Section 627 The Five Treasures of Navigation

Gold, a ballast stone made of gold.

Normal people who can not be excited.

"Yes." Guo Du was not a little embarrassed: "I can see Uncle, we are a little scared." Because I couldn't figure out the uncle's preferences, reporting the matter of the ballast stone was equivalent to letting the uncle know that we had something to do with the matter of the inner storehouse, so I didn't dare to speak, and only borrowed some food. ”

"It's just a few pieces of gold." Han Jiang said that he didn't care.

Guo Du also understands that Han Jiang really doesn't care about those few pieces of gold at the moment.

However, something is better than nothing.

Guo Du still said: "It is rumored that there are hundreds of catties in a piece, and these add up to tens of thousands of taels of gold, and the discount is also hundreds of thousands." ”

Han Jiang shook his head: "The Wancheng Army will squeeze out no less than 20 million guan from Lin'an this time, just a few hundred thousand guan don't bother, if you can really see it in the future, it's not bad to leave a souvenir." Let's finish the face of the prince and escape the special ballast stone. ”

Guo Du didn't dare to answer this.

After all, Da Song is still there.

The Great Song Dynasty returned home.

One sentence also shows Han Jiang's attitude towards the Great Song Dynasty.

What else can Guo Du do, he can only show loyalty: "The small one can't do big things, but when the uncle enters the palace in the future, the little one is quite familiar with the route in the palace, and he is willing to be the first army." ”

Han Jiang bowed his hand: "This heart, I, Han Jiang, accepted it." ”

Guo Du returned the salute, saying that he was invited to eat, and he would not be able to eat this time, so he found an excuse to leave after giving a gift.

Han Jiang didn't actually eat it, but he ordered someone to withdraw the small banquet, and then set it up again in another place, just so that another person was also invited.

This person, not an official.

Although he is from the Taishi Bureau, he is not an official at the moment, he is a scholar.

can discuss academics with him, only some of Shi Ziyan's juniors and disciples in the whole Jiaozhi, as well as several juniors of Lu You, and Chen Fuliang's senior apprentices, ordinary people can't do it.

In front of him, people like Liu Huai basically listen to the book of heaven.

Yang Zhongfu.

One relied on a brush to count the return year to three hundred and sixty-five days and two four twenty-five, cattle people.

He is doing his best to complete the sextant that Han Jiang needs.

When Han Jiang arrived at the flower hall, Yang Zhongfu was telling Shi Ziyan and Lu You about his recent research results.

"When the sun is tangent to the sea level, the altitude angle is taken so that the latitude can be calculated. This requires a geometric arithmetic, so, so, so. ”

Lu You looked at a wooden ball in front of him and asked suspiciously, "So, how to ask for longitude?" ”

Yang Zhongfu spread his hands: "This needs a real clock, it can't be the kind of play that is made, we need a real clock, a clock that keeps time accurately." At present, there are four things that can be accurately located on the sea: the sextant, the fine clock, the chart, and the astronomical calendar. ”

Shi Ziyan said in a very regretful tone: "No way, it will take at least another three years to make a real clock, the kind of pendulum clock placed in the house and the clock that you require to be placed on the ship accurately, and it is not easy to break, and it is easy to maintain, it needs to be a little difficult, is there no alternative?" ”

"Yes, you can use it at night, but you can't use it during the day."

Yang Zhongfu drew a simple diagram: "After thousands of years of observation by our ancestors, the star-moon timing method, based on the moon, is the star as the disk, this is the heavenly clock, but it is difficult to learn this." Fortunately, many experienced old sailors also know a little bit of fur, so it is faster to teach, but it is far less reliable than an accurate clock. ”

Yang Zhongfu's way of saying it is the moon distance method, which is indeed a reliable method.

Han Jiang approached at this time: "Let me ask, don't you need Sinan?" ”

Yang Zhongfu was stunned for a moment, then laughed instead.

That's right, how can there be no Sinan. It's just that this object is now too common for navigation, so he didn't mention it, to be strict, a compass is really indispensable for accurate positioning at sea.

Han Jiang sat down after giving salutes to Lu You and Shi Ziyan respectively: "This is the eighteenth parallel of north latitude, and this line is the most suitable place for people to spend their vacations." ”

Yang Zhongfu took over the topic: "This place is called Rinan County, and the reason for this name is that there are two months of time here every year, and the sun is in the north, which is a wonder in the Han Dynasty." Some time ago, I went to Yongzhou to pick up the Mojing I ordered, and asked the local government to help me build a small pavilion there, right in the mountains. ”

Han Jiang probably knew what the pavilion was, and Han Jiang said, "Tropic of Cancer? ”

"Well, this is a suitable name, I originally named it Huang Chijiaojiao, or Summer Solstice Pavilion, but that place is indeed every year when the sun reaches the northernmost point and then begins to go south. After my calculations, there will be a slight difference in location every year, the development of mirror-making technology is still too slow, and Jiaozhi City has money for me every year, but the money is still not enough. ”

Engage in research, when will the money be used.

Yang Zhongfu's current research focus is still on the sextant, as well as the improvement of latitude and longitude and the drawing of new nautical charts.

There is no need for Han Jiang to tell Yang Zhongfu how much the circumference of the earth's equator is, Yang Zhongfu sent a ship to find a place in Qiongya to prepare the mark according to the latitude and longitude, how long is the circle of the equator? How long the Tropic of Cancer was, and how long the latitude was, he still calculated with a brush.

He also calculated the location of the island of Ceylon and the location of Cairo.

For now, when the first ocean-going fleet is ready, he will definitely follow, and at the same time calculate the results of his most practical studies of latitude and longitude, the sextant, etc.

Asking for money is a necessary process for every researcher every time they meet someone who can give money.

Yang Zhongfu began to ask for money.

He needs a lot, a lot of money.

No amount of money is enough, he wants to go to heaven, he really wants to go to heaven.

Lu You made a gesture to the servant who was standing in the distance, signaling that it was time to serve.

At this time, a figure entered the garden, glanced at Han Jiang a few times, and in addition to identifying a few people sitting next to Han Jiang, he took out a piece of soap and gently scraped it a few times, put the powder on the soap corner on his nose and sucked it hard.

After a few breaths of emotion.

The figure rushed towards Han Jiang.

"Uncle, I'm so pitiful, I'm so poor. I can't live anymore, my unborn baby can't afford to buy a cow. ”

Han Qiao.

No one told him that Han Jiang had arrived in the South China Sea, but he could feel it from the reactions of the docks.

Many high-ranking people began to run out by boat, and the target was Ninan-gun.

Moreover, every person in high office carries his own official documents and account books. Even if these officials only know that they have to report last year's work and plans for the coming year, they don't know who wants to see it. Han Qian also smelled the smell, and Han Jiang arrived.

Because since the Han family has Han Jiang, the Han family has begun to do things like a year's summary and a plan for the coming year.

Therefore, it must be Han Jiang who has fallen.

After making sufficient preparations, Han Qian followed a boat that went to Rinanjun to go south.

Then, now.

Han Qian cried bitterly: "Uncle, I'm so poor, I'm so miserable, I'm so pitiful." ”