The early summer sun is not very hot, and it shines on the Wenshui River and shows waves. This turbulent ship sails on the water, like a mobile fortress built on the water, with surging waves shattering on the hull one after another. This 'Wang Zhou' for the king is still as stable as before, without any bumps.

Ying Shu sat in a three-story warehouse, holding the eldest master of the Bai family, and was pulling out a jade ball to make breakfast for him. It has been more than three months. Although the eldest master of the Bai family has become accustomed to drinking milk with a bottle, he will no longer bite the pair of red cherries on her chest every day, he still has to ensure that he will feed her breasts at least once a day. In fact, eating like this is very hard and takes a long time. The eldest master still enjoys it. He likes the smell of his mother. The "old man" who gradually becomes familiar from strangeness does the same. Why can't he not? Don't be a young master, with a small person, and his eyes are bright and his heart is bright!

Every time he sees his aunt feeding his cousin, Ying Qian, who is almost three years old, will become irritable and restless, and then stare at his mother's breasts, but Bu Rongyi does not like him. Old Qin's man must be weaned resolutely after the year and a half. What else can he have to do if he is always in his mother's arms? Holding his son's little hand groping on his chest, Bu Rongyi held his little head and looked at the deck, teaching a lesson: "Qian'er is already a big man. In the future, he will learn from your Uncle Bai, so why should he stay in his mother's arms? Look at the deck, the most learned people in the world, but even if they are combined, they can't compare to Uncle Bai... Is it good to let Uncle Bai be Qian'er's teacher in the future?"

Ying Qian raised his head and said silly: "Qian'er has many uncles and uncles. Why does his mother only say that Uncle Bai is the best?"

This is a baby who is less than two years old? He just learned to speak for less than three months. He actually asked his mother back. Bu Rongyi was stunned by his question. He thought for a while and said, "When my mother gave birth to Qian'er, Qian'er was naughty and refused to come out. Uncle Bai helped Qian'er come out. Do you think Uncle Bai is powerful? Your uncles, uncles also admire Uncle Bai the most. This is because Uncle Bai's knowledge is the best in the world. My Qian'er is the smartest child in the world. Of course, he has to learn skills with the best in the world. Other people are not worthy of it!"

Parents in modern society regard men and women as beasts. They often encounter children asking where they come from, either picking them from trees or digging them out from the soil. It seems that it is a very terrifying thing to know the truth by children. However, in the pre-Qin era when the weather is open, adults will take their children to see the birth process of lambs when they are very young, so that they can understand the principles of species reproduction early. Researchers have proved that in the tribes worshipped totem, some tribes simply worship the genital organs of men or women, believing that this is a necessary way for ancient people to ensure the reproduction of tribes in the harsh natural and social environment of the people. The same is true for the Qin people. Bu Rongyi, a foreign lady, would not avoid anything in front of their children.

"Mom, why did that white-bearded old man shake his head?"

The little guy's eyes were pretty good. He saw Master Yan who was shaking his head on the deck at a glance. Bu Rongyi looked carefully and laughed out loud: "He lost to your Uncle Bai, it would be strange if he didn't shake his head."

"Uncle Bai is so amazing. Qian'er will be Uncle Bai's student in the future!"

Looking at the happy and laughing sister-in-law and nephew, looking at Ying Quliang who was laughing loudly on the deck and Master Yan who shook his head and sighed repeatedly, Ying Shu felt a sense of pride in her heart, as if it was not Bai Dong, but her who won these masters: "It turns out that this kid is really amazing. Not only can he deceive women's families, but also has the ability to win these famous masters. Well... he lived in Qin during this period, and he is also a good husband and a good father.

Every day, I asked the man named Yu Nu Yi Ersan to play the piano for me and Yue'er. Yue'er's crying sounds have become much better now. Well, if he comes to my building room tonight, he will not use a whip and bite it a little... No, it's three, who made him so bad, and he will send me and my baby back to Qi State? I don't know what he and these old guys are doing, from the mountain to the water, and now it's time to finish their work?"

It is not difficult to prove that the earth is a ball. The horizon and horizontal lines are the best proof. Unfortunately, Lao Yan Jian and his group were poisoned too deeply by old ideas. Bai Dong took them to climb to the highest mountain near Liyang and pointed to the horizon to ask them. If the world is really "round and round", why would the vision suddenly disappear when it is still clear, and they could not see a foot or an inch? A group of old masters and young masters looked at it for a long time, some were silent, and some frowned and thought hard. Lao Yan Jian was the most amazing, and he actually said that there must be heavy fog in the place where the vision disappeared, so he blocked his vision and could not look far away. Well... the blue sky and the sun could actually say such nonsense, and probably was forced to say too much; Bai Dong was too lazy to say anything. Anyway, he would set off to Qiyue tomorrow. To prevent the road from being bumpy, he decided to go on the waterway this time, so he would see the matter on the boat tomorrow...

Just now, Lao Yan Jian and the others looked at the horizontal line on the deck. In fact, everyone has seen this kind of scenery, but no one will pay attention. At this time, Bai Dong reminded him that this "horizontal line" is exactly the same as the "horizon" I saw yesterday. The weather is good today, and the sight on the boat is good, but I can't pull any heavy fog up.

At this time, Master Meng, Yang Zhu and others nodded secretly. If the world was a square, such horizontal lines and horizons would definitely not appear. Bai Dong should be right. This world is probably really a huge ball. Because of its hugeness, everyone just thinks it is standing on a plane. But when looking into the distance, the "horizon" and "horizontal lines" will appear. It's just that Lao Yan Jian is too obsessed with it. At this time, he is still thinking about whether there is a third possibility, so he refuses to admit defeat. Bai Dong did not force him to express his opinion. If he easily agrees with one thing, he is not worthy of being a descendant of Yan Hui.

When he saw a ship appearing from the horizontal line, and the mast first appeared, all the men sighed. No wonder Bai Dong, the boy, was moving from the mountain to the boat. The ship slowly appeared on the water was too convincing. Old Yan Jian looked at Bai Dong blankly, first paused his feet and shook his head. Then he laughed loudly. Shaking his head was to sigh that he had studied hard all his life and debated countless times. But he never lost so miserably. Da laughed. He realized in his late years that the world was actually a ball. As the saying goes, "I hear the truth in the morning and die in the evening." When he was a big white, he drank the Bai family's wine, and it was not the most precious high-level wine that he didn't drink!

The gray-backed falcon has already flew back to Baijiazhuang with letters, and the good wine and food will be delivered to the ship soon, but Bai Dong called Gongshuzhi and took a kettle with a novel look. The kettle looks like a carving plate, and there are holes on it above it. I don’t know what it is intended to be used for. However, there are too many fresh things that Bai Dong has made, and everyone has been accustomed to it, and it is speculated that it must be related to the "longitude".

Modern people have a bamboo pole, a ruler and a watch that can measure the latitude and longitude of their location. The method is extremely simple. Those who have been in junior high school geography classes should know, but it is more difficult in this era when sundials and hourglass are still used to measure time, because the sundials can only be accurate to the tiles, and the error of longitude is too large. With the craftsmanship level of this era, Bai Dong could only make the "water clock" created by the Greeks around 1000 AD. After drawing a simple pattern, he pushed it directly to Gongshuzhi, which made this guy sleepless for days and nights, and even his hair turned much white.

The principle of this water clock is to open a small hole in the upper part of the kettle so that excess water can overflow from this small hole, so that a fixed horizontal plane can be maintained and a constant pressure can be maintained. After the water flows out from the small hole in the lower part of the kettle, it is injected into the internal water receiving kettle. There is a floating boat in the kettle, and the floating boat is equipped with a finger arrow rod. When the water in the kettle reaches a certain height, the water can be injected into the rotating balance wheel through a siphon, driving a row of gears to the time position, so as to bring the drum-shaped cylinder for timing to the time position according to the length of day and night.

Bai Dong asked for more exquisiteness, not only did he cast a rougher iron gear, but he also needed to replace water with mercury, which would avoid the trouble of draining water at any time. However, in this way, an extra pot body that could circulate left and right outside the small overflow hole would be added, making the entire water clock look more like a double pot and a deformed gourd.

This little change has spanned several generations of design ideas from sundials to water clocks to exquisite mercury water clocks. Some of them are even "stop watches" ideas of Chinese scientists in the 15th century. This is almost an impossible task, but Gongshuzhi actually took Gongshuzhi's skilled craftsman to complete it! It is said that after completing it, he did not show it to Bai Dong, but sent one of the two "mercury clocks" he made to Shouyang Mountain to teach birds and see. Is the world's number one skilled craftsman of our Gongshuzhi's disciple or your Mo family? Bai Dong not only did not blame him, but repeatedly praised Gongshuzhi's actions; the progress of science and technology is driven by competition. If the Mo family develops more exquisite clocks in anger, he will be happier.

Seeing the iron dial and pointer outside the deformed gourd, Zhao Feng's eyes lit up: "Bai Zi, is this a new timekeeping object?" Old Yan Jian and others may not know what the progress of timekeeping object represents. He, a mathematician, knew clearly. In excitement, he wanted to snatch it and play with it carefully before he could take advantage of his wish.

"This is called the 'Tian Mercury Bell', which is a timer made for the endogenous source by Taoist alchemy. Although it is not very satisfactory, it can be accurate to one-forty-fifth of the 'carving'..."

This mercury clock can be accurate to every minute, but in the smallest time unit in the pre-Qin era was still "carved", Bai Dong could only explain it in language they could understand. Fortunately, his math books were already spread across countries at this time, and the masters in front of him were not unfamiliar with the concept of fractions he proposed.

"One forty-fifth of the carving!"

Lao Yan Jian, Meng Master Meng and others were shocked and could not believe their ears. Everyone gathered to see them and found that the engraving of this thing was very different from the sundial. Not only was the scale more dense, but it was not expressed in words at the same time, but the symbols used in Bai Dong's book were replaced.

"Yes, it's exactly one-forty-fifth of the tick. With such a time-calling thing, we can calculate the longitude we are in anytime, anywhere..."

ps: Thank you for your monthly ticket support from the brothers ‘Boby丨灬Bao灬’ ‘Sichuan Ahuang’ ‘Blood Shadow’ ‘ynab’ ‘jxhs84’. Thank you:) (To be continued, please search Piaotianwen, the novel is better, updated and faster!
Chapter completed!