The reason why Zhu Zaiyu was in the circle was that he didn't know how to describe the feeling that Chen Mu brought him, as if it was a ...... I don't know.

But Chen Mu knew that he did regard Zhu Zaiyu as an artificial intelligence computer with input buttons and output displays, as a state-of-the-art computer, as long as he entered a question, the answer would be displayed from the display screen.

Zhu Zaiyu did the same, because he thought it was interesting for Chen Mu to ask these questions.

It's so interesting.

This is a tireless person who explores the truth, Chen Mu's question is difficult, but it is not too difficult for him.

"Dashuai, everyone knows that the world is round, and relying on the geomagnetism to suck everything in the world on the ground, the two sides must not be the same height, this can be calculated, but the rough calculation is not accurate."

Zheng Wang Shizi said that he would move, picked up the pen and drew an arc on the paper, and the ink on both sides became a sea, but explained to Chen Mu and Chen Gongshi, and then said: "It is better to use a more accurate method to measure the water level difference in the way of layered weirs in the Song Dynasty." ”

Speaking, Zhu Zaiyu drew several hills of different heights on the map, added water levels of different heights, and then drew a few dams, and said: "The canal is divided into sections, layered into a step-shaped embankment, and the water is diverted and irrigated, and then the water surface of each section is measured step by step, and the difference between each section is accumulated, and the sum is the fact that the topography and water level from Changsheng Port to Daxi Port are high." ”

Zhu Zaiyu said: "Except for the two ends, there is lake and river water, and the water drawn out can irrigate the surrounding farmland - how long is the canal? ”

"I can't remember, the military government has this report." Chen Mu thought for a while and said, "More than 100 miles, passing through many lakes. ”

"That's easy to say, it's not as long as the Bianhe River, the water level difference in the 840-mile section of the Song Bianhe River is calculated like this, the difference in height is 19 zhang 4 feet 8 inches and 6 minutes, accurate to the minute, isn't it enough?"

Chen Mu blinked, looked at the very intuitive and easy-to-understand sketch on this picture, and asked himself a direct soul-piercing question: It's that simple?

"Well, that's a problem." Chen Mu stammered a little, and asked with a gesture on the map: "The sea level is not high, how to build the canal, the amount of earthwork dug up is too large, and the seawater will flood the fields on both sides, although the imperial court does not have too many fields on both sides of Panama...... It is mainly too time-consuming, and it is located in the tropics, and mosquito miasma is not good for construction. ”

When Chen Mu said this, Zhu Zaiyu's brows furrowed more and more, and his eyes were extremely inquisitive, until he heard Chen Mu finish speaking, he asked faintly: "Dig the ground flat?" Why do you need to dig up the ground? ”

"If you don't dig flat water, how can you connect together, how can the boat pass?"

"Do you know that there is a kind of water conservancy in this world called the double gate? The double lock has been in the Tang Dynasty, the Song Dynasty has the most canals, the canal water level in the Central Plains is also different, the first year of Song Yongxi, the transshipment made Qiao Weiyue build two buckets on the canal north of Huai'an. ”

"The two doors are more than 50 steps apart, and the boat enters the hanging door to store water, and when the level is discharged, the boat goes with the water, and there is no obstacle to the passage." Zhu Zaiyu waved his hand and said: "It is used in parallel with the weir dai, more water with the sluice, less water with the weir, if there is a tide, you can also repair the triple gate, if the water source of the double gate is not enough, you can also build one or two water storage in the side." ”

"As for how many double gates to be repaired and where to repair them, we still need to see the actual situation below to decide...... Why don't you take this opportunity to open a water conservancy course at Somuro University? ”

Listening to Zhu Zaiyu's words made Chen Mu laugh, he found out that this prince of Zheng Wang is very smart, needless to say, he is diligent in reading and studying, but he is very lazy.

He wanted to study the astronomical calendar, and then he asked the clan university to open an astronomy course, and took his brothers, nephews, and even grandchildren to study astronomy with him, so that he could direct them to work; Now Chen Mu wants him to contribute to the construction of water conservancy, he is also afraid of trouble, so he simply plans to let the sect university open a water conservancy course, so that he can continue to call these brothers and nephews in the future.

But what could he say? As long as his problem can be solved, even if Zhu Zaiyu opens a pig breeding department at Zongmu University, it will be no problem.

He looked around at Zhu Zaiyu's outdoor laboratory, looked at it, clapped his hands and said, "Okay, this matter is decided, it is a great thing that the sect university will open water conservancy again!" ”

As he spoke, just as his hand was about to touch a small piece of copper placed with the copper pipe on the cabinet shelf, Zhu Zaiyu hurriedly stopped: "Da Shuai, slow down, this square inch is mercury, which is poisonous." ”

Frightened, Chen Mu's hand hurriedly took it back, frowned and asked, "The poisonous prince still puts this?" ”

"Alas, it's still what I said below, I don't have any utensils, I can only measure and make my own, this copper pipe is made by me, it is a standard ruler, and a hundred millet is listed as a foot; The copper block was also made by me, and the contents were ten millet in a vertical column and a horizontal column, which was a square inch. ”

Chen Mu asked, "What is the use of this square inch and copper pipe?" ”

"Playing a musical instrument, the air enters and exits the pipe from the mouth, and then comes out through the hole, people who are familiar with music theory can hear how far this breath blows with their ears, and the one-foot sound is the rhythm of Huang Zhong, and the length and diameter of the pipe are not accurate, and the tone is not accurate."

"If you want to make the tone accurate, you need to make the tube accurate, but the inner diameter of the tube is different from top to bottom. Therefore, in the mercury, first cubic inch, weigh the square inch, and then weigh the square inch with mercury, it can be known that one inch of mercury weighs 13 taels and 3 cents and nine cents. ”

"In this way, you only need to count how many inches of mercury are poured into the copper pipe, and then add arithmetic, and you will know the sound of its contents."

Chen Mu blinked, and Zhu Zaiyu measured the density of mercury...... So, in order to play music better, the prince of the Ming Dynasty was forced to become a scientist by this era?

"Smack!"

Chen Mu clapped his hands and said, "This method of the prince can be used to measure the pipe!" No mercury, just use water, as long as the volume of the standard pipe is measured, then all the pipes can be measured by this, but where there is more water, less water, the inner wall of the pipe is uneven. ”

Zhu Zaiyu's discovery made Chen Mu expand his reverie: "Since there is a musician like Shizi who can distinguish the length of gas by listening to sound, and can also calculate it by arithmetic, then we can measure the expansion of the gas ignited by gunpowder through sound, so as to measure the force that gunpowder of different formulas can explode, and more accurately calculate the relationship between gunpowder, lead shots, caliber, length and power." ”

In the end, Chen Mu raised his hand to cover his mouth, watching Zhu Zaiyu finally clench his hand into a fist and be happy: This prince of King Zheng is really a treasure trove.

If the normal development is that people try their luck to walk the maze, even if they go to the door, they will have to use all their strength to push open the door of science and reveal a gap.

Then Chen Mu felt that as long as he and Zhu Zaiyu stood together, the maze would have been equipped with navigation, and he still had a cannon, the master needed to go to the door and let Zhu Zaiyu light a fire, and the cannonball could shatter the gate, and then Zhu Zaiyu would raise his foot and kick it open.

"Huh!"

Chen Mu's laughter couldn't be stopped, so that Zhu Zaiyu and Chen Shigong looked at each other, not understanding why Chen Mu was so happy, but they saw Chen Mu open his hands towards them after laughing enough: "Come, let's talk about how to make a microscope now!" ”

Zhu Zaiyu's expression was very annoyed, and he shook his head and said, "I really don't understand this." ”

Chen Mu is even happier, there is something you don't understand, he just wanted to say, 'It's okay if you don't understand, I understand.'" Just listen to Zhu Zaiyu's words have come out.

Shen Kuo of "Dream Creek Pen Talk" said that the ancients made bronze mirrors, the mirrors were large, and the mirror surface was flat; If the mirror is small, the mirror surface will be convex. If the mirror surface is concave, it will shine on the face of the person; The mirror surface is convex, and the face is small. A small mirror can't take a full picture of a person's face, so if the mirror surface is slightly convex, you can reduce the size of the face a little bit and show it all, so even if the mirror is small, you can also see all the faces. ”

"Since Dashuai wants a pair of lenses that can observe subtleties, it is necessary to measure many times, test the size of the lens, adjust the concave and convex lenses, and if one lens is not enough, one side will be stacked, and the middle distance needs to be measured repeatedly...... What are you looking at me like that? I, am I right? ”