The early summer sun was not very hot, shining on the Wenshui to reflect the scales and waves, this ship sailed on the water, like a mobile fortress built on the water, the turbulent waves smashed into the hull one after another, this special for the king to ride the 'king's boat' is still smooth and unbumpy.

Ying Shu sat in the three-story warehouse, holding the eldest young master of the Bai family in her arms, and was pulling out a jade ball to make breakfast for him, it has been more than three months, although the eldest young master of the Bai family has been accustomed to drinking milk from a bottle, and will no longer bite the pair of red cherries on her chest every day, but she still has to ensure that she is fed close to her chest at least once a day, in fact, it is very hard to eat like this, and it takes a long time, the eldest young master is still happy to do it, he likes the taste of his mother. The 'old man' who had gradually become familiar from strangers did the same, so why couldn't he? Don't be a big young master, your eyes are bright and your heart is bright!

Every time he saw his aunt breastfeeding his little cousin, Ying Qian, who was almost three years old, would become irritable, and then look at his mother's breasts, but Bu Rongyi was not used to his problem. Lao Qin's male son is resolutely weaned after the age and a half, what can he do if he is always in his mother's arms? Holding down his son's little hand groping on his chest, Bu Rongyi lifted his little head and looked at the deck, teaching: "Qian'er is already a big man, you will learn from your Uncle Bai in the future, what will you do in your mother's arms?" You see, the deck is full of the most learned people in the world, but even they together can't compare to Uncle Bai, so let's let Uncle Bai be a pious teacher in the future? ”

Ying Qian raised his little head and said in a milky voice: "Qian'er has many uncles and uncles. Why does my mother only say that Uncle Bai is the best? ”

This is a baby who is less than two years old? It didn't take three months to just learn to speak. Actually asked his mother? Bu Rongyi was stunned by his question. After thinking for a while, he said: "When my mother gave birth to Qian'er, Qian'er was naughty and refused to come out, or did Uncle Bai help Qian'er come out, do you say Uncle Bai is powerful?" Your uncles and uncles also admire Uncle Bai the most, because Uncle Bai's knowledge is the best in the world. My pious child is the smartest child in the world, of course, I have to learn from the best person in the world? No one else deserves it! ”

Parents in modern society regard sex between men and women as a predator, and often encounter children asking where they came from, either plucking from trees or digging out of the soil. It seems that it is a very scary thing for a child to know the truth; But in the pre-Qin era of open atmosphere, adults will take the child to see the process of lamb birth when he is very young, so that they can understand the truth of species reproduction early, some researchers have proved that in the totem worship tribes, some tribes will simply worship the birth ~ reproductive organs of men or women, thinking that this is the ancient people in the harsh natural and social environment, to ensure the reproduction of the tribe must be practiced. The same is true for the Qin people, and Bu Rongyi, a lady from a foreign race, will not shy away from anything in front of her children.

"Mother, why is that white-bearded old man shaking his head?"

The little guy has a good look. At a glance, he saw Old Master Yan who was shaking his head on the deck, and Bu Rongyi took a closer look. Unconsciously laughed out loud: "He lost to your Uncle Bai, it's strange not to shake his head." ”

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

Looking at the happy and laughing sister-in-law and nephew, and then looking at the laughing Yingquliang on the deck and the old master Yan who shook his head and sighed again and again, Ying Shu felt a sense of pride in her heart, as if it was not Bai Dong who won these masters, but her: "It turns out that this kid is really amazing, not only deceiving women's families, but also having the ability to win these famous masters." Well, during this period of time, he lived in Qin State, and he was also a good husband and father, and he invited the one named Yu Nu Yi Ersan to play the piano for me and Yue'er every day, and Yue'er is now crying and crying has become much better. Well, if he comes to my building tonight, he won't need a leather whip, it's good to take two small bites, it's three, who made him so bad, and he wants to send me and the baby back to Qi again? I don't know what he and these old fellows are doing, from the mountains to the water, and now it's time to finish their work? ”

It is not difficult to prove that the earth is a round sphere, and the horizon and horizontal line are the best proof, but it is a pity that Lao Yan Jian's gang was too deeply poisoned by outdated ideas, Bai Dong took them to climb to the highest mountain near Liyang, pointed to the horizon and asked them If the world is really 'the sky is round', why does the line of sight suddenly disappear when it is still clear, and they can no longer see an inch more? A group of old masters and little masters watched for a long time, some were silent, some frowned and pondered, and the old Yan Jian was the most desperate, and actually said that there must be a fog where the sight disappeared, so that the sight was blocked and could not be seen far away. Well, if you can say this kind of nonsense in the middle of the day, you probably have been forced to be in a hurry; Bai Dong didn't bother to say anything, anyway, he was going to set off for Qiyue tomorrow, in case of hard bumps on the road, this time he decided to take the waterway, so let's see you on the boat tomorrow

Just now Lao Yanjian and they were looking at the horizontal line on the deck, this kind of scenery has actually been seen by everyone, but no one will pay attention, at this time was reminded by Bai Dong, only to find out that this 'horizontal line' is exactly the same as the 'horizon' seen yesterday, today's weather is very good, and the sight on the ship is good, but there is no fog on it.

At this time, Meng Fuzi, Yang Zhu and others have secretly nodded, if the world is a square, it is categorically impossible to have such a horizontal line and horizon, Bai Dong should not be wrong, this world is likely to be a huge ball, because it is huge, everyone should only stand on the plane, but when looking into the distance, there will be a 'horizon' and a 'horizontal line', but Lao Yan Jian is too persistent, and at this time he is still thinking about whether there will be a third possibility, so he refuses to admit defeat? Bai Dong didn't force him to express his position, if he agreed with one thing lightly, then he was not worthy of being Yan Hui's descendant.

When they saw a ship appear from the horizon, and the first thing to appear was the mast, all the sons sighed, no wonder Bai Dong, this kid was going to move from the mountain to the boat, the boat that slowly appeared on the water was too convincing, Lao Yanjian looked at Bai Dong blankly, and first shook his head with a heavy pause. Then laugh out loud. Shaking his head is to sigh that he has studied hard and debated countless times all his life. But he has never lost so badly, but he laughed and understood that this world was originally a round ball in his twilight years, as the so-called 'morning news, twilight death' When a big white floats, he drinks the wine of the Bai family, and it is not the most precious high wine!

The grayback falcon had already flown back to Baijiazhuang with the letter, and the good wine and food would be delivered to the ship soon, but Bai Dong called the public to take a new kettle. This kettle-like thing looks like it has a carved disc on the outside, and there are air holes on the top, so I don't know what it is going to be used for. However, there are too many new gadgets that Bai Dong has made, and everyone has already seen it, guessing that it must be related to the 'longitude'.

Modern people have a bamboo pole, a ruler and a watch can measure the latitude and longitude of their location, and the method is extremely simple, those who have taken a junior high school geography class should know, but in this era of measuring time with sundials and hourglasses, it is more difficult, because sundials can only be accurate to the moment, and the longitude error is too large. With the level of craftsmanship of this era. The only thing Bai Dong can make is the 'water clock' created by the Greeks around 1000 A.D. and draw a simple pattern. It was directly pushed to the public to lose the straight, causing this guy to stay awake for several days and nights, and even his hair was much grayer.

The principle of this water clock is to make a small hole in the upper part of the kettle, so that excess water can overflow through this small hole, so that it can maintain a fixed level and maintain a constant pressure. When the water in the kettle reaches a certain height, the water can be injected into the rotating balance wheel through the guò siphon, which drives a row of gears to rotate, so that the drum-shaped cylinder for timing is brought to the time position according to the length of day and night.

Bai Dong asked for more elaboration, not only to cast a rougher iron gear, but also to replace water with mercury, so as to avoid the trouble of draining water at any time, but in this way, the overflow hole should be added to the outside of the pot body to play a self-circulating left and right, so that the whole water clock looks more like a conjoined double pot, and like a deformed gourd.

Just this little bit of change is across several generations of design ideas from sundials to water clocks to exquisite mercury water clocks, and even some of the 15th century Chinese scientists' "stop watch" ideas in it, which is almost an impossible task, but the public loser actually took the public loser to complete the skillful craftsman! It is said that he did not show it to Bai Dong as soon as he finished it, but sent one of the two 'mercury bells' he made to Shouyang Mountain, so as to teach the birds to take a look, is the world's first skillful craftsman a disciple of our Gong loser or your Mo family? Bai Dong not only didn't blame him when he heard this, but praised him again and again for his straightforward behavior; The progress of science and technology has always been driven by competition, and the Mohists would have been happier if they had developed more elaborate clocks in a fit of rage.

Seeing the iron dial and hands on the outside of this deformed gourd, Zhao Feng's eyes lit up: "Baizi, is this a new timekeeping thing?" "Lao Yan Jian and these people may not know what the progress of the timer represents, but he, an arithmetician, is clear, and under the excitement, he can't wait to snatch it over and play it carefully.

"This is called the 'Heavenly Mercury Bell', which is a kind of timer made from the tribute used by Taoist alchemy as the internal source, although it is not very satisfying, but it can be accurate to one-forty-fifth of the 'carving'"

This mercury clock can be accurate to every minute, but in the pre-Qin era, the smallest unit of time was still 'moment', and Bai Dong could only explain it in a language they could understand, but fortunately, his arithmetic books had spread all over the country at this time, and these masters in front of him were no strangers to the concept of fractions he proposed.

"Forty-fifth of the carving!"

Lao Yan Jian, Meng Fuzi and others were taken aback, they couldn't believe their ears, everyone gathered to see, and sure enough, they found that the carved disk of this thing was very different from the sundial, not only the scale was more dense, but also did not use words to express it at all times, but replaced it with the symbols used in the Bai Dong arithmetic book.

"Yes, it is exactly one-forty-fifth of the timekeeping, and with such a timekeeping, we can measure the longitude of our time and place."

Ps: Thank you for the monthly ticket support of the brothers 'Boby丨灬宝灬', 'Sichuan Ah Huang', 'Blood Shadow Fang', 'ynaB' and 'jxhs84', thank you :) (To be continued......)