Chapter 567: Good stuff keeps on

Zhang Han was taken down like a dead dog, and the next inventor went on to play.

This new Lei Jianping display is not an invention, but an idea.

He improved the way of delivering letters and proposed the concept of envelopes.

Current correspondence is only suitable for celebrities, because celebrities and identity recipients are easy to find.

For the unnamed, or those who have no fixed place, it is actually very difficult for the postman to deliver the letters in a timely and accurate manner.

These unknown people often need to rely on acquaintances to help deliver letters.

If you don't have an acquaintance to travel far, it will be all right.

Lei Jianping’s current design concept is a unified way of delivering letters, allowing ordinary people to use the post.

The sender is required to indicate the name of the recipient on the envelope, as well as various detailed introductions, interpersonal relationships, detailed residential or work locations, and recipients.

In this way, it is convenient for the postman to find a stranger from multiple dimensions, which can increase the success rate and reduce the time to find someone.

Even for some specific places, mailboxes for collective use can be set up.

For example, in famous places like Nanjing Xuanwu Street and Qinhuaihe Street, mailboxes can be set up.

When others send letters to people who live on Xuanwu Street, they only need to indicate the address on Xuanwu Street. The postman will deliver the letter to Xuanwu Street, and the local person in charge will deliver the letter to the next level.

The locals are naturally more familiar with the residents on the street.

There are many similar methods, in short, they are trying to improve the convenience of letter delivery as much as possible.

At the same time, in order to maintain this operation, a fee must be charged for the delivery of letters.

In this way, you can get rid of the dependence on acquaintances in sending letters in the past, and make communication between two ordinary people possible.

This idea is not a whimsical idea, and it doesn't give people an amazing feeling.

However, in actual use, there is still a certain positive significance.

The complete disappearance of the correspondence requires at least to wait until there is a mobile phone text message.

In the future, whether it is a wired telegram or a wireless telegraph, it will be used to convey important information. Ordinary people will not send a telegram for a family letter, so it is not so luxurious.

Before that, ordinary people would have a long-term demand for letters.

Wu Changqing gave a hum, expressing his approval of this idea.

Afterwards, officials from the Ministry of Households can be arranged to provide some cooperation, and then this new way of sending letters will be implemented throughout the country to increase the exchange of information between people.

Nor can we underestimate the value generated by this kind of information exchange. In many cases, more exchanges can produce unexpected benefits.

A simple idea, but also approved by the emperor, made many people a little disdainful.

It also made some people more confident and felt that their own things were more capable of making the emperor's eyes brighter.

Next, an inventor named Chu Xuan commanded several people and carried a huge cylindrical shelf.

Others may be very unfamiliar with this thing, but Wu Changqing can tell at a glance that this should be a primitive astronomical telescope.

Astronomical telescopes are very different from ordinary telescopes for observing the scene on the earth. It uses a reflective structure.

The image light is collected first, and then reflected on a flat mirror, and then reflected into the eyepiece by the flat mirror.

An extra reflection process will lose some light, and the instrument will be more delicate, heavy and expensive.

In short, there are many disadvantages.

However, these shortcomings can not conceal its great advantages, that is, it can be made large enough, and it has a large focal ratio, which is good for imaging and for observing extremely far away images.

With this reflective astronomical telescope, the difficulty of studying the starry sky is tens of times easier at once.

In the past, relying solely on naked eyes to observe, can be said to be a huge torture.

For astronomy, the invention of this astronomical telescope has extremely important significance, and it can even be said to be a milestone event.

However, businessmen are not very interested in this thing, because this thing is purely for research and does not have much commercial value. Investing in this kind of thing does not make money.

Moreover, the wealthy businessmen do not know the significance of studying the starry sky.

Things on the ground have not yet been fully understood. What is the use of studying the starry sky? Is it possible to fly to the starry sky in the future?

"Yes, this thing is very good."

Something that was very tasteless in the eyes of the wealthy businessmen, but once again received praise from the emperor, which embarrassed the wealthy businessmen who came to watch it.

They have never thought that they are so stupid, and they always fail to see the value of a thing.

This is really a bad discovery.

After the astronomical telescope, finally came an invention of interest to business people.

Kerosene lamp.

The beautiful appearance, super brightness, and advanced fuel immediately attracted the attention of businessmen.

The market for this thing is too big. Lighting is necessary for the inner courtyard of the imperial palace and the homes of the people of Liming.

And the standard to measure the core of lighting tools is brightness, this kerosene lamp can hang candles, and the previous oil lamps.

The previous oil lamps were too crude, not windproof, unsafe, and inconvenient to use.

The kerosene lamp invented by Zhu Yuheng solved almost all the problems of the old-style oil lamp.

The exquisite appearance made of glass gives a high-end atmosphere.

Ultra-high brightness is the best choice for lighting tools.

The glass cover protects against wind and improves safety, prevents the lamp oil from spilling, and is convenient for movement.

The wooden houses of this period are quite fire-fearing.

This is especially true in the palace. Once there is a fire, it will be a big piece of fire.

Regardless of the people, this kerosene lamp is a very good invention for the safety of the palace.

Taking into account the use of civilians, this kerosene lamp is even more rare.

"Very good, this is an invention that benefits the people. An invention does not have to be tall or profound. Some simple principles, coupled with novel ideas, to invent tools that benefit the people in life is also a good invention.. ....."

Wu Changqing gave a high praise.

The appearance of this kerosene lamp can greatly enhance Dahua's use of oil, accumulate knowledge about oil, promote the use of oil, and promote the invention of internal combustion engines.

First of all, a deep understanding of petroleum and a high level of refinement are the foundation of the internal combustion engine.

This is still a long-term benefit, leaving it aside, it is also of great significance to benefit the people alone.

In the original time and space, even in the 1980s, China still had a large number of kerosene lamps in rural areas.

The popularization of electricity is much more difficult than the discovery of electricity.

Even if generators were used in the future, only a few large cities were benefited at first.

If you want to spread to the countryside, God knows how long it will take.

And this kerosene lamp is an important substitute before the popularization of electricity. The address of the latest chapter of the aircraft carrier I built in Daming: https://www.novelhall.com/book/149212.htmlI built the full text of the aircraft carrier in Daming to read the address: https://www.novelhall.com/read/149212/I built the aircraft carrier txt download address in Daming: https://www.novelhall.com/down/149212.htmlI read it on the mobile phone built by Daming: https://m.novelhall.com/read/149212/In order to facilitate the next reading, you can click on the \"collection\" below to record this time (Chapter 567 Good Things Continue) reading history, next time Open the bookshelf to see it! If you like "I Build an Aircraft Carrier in Daming", please recommend this book to your friends (QQ, blog, WeChat, etc.) ,Thank you for your support! ! (www.novelhall.com)