Otaku Engineer in Great Tang Dynasty

Remember in one second [End of the God Station] Mobile phone user input address: m.xinwanben.com

Microscopes are not unique products of advanced industrial society. In the beginning, they were completely polished by hand!

In 1590, two Dutch eyeglass craftsmen and their father began experimenting with making microscopes out of lenses. They put some lenses into circular tubes, and an important discovery was made. Objects near the bottom of the tube are magnified, and much more than any single-magnification lens.

For the most part, their first microscope can be considered an innovation, not yet usable as a scientific instrument because the magnification was only 9x and the images were somewhat blurry.

The world's first microscope in the true sense appeared in the late 17th century. The inventor was the Dutch cloth merchant and pioneer of the microscope, Leeuwenhoek.

He made a simple microscope himself, with only one lens, which could be held by hand for observation. By grinding lenses in innovative ways, Leeuwenhoek achieved more than his contemporaries. He ground a small glass ball into a lens, and the magnification has reached 270 times. You know, other microscopes at that time had a maximum magnification of only fifty times. He used this lens to make the world's first practical microscope.

At present, there are many craftsmen who can polish lenses in Li Zexuan's workshop. Mo Lingwei also polishes lenses. However, the most difficult part of a biconvex microscope is not the lens, but a series of fine adjustment devices. Li Zexuan intends to imitate it. In Leeuwenhoek's microscope style, a convex mirror is connected to a metal holder with a long screw, and the tiny displacement generated by screw advancement is used to perform tiny focusing during microscope observation!

At present, there is no machine tool in the workshop, and the screws used need to be polished and carved by hand, which is relatively time-consuming.

"Master, I understand what you mean! This microscope should be better than an astronomical telescope~!"

A course on microscope principles and manufacturing technology lasted for nearly an hour. The small blackboard was full of light path diagrams and formulas. At this time, Mo Lingwei said excitedly.

Li Zexuan nodded slightly and said, "In general, microscopes are simpler than astronomical telescopes. After all, Miss Mo, you are already very experienced in polishing lenses now!"

When Mo Lingwei heard this, she immediately frowned and said: "Shan Chang, this lens polishing is very labor-intensive. Look at my hands, they used to be smooth before, but now they are a little rough, how can I get married in the future~? I'll call Xiao Ningzi to come and help me polish the lens~?"

Looking at Mo Lingwei's slender and flawless hands, Li Zexuan was quite speechless, where is this rough? Aren't you talking nonsense with your eyes open?

"Miss Mo, Shao Ning has been busy building the dam recently, where does he have time? But what you said is... not unreasonable, so let me make some babies to protect the skin in the future, and I will give you some when the time comes. How are you~?"

In other words, the cucumber mask can not only be applied to the face, but it should also be applied to the hands~?

Li Zexuan thought silently in his heart.

Mo Lingwei's eyes lit up when she heard it. Now everyone agrees that Li Zexuan's product must be a high-quality product. Although she doesn't know what can protect her skin, it doesn't prevent her from booking a copy from Li Zexuan first!

"Okay, okay! Chief! That's it!"

. . . . . .

Reluctantly walked out of the workshop, Li Zexuan scolded in his heart, if Yan Shaoning married Mo Lingwei back home, it is estimated that the Yan family would be lively after going up and down!

This girl is lively and interesting, but sometimes very noisy~!

"Xianggong, Daddy has written a letter~!"

Back at the Yunshan Courtyard, Han Yuxi greeted him as soon as he entered the courtyard, and said with a happy face.

"Oh~? What did my father-in-law say in the letter? How was he doing there~?"

Li Zexuan hugged his daughter-in-law's slender waist and asked with a smile.

Han Yuxi struggled and didn't break free, so she gave up, she turned her head to look at Li Zexuan, and replied, "Dad said he bought three villages over there, and he has dug the sewage treatment tank near the mine, and it is now in use. He entrusted someone to buy a lot of curved ploughs from the workshop, and rented them for free to the people who did not have ploughs. Now the spring ploughing has started there for several days!

Daddy also asked all the people to drink boiled water, saying that whoever finds out who drinks raw water will have a 50% increase in rent in the future. Now Daddy's few villagers are the most favorite villagers in Yifang County to drink boiled water! The magistrate Wang of Yifang County has praised it many times! Oh, in the letter, Daddy also asked the husband, now that the sewage pool is completed, and the water quality of the river next to Zhuangzishang has also improved, what else should be done~? "

Li Zexuan nodded slightly, it seemed that Han Tianhu was over there trying to move the previous development model of Hanjiazhuang over there! After pondering for a moment, he said:

"Since there is a cesspool, the next step is to plant trees! Plant trees next to the river. Once there are more trees, not only will the water in the river become cleaner, but the air you breathe will also become fresh!"

Lanzhou is rich in water resources. Not only does the Yellow River flow through the western part of Lanzhou, but there are also small rivers such as the Lan River, Lanyi River, and Weifen River in its territory. The people live very happily, and it is for this reason that the political and economic centers of the dynasties before the Song Dynasty were all in the north!

However, after the population expansion of the Sui and Tang dynasties and the wars in the late Tang Dynasty, this piece of land on the Loess Plateau will experience severe soil erosion, resulting in water pollution and even depletion. At that time, this piece of land will no longer be suitable for Living in land, China's political and economic center will gradually move south!

Governance

The most direct and effective method for soil erosion and water pollution is to plant trees, not only in Yifang County, Li Zexuan also wants to suggest Li Er to plant trees on a large scale in the waters near Chang'an.

Chang'an is the largest super city in the world today, with a population of one million. At its peak, the population exceeded two million. Don't look at the current "eight waters surrounding Chang'an". Behind the apparent prosperity of Chang'an City is a serious overdraft of natural resources and ecological environment. , destined to not last long!

Modern Xi'an has always been "warm but not hot" in all the provincial capital cities in the country. A very important reason is the lack of water resources. Yes, modern Xi'an is very short of water. In the Tang Dynasty, "eight waters surround Chang'an", In modern times, there is no water left. If there is no Heihe Diversion Project, Xi'an City does not know what will happen.

If Datang wants to stand on top of the world forever, and if Chang'an City wants to continue to prosper and "expand", the tree planting and shelter forest project must start now!

Han Tianhu's letter gave Li Zexuan the idea of ​​implementing the Arbor Day in Tang Dynasty!

If the momentum is good, maybe it really can! The main thing is to think about how to convince Li Er!

. . . . . . .

Support (end this site) and share this site with those who need it! Can't find the book, please leave a message!