Chapter 427 Crystal Plate (Please vote and subscribe)
"Mercy for the Peasants" Luo Chong [Han Dynasty]
Hoeing the field at noon, sweat dripping down to the ground, who knows that every grain of rice on the plate is the result of hard work.
Must-know new words: 禾,日,当,午,汗,下,土,中,知,苦.
Homework: Master the new words and recite the text.
"春晓" Luo Chong [Han Dynasty]
I slept through the spring without knowing the dawn, and heard birds singing everywhere. There was wind and rain at night, and I wonder how many flowers have fallen?
Must-know new words:
"Ode to the Goose" Luo Chong; "Ode to the Willow" Luo Chong; "风" Luo Chong, knowing how to wither in the third autumn night, can bloom in February; "古原草" Luo Chong, the grass on the plain is withered and flourishing every year, wildfires cannot burn it all, spring breeze blows and it grows again. "Song of the Wandering Son" Luo Chong, the loving mother's hand line
In the classroom, the students are practicing the new words they learned today, and Luo Chong, the teacher, is not idle. After teaching dozens of words today, he began to write furiously on the podium, scratching the back of his head and thinking about something, and then started writing again. Editing
textbooks is not an easy job. Ahem, although he copied them all, he had to copy them selectively, just like the ancient poems above, which cannot have historical figures, historical places, or historical events. They are all poems describing the scenery, all things in nature, and praising family affection and teaching people to understand filial piety. Otherwise, you write
"Climbing the Stork Tower", which poem is simple, the sun sets behind the mountains, and the Yellow River flows into the sea, but how do you explain it when you teach it? At that time, a group of children will chase the teacher and ask, "Teacher, which river is the Yellow River, what is the sea, how do you say this?" "Looking at the Waterfall
at Mount Lushan" is even more impossible to explain. Let alone where Mount Lushan is, there is not even a waterfall around the Han tribe, and it will be even more impossible to explain it at that time.
Luo Chong racked his brains to recall the ancient poems he had learned, and then he had to find those with simple characters and easy to learn, and finally compile them into textbooks. This was really a boring and tedious task, but fortunately at this moment, a sudden knock on the door saved Luo Chong.
"Come in."
"Chief, the mold you want is ready. I brought it here. Can you take a look?"
The door of the classroom opened, and Big Mouth came in with two golden plate-like objects and handed them to Luo Chong's podium.
Luo Chong picked them up and looked at them. Just like the drawings he gave, the concave parts of the plates were carefully polished with sand and stone, and then wiped with white wax. They were extremely dazzling in the sunlight coming in from the window.
Moreover, the two plates were not round, but square, with a circular depression in the middle, which was used to hold the glass liquid, but there was a hole at each of its four corners, where a few small wooden sticks could be inserted to fix the two halves of the mold, so that it would not easily deviate when the mold was pressed.
"Chief, will this work?" Seeing that Luo Chong didn't say anything, Da Zui asked again.
"Well, it should be about the same. Let's try it first. I don't think it will be a big problem.
Well, you can practice calligraphy on your own for the rest of the class. I'm going to go out for a while. Oh, by the way, tomorrow I'm going to dictate the words we learned to you. If you make a mistake, you have to write it down a hundred times."
Dictation? ! A hundred times for a mistake? ! Damn!
Originally, some students couldn't help wanting to be lazy when they saw that Teacher Luo was going out. However, when they heard that they had to dictate words tomorrow and the punishment of writing a hundred times, the whole class couldn't help but feel their hair stand on end. They all lowered their heads and began to practice calligraphy seriously. No one stared at Luo Chong anymore.
******
"Chief, what is this used for? If we cast copper or iron, we can't use metal as molds, right?" Da Zui followed Luo Chong out of the teaching building and asked as he walked towards Luo Chong's home.
"Who told you that you can't use metal molds for casting metal? Aren't you afraid that the mold and the metal will stick together, so you put a layer of mud on them to separate them?" Luo Chong reminded immediately.
"Oh!? Yes, yes, I didn't think of it just now, hehehe." Da Zui said with an "oh" in sudden enlightenment.
"Well, there is one thing you need to pay special attention to when casting with metal molds, that is, you must dry the mud, otherwise the metal solution will release a lot of water vapor when it touches the wet mud, which will produce bubbles in the molten metal and affect the quality of the finished product." Luo Chong explained to Da Zui as they walked.
"Oh, I remember. Thank you for teaching me, Chief."
Big Mouth also thanked Luo Chong with great gratitude. In the past two years, Big Mouth was entrusted by Luo Chong to be in charge of all the work of metal smelting and casting in the Han tribe. He knew that the rise of the Han tribe today was all related to metal tools. Luo Chong gave him such an important task and taught him so many techniques. Even his wife was found by Luo Chong at the Spring Festival. Now even his children can call him dad. He naturally remembers this favor in his heart.
"You don't need to thank me. Just do your best. Also, how are the apprentices under you being trained? We may have to build one or two more smelters and processing plants this year. How many people can you spare at that time?" Luo Chong waved his hand indifferently and asked about the apprentices instead.
"Chief, are we going to refine those two types of lead and silver mines? If so, I can still transfer about 15 people, all of whom have participated in all the processes of iron smelting." Big Mouth replied quickly.
"Well, 15 people should be enough. Let them be the technical backbone, and add a group of apprentices. You go back and pay attention first, pick out the people in advance, and transfer them directly when the time comes." Luo Chong thought for a while and said.
"Yes, I understand, leader. Then is this mold we made this time used to test lead and silver?" Da Zui guessed.
"The stone refined this time is not metal, but another thing, with a lower melting point than copper and iron, called glass."
"Glass!?"
Da Zui was stunned when he heard this new term, and looked at the mold in his hand again, wondering.
"Then what is this glass plate with a thick middle and thin edges used for? This shape can't hold anything, it's definitely not a container."
"It's indeed not a container, it's a tool. You will know when the time comes. We can make it today."
The two of them had already arrived at Luo Chong's house while talking, and took out several pure and colorless crystal clusters from the side room that Luo Chong used as a study.
"Wow! Is this also ore?! How come it looks as transparent as water, and the shape is like a gun head? Chief, is this the ore of glass?!"
It was the first time that Big Mouth had seen this pure and colorless crystal. When Giant Eagle first sent it over, only a few people saw it, and then Luo Chong put it in the drawer of the desk.
"This is indeed an ore, but it cannot be called a glass ore. This is a crystal ore. Judging from the shape and color, colorless and transparent, the sword-shaped one is crystal. You can understand it as a crystal that is as transparent as water. Of course, there are other shapes, but its crystal is this sword-shaped.
In addition, crystal can be used to make glass, but it is not refined, but just melted and reshaped. To put it bluntly, it is to change the shape of the crystal, but it is just crystal processed by humans.
Real glass can actually be burned out with other materials, and it can achieve a transparency similar to that of crystal. I originally wanted to use glass to make windows, but I haven't found the right raw materials yet, so I can only make do with oil paper now." Luo Chong handed a crystal cluster to Big Mouth, and then introduced it in detail.
(End of this chapter)
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