamachō … You … You … Why don't you make any sound when you walk? Also, why didn't you knock? You scared me to death! "
Mo Lingwei turned around and saw that the person who spoke was Li Zexuan. She rolled her eyes and blamed him.
Li Zexuan said innocently, "Ink Girl, the door wasn't closed. Why would I knock? Also, who said that I don't make any sound when I walk? I didn't deliberately control my feet. Ink Girl, you were too focused, so you didn't hear it! "
Mo Lingwei proudly snorted and avoided the topic. She replied, "This microscope has basically been assembled according to Yamachō's instructions. Currently, it can see some small things, but there are still two problems that I don't understand!"
Li Zexuan curiously asked, "What are the problems?"
Logically speaking, Mo Lingwei's practical ability in engineering was unparalleled in the entire Yanhuang College. Therefore, Li Zexuan was also very curious about the problems she encountered!
"First, there's the problem of the light source. Because the distance between the objective lens and the object being observed is very small, it's difficult for the light to shine on the object being observed. Therefore, the image seen through the eyepiece is very dark and difficult to distinguish.
Second, what's the point of going through so much trouble to build the microscope? Is it just to see some small things? But if you want to see those small things, you can just use a magnifying glass. Why bother? "
Mo Lingwei frowned and was very puzzled.
It had to be said that this girl's attainments in the field of optics were definitely at a higher level. Now that she was conversing with Li Zexuan, she had inadvertently used some "professional terms". If it were anyone else, they probably wouldn't be able to understand it.
Li Zexuan smiled and replied, "Miss Mo, it's not that there's no solution to the first problem you discovered! First, you can use a set of Immortal Mirrors to guide the sunlight from outside the house or the candlelight from inside the house and reflect it onto the object. Second, we can directly create a light source under the stage that supports the object being observed! "
"Create a light source? How do you create a light source? Yamachō, are you going to put a candle under it? That won't do. The candle will smoke the lens! "
Mo Lingwei quickly said.
Li Zexuan was a little amused and said, "Who said I'm going to use a candle as a light source? Don't worry, the light source I'm talking about will definitely not produce any smoke when it shines. Moreover, the light it emits will be several times brighter than the light from a candle! "
Mo Lingwei curiously asked, "No smoke? Yamachō, is it possible that this light source doesn't need to be burned to emit light? But how can there be something in this world that can emit light without burning? Yamachō, quickly take out this light source and let me take a look! "
At this moment, Mo Lingwei's interest in Li Zexuan's light source was far greater than the microscope itself.
Li Zexuan touched his nose and coughed dryly, "Ahem! Ink Girl, this light source hasn't been made yet, so you should use the first method I mentioned! "
The light source he was talking about was actually a light bulb. Although he couldn't get the key material for light bulbs, tungsten wire, he could use other materials to replace it, such as carbonized bamboo wire!
In 1854, Henry Goebbels used a piece of carbonized bamboo wire and placed it under a vacuum glass bottle to emit light. Today, his invention seemed to be the first practical incandescent light bulb. The light bulb he tested at that time could last for 400 hours. Later, Edison used tungsten wire to make incandescent light bulbs, which could only last for about a thousand hours.
Therefore, before finding tungsten metal, using carbonized bamboo wire to replace tungsten wire was a very good choice!
Mo Lingwei listened to Li Zexuan "bragging" about this light source for so long, but in the end, he said "it hasn't been made yet". Even though she usually respected Li Zexuan very much, she couldn't help but roll her eyes at Li Zexuan. If it was someone else, she would probably have directly scolded: If you haven't made it yet, why are you talking to me!
"… Yamachō, what about the second question?"
Mo Lingwei took a deep breath. She resisted the urge to scold him and said.
Li Zexuan smiled a little awkwardly and said, "As for the second question, actually, I asked Ink Girl to make a microscope to observe smaller objects. It's hard to see clearly with just a magnifying glass!"
Mo Lingwei was puzzled, "Smaller objects? What are they? Could it be a molecule or an atom? "
In Yanhuang College's "Physics" and "Chemistry" textbooks, there were only introductions about molecules and atoms. Therefore, it wasn't strange that Mo Lingwei knew about molecules and atoms!
But … this girl really dared to say that she wanted to use a microscope to observe atoms. This requirement was too high!
First, it had to be clear that the size of atoms was around 0.1 nanometers (nm). A normal optical microscope's wavelength distribution was between 400 and 700 nm, which was limited by the diffraction limit. The optical microscope's resolution limit was only a few hundred nm. Therefore, if one wanted to use a microscope to observe atoms, they had to use a super resolution electron microscope.
With Tang Dynasty's current industrial foundation, let alone a decade, even if Tang Dynasty was given a hundred years, its technology wouldn't be able to reach that level!
"Ink Girl, you're joking. I'm talking about smaller objects, not atoms. Oh, right, Ink Girl, have you calculated the magnification of this microscope? "
Li Zexuan suddenly thought of a very important question, so he asked.
Mo Lingwei thought for a moment and replied, "I've roughly calculated that this microscope's magnification is about 400 times!"
Li Zexuan heard this and nodded in satisfaction. In his previous life, Levin Hooker made the world's first super magnification microscope, which had a magnification of 270 times. Mo Lingwei's microscope had completely surpassed Levin Hooker's by 270 times!
"Haha! Very good! Four hundred times, it should be barely usable! "
Li Zexuan laughed and then pretended to be mysterious, "Ink Girl, follow my previous method and improve the microscope. When the time comes, I'll show you something good!"
Mo Lingwei was very curious and asked, "Yamachō, what is it?"
"Hehe! This is a secret for now! "
Li Zexuan chuckled and did not answer.
Mo Lingwei curled her lips in dissatisfaction and then put on a pitiful expression and said, "Yamachō, look at me, a girl. I don't study etiquette, but I work for you in the workshop every day and don't even receive a salary from you. Do you think it's easy for me? You still treat me like this, you don't know how to treat a girl well! Hmph! "
Li Zexuan quivered and thought that this girl was really a spoiled actress. He guessed that only Yan Shaoning could tame her. He quickly waved his hand and said, "Ahem! Ink Girl, about what I'm going to show you in a few days, it's useless to say it now because I haven't made it yet! However, you did play a big part in making this microscope, but I'm not a stingy person. When the time comes, I'll give you some benefits and you'll definitely be satisfied! "
Mo Lingwei's eyes lit up and she immediately became spirited. She quickly asked, "What benefits? Yamachō, hurry up and tell me! "
Li Zexuan chuckled and said, "The benefits are that I'll be your matchmaker with Yan Shaoning! How about it? How's this benefit? "
"Ah!"
Mo Lingwei blushed and said angrily, "Who … who wants to marry him … Yamachō, when are you going to be our matchmaker?"
"Huh?"
Li Zexuan was dumbfounded. He almost didn't get it. "Cough cough! As soon as possible! I'll mention this to your father and Uncle Yan as soon as possible! Erm … you go ahead with your work, I still have something to do, so I'll leave first! "
Li Zexuan quickly left. He was afraid that if he stayed with this girl any longer, his brain would become abnormal!
…
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