I Build an Aircraft Carrier in the Ming Dynasty

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

This new Lei Jian screen shows not an invention, but an idea.

He improved the transmission method of letters and came up with the concept of envelopes.

In the current correspondence, the post station is only suitable for celebrities, because celebrities and well-identified recipients are easy to find.

It is actually very difficult for the postman to deliver the letter in a timely and accurate manner for the unknown person, or the person who lives without a fixed address.

These unknown people send letters, often relying on acquaintances to help deliver them.

If you don't have acquaintances to travel far, then there is no way.

And Lei Jianping's current design concept is to unify the delivery method of letters, so that ordinary people can also use the station.

The sender is required to indicate the recipient's name on the envelope, as well as various detailed introductions, interpersonal relationships, detailed address or work location, and recipients, etc.

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

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

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

When someone sends a letter to someone who lives in Xuanwu Street, they only need to indicate the address of Xuanwu Street, and the postman will hand over the letter to Xuanwu Street, and the local person in charge will carry out the next-level delivery.

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

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

At the same time, in order to maintain this operation, there is also a charge for the delivery of letters.

In this way, we can get rid of the dependence on acquaintances for sending letters in the past, and make it possible to communicate between two ordinary people.

This idea, it's not a whimsical idea, and it doesn't give people a feeling of surprise.

However, in practical application, it still has certain positive significance.

The complete disappearance of letters, at least until there is a mobile phone text message.

In the future, whether it is wired telegraphy or wireless telegraphy, it will be used to transmit important information. Ordinary people will not send telegrams for a letter from home, and there is no such luxury.

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

Wu Changqing hummed, expressing his approval of his idea.

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

The value of this kind of information exchange cannot be underestimated. In many cases, more exchanges can produce unexpected benefits.

A simple idea, but it was also approved by the emperor, which made many people a little disdain.

It also made some people more confident, and felt that their own things could make the emperor's eyes shine.

The next one, an inventor named Chu Xuan, led several people and carried a huge cylindrical shelf.

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

Astronomical telescopes are very different from ordinary telescopes that observe the scene on the earth. They use a reflective structure.

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

With an extra process of reflection, some light will be lost, and the instrument will be more delicate, bulky and expensive.

In short, there are many shortcomings.

However, these shortcomings cannot cover up its great advantages, that is, it can be made large enough and has a large focal ratio, which is conducive to imaging and observation of extremely distant images.

With this reflective astronomical telescope, the difficulty of studying the starry sky is suddenly dozens of times easier.

In the past, it was a huge torment for people to rely solely on naked eye observation.

For astronomy, the invention of this astronomical telescope is of great significance, and can even be said to be a milestone event.

However, businessmen are not very interested in this thing, because this thing is purely used for research, it does not have much commercial value, and it is not profitable to invest in this kind of thing.

And the wealthy businessmen don’t know what it means to study the starry sky.

I still don’t understand everything on the ground. What’s the use of studying the starry sky? Could it be possible to fly into the starry sky in the future?

"Yes, this thing is very good."

Things that are tasteless in the eyes of wealthy businessmen have once again been praised by the emperor, embarrassing the wealthy businessmen who came to watch.

They never thought that they were so stupid that they could never see the value of something.

This is a really bad find.

After the astronomical telescope, finally came an invention that businessmen were interested in.

Kerosene lamp.

Beautiful appearance, ultra-high brightness, advanced fuel, all of a sudden attracted the attention of businessmen.

The market for this stuff is too big. From the inner courtyard of the palace to the homes of the people in the dawn, lighting is a must.

The core standard for measuring lighting tools is brightness, this kerosene lamp can hang candles, and the previous oil lamps.

The previous oil lamps were too simple, not windproof, not safe, and even more inconvenient to use.

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

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

Ultra-high brightness, even more

The obvious choice for tools.

The glass cover can prevent wind and improve safety, prevent lamp oil from spilling, and facilitate movement.

The wooden houses of this period were quite afraid of fire.

This is even more so in the palace. Once there is a fire, it will be a large area.

Regardless of the people, just for the security needs of the palace, this kerosene lamp is an extremely good invention.

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

"Very good, this is a kind of invention that benefits the people. Inventions don't have to be tall, and they don't necessarily need to be very profound. Some simple principles, combined with novel ideas, invent tools that benefit the people in life. It's also a good invention.. …”

Wu Changqing gave high praise.

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

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

This is still a long-term benefit. Leaving this aside, it is of great significance just to benefit the people.

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

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

In the future, even if the generator is developed, it will only benefit a few big cities at first.

If you want to popularize it in rural areas, God knows what year and month it will take.

And this kerosene lamp is an important substitute before the popularization of electricity.