The Three Thousand Battalion is the imperial army that guards the capital. The literacy rate is slightly better. At least most of the soldiers can write their own names, so they can barely pass the first level.
But in the future, military strategy, talent, learning, and virtue are the real barriers that separate ordinary people from talents.
Chen Kan stepped down from the general platform, and Fang Xu took over the command.
After filtering out some soldiers who couldn't even write their names, they started the big battle mode directly.
Since the strongest one needs to be selected, the battle mode is naturally the best way to screen talents.
Although this will cause some soldiers with low force value but good brains to be eliminated early, this era has never been fair.
The first phase of the Navy Academy plans to enroll 6,000 people. The Ming Dynasty's army has 800,000 people instead of 1 million. It is unfair to select 6,000 people among hundreds of thousands of people.
Because the commander of the Three Thousand Battalion is Chen Kan, and the Navy Academy was also proposed by him, being able to give him 100 places is already considered a favor given to Chen Kan by Zhu Neng.
That's right, the commander of the Naval Academy is none other than Zhu Neng, who has resigned from the post of generalissimo since Annan returned to the court.
Zhu Neng used a hundred places to end Chen Kanxian's friendship with Ping'an Nanzhi.
Although Ping'an Nan's first contribution was still made by Chen Kan, how he was rewarded was a matter for the court and had nothing to do with him, Zhu Neng, and he, Zhu Neng, no longer owed Chen Kan anything.
It is worth mentioning that Sheng Yong finally got his wish and left a reputation for thousands of years. When he captured Thang Long City, he took the lead and led the army to attack the city, and finally died under Thang Long City.
Zhu Di thought about his feelings for a while, but in the end he did not kill all the family members of Marquis Licheng, but just took back Sheng Yong's title.
It was not difficult to select one hundred people out of four thousand, and it was even faster than anyone expected.
In just half an hour, only the strongest 100 people were left in the field.
Without him, everyone wants this kind of opportunity to reach the sky in one step, and naturally no one will hold back if he takes action.
When everyone is playing hard, the winner will naturally be determined quickly.
The one hundred people standing in the teaching field were very satisfied, while the other soldiers were lying on the ground rolling around in pain.
Of course, everyone is in charge of life and death after all, so no one sticks to it.
The injured soldiers only need to rest for a few days to recover as before.
Chen Kan paid traveling expenses to the 100 people standing in the teaching field, gave them identity tags, and let them go on their way.
Chen Kan had to stay in Beijing to wait for news, so naturally it was impossible for him to go with them. The soldiers didn't say anything more. After receiving the travel expenses and identity tags, they packed up their clothes and went south together.
Except for a change of clothes, they couldn't take anything away. Whether it was war horses or weapons and armor, they all belonged to the Three Thousand Battalion. They no longer belonged to the Three Thousand Battalion, so naturally they couldn't take them away.
After settling the matters in the military camp, Chen Kan rode back to the Hou Mansion.
Today he and the three little guys made an appointment to burn paper and glass to make a microscope, so naturally he couldn't miss the appointment.
"Drive~"
Chen Kan drove the war horse very fast, but the direction it went was not the Marquis Mansion, but the cement factory where cement was fired.
Glazed glass, also known as glass, is composed of silicon in sand. It still needs to be calcined at high temperatures to form.
In the past, Chen Kan felt that burning paper and glass was too troublesome, so he never bothered to do it.
But now it is impossible not to burn. The three little guys have caught up with their studies, and the microscope is an indispensable tool for observing natural science.
If I want to continue teaching them, I can no longer put off doing it.
The Ming Dynasty also had a method of firing colored glaze, but Chen Kan felt that its quality was only better than the crystal dug out of the cave. The transparency was too low and there were too many impurities, making it impossible to polish it to the precision he wanted.
From a distance, he saw the large chimneys of the cement factory billowing thick smoke, and Chen Kan could already smell the smell of lime.
Chen Kan crossed the cement factory and headed straight for a new cave dwelling.
The cave dwellings are made of red bricks and cement, so there is no need to worry about the risk of the kiln exploding.
Zhu Zhanji, Hua Shi, and Zhu Zhanhe, three little kids, accompanied by craftsmen, had been waiting in front of the cave dwelling early.
Seeing that Chen Kan was finally late, the three little guys immediately came to greet him.
"Teacher, you are here."
"Um!"
Chen Kan nodded, and without too much nonsense, he asked directly: "Are you ready for what the master asked you to prepare?"
The three little guys nodded, and then pulled Chen Kan to a pile of tools.
Scales, stone mills, iron tongs, grinding mills, crucibles made of clay, a pile of quartz sand that fluoresces in the sun, a pile of soda ash, and a pile of corals in poor condition.
There is also a large pile of burnt coke.
This is what Chen Kan asked them to prepare.
The raw materials needed to make glass are very simple. Quartz sand, which is the main material of glass, silicon, soda ash plays the role of sodium carbonate, and coral is calcium carbonate. Originally, natural marble was better for calcium carbonate, but for a while After a while, he couldn't find it, so Chen Kan used coral instead.
Chen Kan didn't know the specific proportions of the three things, so he needed to experiment again and again.
But Chen Kan was certain that with the raw materials he prepared, even if the proportions were wrong, the quality of the glass produced would definitely be better than that of Daming.
Because Chen Kan once visited the kilns where paper glass was burned in the Ming Dynasty, they were still using eggshells instead of calcium carbonate.
Now that the tools are ready, let's start working.
Chen Kan put some diamond-like quartz sand into the stone mill and started grinding it, while the three little guys took out small notebooks and charcoal pens and started recording.
How much of what was added, what was burned, and what the ratio was. These were all things they needed to record during this experiment.
After studying with Chen Kan for so long, the three little guys have deeply understood the importance of data.
After grinding quartz sand, grind alkali and coral.
These raw materials need to be ground into powder.
The raw materials ground by the stone mill were not fine enough. After Zhu Zhanji passed the raw materials through a sieve, he poured the coarser particles in the sieve into a mortar and continued grinding with an iron pestle.
Then, Hua Shi and Zhu Zhanhe took over the matter of recording data.
Less than half an hour later, three more bottles of powder appeared in front of several people.
Chen Kan ordered the craftsmen on the side to start lighting a fire, and then took three little guys to mix the three powders with water in different proportions.
The three little guys were also asked to mark the clay pots containing the mixed powder, so that they could easily identify which pot of experimental products contained what proportions.
The coke was quickly ignited, and more than a dozen clay pots appeared in front of Chen Kan and the three little guys.
Fix the pottery pot with iron tongs and put it into the fire through the hole in the kiln's waist. The firing process has officially begun.
After doing all this, Chen Kan wiped the sweat from his forehead, sat down and started waiting.
The coke of this era was not pure, so it did not burn very well, and it was even more difficult to reach a high temperature of several thousand degrees.
So if you want the materials in the clay pot to melt into glass water, you need to wait for a long time.
The craftsman was naked and blew the bellows into the cave dwelling loudly.
The gradually rising temperature caused the craftsman to shed large drops of sweat, but he still worked hard to pump the bellows.
The three little guys couldn't sit still. The observation port coming out of the cave kept staring at the changes in the pots in the cave, and from time to time they would record something in the notebook.
Chen Kan was far away from the cave, not because he was worried about the cave exploding. It didn't rain or snow this season, so the possibility of the cave exploding was unlikely. The main reason was that the area close to the cave was too hot.
The guards brought a small table and set rice wine and candied dried fruits for Chen Kan. Chen Kan lay down on the rocking chair and closed his eyes to rest.
A mouthful of candied fruit, a mouthful of dried fruit, and rice wine as a gift. On this day, even the emperor wouldn't exchange it.
It would be even more perfect if there were no shouts and exclamations of surprise from the three little guys.
Chen Kan lay on the recliner for a long time, fighting against the tide of sleepiness, when Zhu Zhanji's whirring voice suddenly came.
"It's melted, it's melted on my forehead, teacher, the powder in the clay pot has melted."
The sound came from far to near, making Chen Kan unable to sleep.
Chen Kan sat up and scolded: "If it melts, it will melt. What are you talking about?"
Zhu Zhanji was very used to Chen Kan's scolding, so he didn't feel any fear. He immediately leaned into Chen Kan's ear and asked: "Teacher, when can you leave the kiln after being transformed?"
Chen Kan waved his hand impatiently and said: "Keep watching. When you see that the sand in the crucible has completely turned into water, and there are no black spots and impurities in it, you can take it out to cool down naturally."
"Oh, got it!"
Zhu Zhanji responded, and Chen Kan lay down again.
This time he failed to overcome the tide of sleepiness.
After a while, the sound of Chen Kan sleeping soundly came from the recliner.
Half asleep and half awake, Chen Kan no longer heard the snoring sounds of the three little guys. He didn't know how long he had been sleeping, but Chen Kan was about to turn over and change his position to continue sleeping.
"Bang~"
A deafening explosion suddenly sounded in Chen Kan's ears.
"Fuck!"
Chen Kan was so frightened that he burst out of his national quintessence and jumped up from the recliner.
"What's the matter? The kiln exploded?"
Chen Kan was still a little confused when he heard a noise coming from not far away.
"Save people, save people quickly."
The exclamation did not belong to any of the three little guys, but seemed to be the craftsmen who rushed to help.
Chen Kan hurriedly ran towards the direction of the explosion: "What's wrong? What happened?"
Hearing Chen Kan's voice, the crowd from three levels inside and three levels outside made way for him.
Chen Kan walked all the way to the source of the explosion, and his face suddenly darkened. A craftsman was sitting on the ground covered in blood, while three little guys stood beside him helplessly.
The other two craftsmen were cleaning the glass fragments from the bloody craftsman.
Chen Kan glared at the three little guys fiercely: "Didn't I tell you to cool down naturally? Who told you to use cold water?"
After scolding the three of them, Chen Kan hurriedly came to the craftsman: "How are you? It's nothing serious, right?"
The craftsman smiled honestly: "Master Hou, it doesn't matter, it's just a superficial injury."
