Chapter 1295: Arbor Day!

The microscope is not a unique product of advanced industrial society. It was

polished entirely by hand in the beginning!

In 1590, two Dutch optical craftsmen and their father started experimenting

with lenses. They put some lenses in a circular tube, and an important

discovery was born. Objects near the bottom of the tube are magnified, and the

magnification is much higher than that of any single magnifying lens.

To a large extent, their first microscope can be considered an innovation and

cannot yet be used as a scientific instrument because the magnification is

only 9 times and the image is a little fuzzy.

The first real microscope in the world appeared in the late 17th century. The

inventor was Lewenhoek, a cloth merchant and pioneer of microscopes in the

Netherlands.

He grinds out a simple microscope, with only one lens, which can be held by

hand for observation. By grinding fine products in an innovative way,

Leeuwenhoek has achieved greater success than his contemporaries. He ground a

small glass ball into a lens, and the magnification reached 270 times. You

know, the magnification of other microscopes was only fifty times the highest.

He used this lens to make the world's first practical microscope.

At present, there is no shortage of artisans who can polish lenses in Li

Zexuan’s workshop. Mo Lingwei himself can also polish lenses. However, the

most difficult part of a lenticular microscope is not the lenses, but a series

of fine adjustment devices. Li Zexuan intends to imitate them. In the style of

Leewenhoek's microscope, a convex lens is connected to a metal holder with a

long screw, and the small displacement caused by the screw advancement is used

to perform the small focus during the microscope observation process!

Now 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.

"Shanchang, I understand what you mean! This microscope seems to be better

than an astronomical telescope~!"

A course on the principles and manufacturing process of microscopes 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, a microscope is simpler than

an astronomical telescope. After all, Miss Mo, you are very experienced in

polishing lenses now!"

When Mo Lingwei heard this, she immediately frowned and said, "Shanchang, it

takes a lot of effort to polish the lenses. Look at my hands. They were smooth

before, but now they are a bit rough. How can we marry someone in the future~?

I call Xiao Ningzi over to help me polish the lenses~?"

Looking at Mo Lingwei's slender hands, Li Zexuan was quite speechless. Where

is it rough? Aren’t you talking nonsense with your eyes open?

"Miss Mo, Shaoning has been busy building dams recently. Where does he have

time? But what you said...it's not unreasonable. Let's do this. In the future,

I will let someone make some skin-protecting babies, and I will give you some

How is it~?"

In other words, cucumber mask can not only apply on the face, but also on the

hands~?

Li Zexuan thought silently in his heart.

When Mo Lingwei heard this, his eyes brightened. Now everyone has a consensus

that it is produced by Li Zexuan and must be a boutique product. Although she

does not know what can protect the skin, it does not prevent her from ordering

a copy from Li Zexuan!

"Okay, okay! Shanchang! That's the deal!"

.................

Walking out of the workshop rather speechlessly, Li Zexuan slandered in his

heart. If Yan Shaoning marries Mo Lingwei home, it is estimated that the Yan

family will be lively in the future!

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

"Msang Gong, Daddy has a letter~!"

Back to Yunshan Courtyard, Han Yuxi greeted him as soon as he entered the

courtyard gate, and said with a smile on his face.

"Oh~? What does the father-in-law's letter say? How is he doing there~?"

Li Zexuan grabbed his wife's slender waist and asked with a smile.

Han Yuxi did not break free, so she gave up. She turned to look at Li Zexuan

and replied: "Daddy said he bought three Zhuangzi over there, and he has dug

the sewage treatment pond near the mine, and it is now in use. He asked

someone to buy a lot of quyuan ploughs from the workshop and rent them for

free to the people who don’t have ploughs. Now the spring ploughing there has

started for several days!

Dad also asked the people to drink boiled water. He said that if anyone found

out who was drinking raw water, his rent would increase by half in the future.

Now Dad’s several villagers are the most popular ones in Yifang County! The

magistrate Wang of Yifang County praised it many times! Oh, Dad also asked

Xiang Gong in the letter, now that the cesspool is set up and the water

quality of the river next to Zhuangzi has also improved, what else should be

done~? "

Li Zexuan nodded slightly, and it seemed that Han Tianhu wanted to move

Hanjiazhuang’s previous development model over there! After pondering for a

moment, he said:

"Now that you have 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 clean, but the air you breathe will 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

Lanhe, Lanyi River, and Weifen River. The rich water resources mean that food

can be grown, so the people in this river basin Life is very happy. 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 of the end of Tang Dynasty, this land of the Loess Plateau will

experience very serious soil erosion, resulting in water pollution or even

depletion. At that time, this land will no longer be suitable. Living on the

land, China’s political and economic center will gradually move south!

The most direct and effective way to control 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 now the world’s largest super city ~www.mtlnovel.com~ with a

population of one million, more than two million in its peak period. Don’t

look at the “eight waters around Chang'an” now. Behind the prosperity of

Chang'an City is its natural resources The serious overdraft with the

ecological environment is destined to not last long!

Modern Xi’an has always been “warm but not hot” in all the capital cities of

the country. A very important reason is the lack of water resources. Yes,

modern Xi’an is short of water. The Tang Dynasty’s “eight waters around

Chang'an”, In modern times, there is no water. If there is no Heihe water

diversion project, Xi'an 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", then the tree-planting and

protection forest project must start now!

Han Tianhu's letter gave Li Zexuan the idea of promoting the Arbor Day in

the Tang Dynasty!

If the momentum is built well, maybe it's really possible! The main thing is

to think about how to convince Li Er!

...................

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