【Continue to ask for a commuter pass】

Qin Tianjian is a scourge, mortal enemy, and stumbling block to the development of astronomy.

On this point, it is the common understanding of Han Gang, Su Song and Shen Kuo.

And among them, Shen Kuo has personal experience. When he was ordered to revise the "Fengyuan Calendar" in the new way, he was reported by the group of moths in the east and the west in the west, and he did not do his full work.

Now, Han Gang and Su Song have each written to abolish the armillary sphere and armillary phenomenon with the armillary theory as the core theory, and remake a new type of astronomical observation instrument with the astronomical telescope as the core. These motions were delayed by them for various reasons. Then they came up with a set of plans, just adding lenses to the speculum on the armillary sphere, turning it into the form of a clairvoyant.

It's just that they don't dare to use the words of ghosts and gods to provoke Han Gang, a powerful minister. But Han Gang had already decided to copy their old bottom. Don't take advantage of the fact that the Son of Heaven is young now, and spread the word of Xuanye and Sun Heart to the hearts of the people, will he come up and ban dissentry when he becomes an adult?

And Han Gang's way of doing things has never been bickering, he always speaks with facts.

That's why Han Gang built astronomical telescopes, rebuilt the calendar, and made new timekeeping tools. These three, in astronomy, are basically on the same line. With one, you can carry a string.

"Telescopes are the simplest, and as long as the imperial court agrees, they can be built immediately. Wait for the Son of Heaven and Empress Taishang to see the four moons of Jupiter, as well as the rings of Saturn......" Shen Kuo stopped halfway through his words, and then said with a smile: "I can't see it now, it will take a while." ”

Whether you can see Jupiter's four moons and Saturn's outer ring is the most intuitive criterion for evaluating the quality of a telescope. But now, four years into Yuanfeng, Saturn's rings are just out of sight, and they have completely disappeared in the eyes of countless astronomy enthusiasts who observe Saturn.

However, a few years ago, when Saturn's rings and Jupiter's moons were just discovered, Han Gang had already predicted the characteristics of Saturn's rings, and claimed that due to the angle, they would disappear at some point in the future and would never be observed again, and they would not appear in front of the world again after missing that position. That is, the cyclical disappearance and appearance.

This is standard cheating. The prophet preached the outcome and then devised a theory to predict the outcome. However, since the results of the observations reflect the correctness of the prediction, Han Gang's theory is certainly correct.

"Stars, planets, moons, the three levels divide the sun, moon and earth, and it is enough to have the moons of Jupiter as proof. As long as the imperial court agrees to put the telescope in Si Tianjian......" Su Song turned his head sideways to Han Gang and said, "Even if you win half of the victory." ”

"That's true." Han Gang nodded.

Large astronomical telescopes are the best solution. But it's also the hardest to do.

The same telescope, the military one is called a clairvoyant, and the civilian one is called a telescope. This is to avoid the previous ban of the imperial court to classify the clairvoyant mirror into the ranks of military weapons and prohibit private collections. Although a supplementary clause was added later, large-caliber and hard-to-carry clairtelescopes are not considered military weapons, but they have also become a habit. The telescopes are all refractive and can be pulled straight, while the telescopes are mostly reflective, especially after the appearance of glass mirrors, reflecting telescopes have become more popular among astronomical enthusiasts.

In this era, the refracting telescope invented by Su Song was the best choice for large astronomical telescopes. Since the structure was published in the second issue of Nature, many people have the option to make their own. As long as you can pass the level of concave mirror, other components have channel procurement to solve the problem.

It's just that compared to the simplicity of manufacturing, getting Si Tianjian to agree to replace the armillary sphere with a telescope is the biggest problem. That was tantamount to admitting the failure of the Hun Tian Theory, and the foundation on which Si Tianjian had a foothold collapsed. If it really succeeds, it will be half the battle, as the lawsuit says.

"If you don't remove all the facial features in Si Tianjian, you can break it if you put it in. Isn't it up to them to decide the matter of watching the sky in prison? Shen Kuo was full of complaints, and the residual hatred of the year was still gone.

"It's definitely going to be done." Han Gang didn't plan to keep his hands either, since it was a stumbling block, he couldn't stay on the road, "Get rid of them to rebuild the calendar." ”

"Of course." Shen Kuo said hatefully, "Feng Yuanli is for them!" Gotta finish in a hurry. ”

After the telescope, the calendar was rebuilt on the basis of the heliocentric theory, and the last blow was dealt to the Hun Tian theory. But it has to be without interference. Shen Kuo made a mistake, and Han Gang had no intention of repeating it.

"And the timepiece. This is the top priority. Su Song said.

Shen Kuo said: "To time by swinging, the mechanism must be well designed. ”

Su Song said, "Han Gonglian's side has already talked to him, and there is no problem on his side." It is just that the ordnance supervisor and the craftsman who will be the supervisor need to cooperate to make the parts of the timepiece. ”

"That's fine." Han Gang said.

It can be said that all production arrangements require precise timepieces, not just astronomical. The first problem in making a timepiece was to find a marker that could provide a stable rhythm.

Sundials rely on the steady and regular movement of the earth to keep time. The leak is timed by a steady and continuous flow of water. The same is true for incense burning, where the flow of time is calculated by the burning of a cigarette.

When people grasp a law that can run stably, it is possible to keep accurate time. What Han Gang took out was the law of oscillation.

In the inaugural issue of Nature, there was a paper on the isochronism of oscillation. In the fourth issue of nature, Han Gang gave a more detailed explanation, and perhaps in the outside world, the mouth full of physical terms will make people confused. But the concept of kinetic energy, potential energy, the difference between velocity and acceleration. These physical concepts have been understood by many people through Han Gang's preaching over the years and the repeated repetition of several issues of Nature. And Su Song and Shen Kuo, after years of communication, have mastered a series of nouns and terms from later generations as defined by Han Gang.

Hangang wanted to create a new type of timepiece, and after explaining the principle, he received their full support. This timepiece is much more useful than a telescope.

Han Gang discussed with Su Song and Shen Kuo, and when it was time to release the ya, they got up and dispersed.

When he came out of the yazhong, a cold wind blew.

Han Gang tightened his cloak and looked up at the fallen leaves rolling in the air, and said that winter was coming.

The chill in the wind is getting stronger and stronger, and the business of the shops selling leather robes and cotton jackets has also begun to improve, and it is time for the cotton store to be busy again, but now the cotton store is no longer the only one in Longxi.

The cotton fields in Longxi are expanding day by day, and Gongzhou is becoming more and more prosperous. At least for now, cotton cloth is still the pillar of Longxi's foreign economy. It's just that because of the lack of population, the economic development of Xihe Road has slowed down, and it is about to be surpassed by those roads in the south of the Yangtze River that abandon rice and change to cotton.

There is still a lot of arable land that has not been reclaimed in Longxi. Before the population of Xihe and Ganliang 2nd Road exceeded 5 million, there was no need to worry about the lack of land.

It's just that the growth rate of the population has limited the further development of the cotton industry, even though the fertility rate of the Han people in Longxi has grown rapidly in a few years due to the peaceful and stable situation and the standards of this era, but it will not be until at least ten years later for these post-war newborns to be able to participate in production.

This is the dilemma that Longxi is facing now. Relying only on the dried sturgeon in Qinghai Lake, as well as the handmade saddles and bridles of the Tibetan people, they can't support the economy all the way. Private salt can't be put on the table. Cotton is the top priority.

However, the local cotton cloth in the south of the Yangtze River has appeared on the market, and the number of farmers who grow cotton is also increasing. In the long run, Xihe Road will not be able to compete with Jiangnan. This is true both in terms of manufacturing costs and the volume of transportation.

The major Tibetan tribes have all sat on the ground to share the spoils, and they have enjoyed a lot of benefits in recent years, and the expenses have become more and more large.

When Feng Congyi was still in the capital before, Han Gang asked him to go back and discuss with Bao Shun, Bao Yue, as well as Zhao Sizhong and Zhao Baoyi, who had changed their names and surnames, to see if they could recruit some people from Tibet in the south.

If you had recruited people in the past, you must have had a different idea. But now, as long as you look at the low-level people who have been driven into the cotton fields, you can see that the road is not the same thing at all

Originally, there were some remnants of primitive society, and the difference between the upper and lower classes was not so big. But with the deepening of sinicization, the upper class of Qingtang and Tubo completely devoted themselves to the luxurious life of the Han people. The people at the bottom were driven into the cotton fields to reclaim the land and plant cotton. The average yield of cotton is far higher than that of growing grain. Some tribes have even converted most of the land under their jurisdiction to cotton, and rely on external purchases for insufficient food.

As a qualified ally, Han Gang could not help but help them solve their immediate problems. One is to intensify the missionary efforts so that the Tibetan people can look forward to the next life, and the other is to replenish the population as much as possible to ensure the production of cotton grain.

On the other hand, the Han Chinese population had to maintain a greater growth rate. In addition to newborns, there are also exiled criminals. Over the years, as long as it is not a heinous felony, most of the prisoners have been sent to Longyou. In the old years, because there were too many prisoners from exile, and the prisoners had to be thrown into the sea, the number of guards is now more than the prisoners, and the Tidian Prison Department on Jingdong Road began to play half a year ago, to abolish the Salmon Island Prison and save money.

The imperial court issued several edicts, and east of Tongguan, all the exiles of more than 2,000 miles were exiled to Longyou. Kansai, on the other hand, is an exile, and its destinations will only be Xihe and Ganliang. It's just that it will take a long time to catch up with the number of Tibetan people.

In addition, the situation on the other side of the Tianshan Mountain also made Han Gang worried.

Wang Sunsin is about to face a second winter in the Western Regions. The soldiers inevitably feel homesick, and the rule of the new frontier is not an easy task. Only by integrating into China's economic circle can we maintain a stable centripetal force.

But what is the right thing to do over there? Just growing cotton and business, is it really okay. Han Gang didn't understand the local environment, and he couldn't have a clear answer now.