"Group A measurement, angle 12 degrees 48 minutes!"

"Group B measurement, angle 15 degrees 15 minutes!"

"The two sets of measuring points are 60 feet apart."

After the two measurement teams reported the measurement results respectively, the four students took out paper and pens at the same time, half-squatted on the ground and quickly calculated. Since learning measurement technology with Su Hao, they are all accustomed to writing Arabic numerals with charcoal for mathematical operations, as for the trigonometric functions that need to be used in the operation, Su Hao has also specially made a trigonometric function table, which was sent to the hands of the students for reference.

The charcoal pens used by the students are very different from the charcoal bars that Su Hao found casually before, with a thinner refill and a movable wooden barrel on the outside, which looks a little like the movable pencils of later generations. To carry out geographical survey, you need to work in the field, and it is very inconvenient to use a brush and inkstone, so this charcoal is the best recording tool.

The improvement of measuring instruments is more obvious, since the creation of the telescope, Su Hao has been thinking about using the telescope on the theodolite. With the cooperation of Hao Yizong and Hao Qing's father and son, Su Hao successfully transformed the original theodolite, installed a special telescope, and designed a set of devices to adjust the angle of the telescope, so that the reading of the measurement angle can be accurate to the minute.

With such an instrument, the measurement work can be described as a tiger with wings. During this time, Su Hao hurriedly trained several students such as Ma Yu and Jiang Yida, so that they could proficiently master the skills of measuring distance, elevation and other indicators. Now, Su Hao wants them to show it in front of the recruits, so as to strengthen the confidence of the recruits.

"Qi Su Baihu, the calculation results, the distance between the two poles is 8 zhang and 3 feet." Ma Yu was the first to report his own calculation results, and then the rest of the students also reported the results one after another, which was exactly the same as Ma Yu's calculations.

Su Hao smiled and said to the young recruits: "Everyone has seen that just now our students have calculated the distance between the two bamboo poles held by the Xiong brothers, which brother is willing to go over and actually test it?" ”

Everyone looked at each other, and although everyone was very eager to know if the results of the students' measurements were correct, this was to test whether what the chief said was correct. If the test results are correct, that's it; If the results of the test prove that the chief's words are wrong, this will be a slap in the face of the chief, who would dare to go to a thousand for this kind of thing?

"Haha, you don't have to be restrained, go and actually test it, if the results of the test are different from the results calculated by our students, it means that they are not good at learning, and I will punish them." Su Hao said with a smile.

Hearing Su Hao say this, a young man named He Bencheng raised his hand to sign up, and then a few more people also registered. Su Hao asked Ma Yu to take out a few soft rulers and hand them over, and He Bencheng took them and ran to the Xiong brothers.

"Hey, brother, what were you doing just now?" Xiong Minfan asked He Bencheng who ran over, the place where he was standing was a hundred steps away from the group, and he couldn't hear the movement over there.

He Bencheng said: "Just now Su Baihu called four students to look at a cylinder there, and I saw that there were glass pieces on the cylinder." After reading it, they said something about what degree and what was divided, and then they calculated it, saying that there was a difference of 8 zhang and 3 feet between the two bamboo poles of your brothers. ”

"8 feet 3 feet?" Xiong Minyang, who was standing at the other end, heard it, he squinted at the distance between himself and his brother, and said, "This Su Baihu still has two strokes, and I also think that there is a difference between me and my brother." However, to be able to see that it is exactly 8 zhang 3 feet, I wonder if it is nonsense, right? By the way, brothers, you won't be sent by Su Baihu to fight sloppiness, right? ”

He Bencheng said: "I still wonder if you two brothers have received Su Baihu's secret teaching, and they just stood 8 feet and 3 feet away, so that Su Baihu can coax us." However, as I saw just now, when you two brothers walked in both directions, they didn't count their steps, so they must have walked casually. Two, you stand still, let me measure if it is exactly 8 zhang 3 feet. ”

A few people who came to measure the distance entered, and each hand had a soft ruler, and they began to measure while muttering. The Xiong brothers stood there and didn't dare to move their nests, but their eyes were fixed on each ruler in their hands, waiting for them to uncover the mystery.

"It's evil, it's exactly 8 feet 3 feet!"

"I'm here too, 8 feet, 3 feet, 2 inches."

"Forget about these 2 inches, this bamboo pole is more than 1 inch thick, which end of the bamboo pole do you say we count?"

After a few measurements, they were all dumbfounded, the distance between the two bamboo poles was exactly the same as the one calculated by the students, and the difference, that is, the fraction of the ruler below, everyone knew that this was not important, and there was no way to study it in detail. A few of the Xiong brothers couldn't help but turn their heads to look in the direction of the group, estimating how accurate they would be if they had to judge the spacing between the two bamboo poles at such a distance.

"He Bencheng, have you finished the measurement?"

There was a shouting on the part of the group, He Bencheng thought of his duty, and hurriedly left the Xiong brothers and ran towards the group, and responded loudly as he ran: "The measurement is over, the measurement is over, 8 zhang 3 feet, the score is exactly the same." ”

When this voice shouted, the eyes of the people looking at Su Hao and those students were completely different. Previously, when listening to the students report the distance, everyone was somewhat skeptical, but now when they heard the results of going to measure the distance, everyone felt shocked from the bottom of their hearts, which is a kind of awe of knowledge.

"Why, the master of the hundred households used this object to measure the distance?" Xiong Minfan, who was carrying the red and white benchmark, walked to the theodolite that the students had just used, looked at the telescope above, and asked curiously.

Su Hao stepped forward with a smile and said to him, "Xiong Minfan, you have worked hard, do you want to see this telescope?" ”

Xiong Minfan was stupid and bold, and when he heard Su Hao speak to him so politely, he nodded and said, "If you want to see it, how do you think of it?" ”

Su Hao beckoned and motioned for him to put his eyes on the eyepiece, Xiong Minfan did the same, he only glanced into the binoculars, and then raised his head in fright. His movements were so great that he almost knocked the tripod over.

"What's the matter, second brother?" Xiong Min asked, leaning to the side.

"Third child, look at this, it's so strange, there are demons in it." Xiong Minfan pointed to the binoculars and said.

Xiong Min looked up at Su Hao, and seeing that Su Hao had no intention of objecting, he also put his eyes on the eyepiece and looked into the distance. He was calmer than his brother, but he was surprised by another hole in the telescope.

"Su Baihu, what is this, how can you pull things in the distance into front of your eyes?" Xiong Min looked up to Su Hao and asked. He still had some disdain for Su Hao before, but now this disdain has disappeared. He is a smart person himself, and he has more admiration for what he does.

Su Hao said: "This thing is called a telescope, and its function is to help us see things in the distance. If we want to do mapping, we need to be able to accurately identify distant objects. The telescope was made specifically for mapping, so it also has scales engraved on its lenses. ”

"Su Baihu, can we have the opportunity to use such things in the future?" Xiong Minyang asked, he already liked this thing in just this moment.

Su Hao smiled: "There is an opportunity, but I am afraid that you will be bored with this thing for a while." ”

"I'm afraid this telescope will cost a few taels of silver to buy, right? Can you really use it for us in the future? He Bencheng also stepped forward and asked while trying to look at the telescope.

"What do you say?" Hao Tong didn't know when he came over, he glared at He Bencheng, and said: "This monocular telescope is worth 50 taels of silver, you should be careful with Lao Tzu when you use it in the future, if it is damaged, you can't afford to pay for the white spoon skin." ”

"My mother, 50 taels!" Zhongjin was so frightened that he took a few steps back, for fear that he had really accidentally touched this expensive thing.

Su Hao had no choice but to step forward to play a round: "You don't have to worry, no matter how expensive the tools are, they are all used for use, you just need to be careful when you use them, and if you inadvertently damage the tools, you will not be compensated." In this way, everyone has stood up, and now we will let Mr. Hao preach military regulations to everyone. ”

The students left with tripods and measuring instruments, and the recruits stood up again, facing the earthen platform. Hao Tong strode up to the earthen platform, scanned the audience with a knife-like gaze, and then began to read out the military law:

"Order: In each team, there are two officers in charge of the order. …… During the march, those who dared to rob the people's property and more than 10 times were beheaded for public display. The leader connived at the sergeants, and those who were taken captive to ten points were dismissed from their posts and confiscated into the army. Twenty or more, to the whole team, the head of the camp gate, the sergeant and all put to death. Those who are in the army and recruit newcomers, who do not know military law, dare to make words to confuse their hearts, obstruct orders, and cause bad things will be executed in Ling Chi and have no family. Those who are on the run, and who do not listen to the orders of the general army, will be beheaded......"

As the word "chop" popped out of Hao Tong's mouth one after another, the noise of the recruits below gradually became lower, and finally the competition reached the level of silence, and in the entire barracks area, only Hao Tong's expressionless voice could be heard.

Su Hao stood behind Hao Tong with his hands behind his back, listening to these military regulations, and looking at the silent recruits below, he couldn't help but sigh:

Discipline is strict enough, and in some places it can even be called harsh. But in reality, how many troops can do the same? The discipline of the Ming army collapsed, which was a notorious thing, and Su Hao had heard of it even 400 years later. Building a well-disciplined army that can fight well is something that countless aspiring generals diligently pursue, but how many have really done it?

By mistake, he actually became a member of the Ming army, so what should he do in the future? Will they actively devote themselves to the construction of the army, or will they retreat bravely after training these scouts, as they agreed with Zhang Hong before?

Since you're here, let's do it hard, Su Hao said to himself.