"Senior sister, your watch... The chronograph compass is too rough. Mu Heng took Luo Yunjin's chronograph compass and studied it carefully for a long time, but he didn't understand its operating principle, but the scale on the dial made Mu Heng's heart infinite.

"Huh? This compass is so beautiful and feels so good, but it is one of my favorite objects, how can it become rough in my brother's mouth? Luo Yunjin seemed to be angry and aggrieved when he heard this. This is last year's birthday, a gift from Senior Sister Yang Lan, and I have liked it for a long time.

Besides, Senior Sister Yang Lan is the chief refiner of the Mending Heaven Pavilion, and she is now able to practice seven-grade magic weapons.

Mu Heng was also speechless when he heard this, sure enough, girls and boys have different concerns, am I talking about whether they look good or not? There are only twelve scales on this dial, which is the number of earthly branches. And then, and then there was no then.

And looking at the twelve characters of "Zi Chou Yin Mao" marked on it, it is obvious that it is written by feeling, and it can be seen with the naked eye that there is no equal division.

If you use this timer to do an experiment, the result will probably look like this:

It takes an hour to absorb the full water aura, an hour to absorb the fire aura, and an hour to absorb the wood aura.

Ni-Ma, what's the use of that? Can you make a difference?

"No matter how beautiful it is, it won't be useful." Mu Heng is still accustomed to the 12-hour timekeeping method on the earth. After thinking about it, he asked again: "Senior sister, can I change this compass?" ”

"Changes? Senior brother, do you still know how to refine weapons? ”

"Refinery? That's not very good, but it shouldn't be a big problem to adjust the local area. "It's just an order of magnitude smaller scale, and I don't understand the principle of its operation, so I can only do some superficial articles.

"Senior brother, you can change it as much as you want." Luo Yunjin also didn't believe that Mu Heng could refine weapons, so he shouldn't be able to destroy the compass, and with the cultivation of the first order of the Ten Directions Realm, it was impossible to destroy this compass.

According to the ancient unit of time on earth, an hour was two hours, an hour was divided into eight quarters, and a quarter was 15 minutes. Mu Heng pondered in his heart: "Let's take the carving as the smallest unit first." ”

The operation is also very simple, but it is to divide the scale corresponding to the current hour into eight equal parts. After thinking for a while, Mu Heng planned to make a simple compass first, and then get a ruler.

"Senior sister, lend me your fairy sword." Mu Heng plans to use bamboo to make these two things, the fiber direction of bamboo is conducive to strengthening the straightness of the ruler, is the preferred material for making rulers, and there are many dead bamboo poles in the bamboo forest behind the house, which is easy to find.

"Senior brother, here you go."

For the first time, Mu Heng carefully observed this sword, which was about 90 centimeters long, and belonged to the category of short swords. The width of the sword is about 3 cm, it is stainless steel, engraved with a flowing water sword pattern, the blade is not very sharp, and the fairy sword is not used as a magic weapon, not for slashing.

The lattice of the sword is trumpet-shaped, of fine wood, echoing the cloud-shaped pier, and the hilt is wrapped in a layer of animal leather of some kind.

It seems to be cold in his hand, and his index finger flicks the blade of the sword lightly, and the sound is crisp and orderly. Mu Heng listened to the tremolo frequency steady, and according to the general principle of sonic flaw detection, it was speculated that the material inside the sword body was uniform and basically had no flaws.

"Good sword." Mu Heng praised from the bottom of his heart.

Seeing Mu Heng playing with his immortal sword, and there was a sound of approval in his mouth, Luo Yunjin was happy in his heart, and echoed: "That's!" ”

Mu Heng held a bamboo pole as thick as a fist, took the longest bamboo tube in the middle, and used a sword to split the bamboo tube into the thickness of chopsticks. Continue to flatten two slender bamboo boards, drill a small hole at one end, and insert bamboo sticks to form a simple hinge.

At the other end of the two bamboo boards, a hole is split, and a pointed bamboo skewer is inserted on one side, and a sharpened charcoal is inserted on the other side, and a simple compass is ready.

Luo Yunjin sat on the side, watching Mu Heng's every move intently, a series of actions of splitting, cutting, and drilling, although the movements were simple, he couldn't understand them. However, the senior brother's focused expression did look a little handsome.

Looking at the finished product in Mu Heng's hand, Luo Yunjin didn't know what it was for. After Mu Heng drew a regular circle for her, she jumped up with joy, as if looking at a baby, looking at this thing called a compass.

Regardless of Luo Yunjin's excitement, Mu Heng began to make rulers again. The ruler is not difficult, and it can be directly corrected by using the principle of linear propagation of light.

Finally, it took Mu Heng a whole hour to get these two things done, and the reason why it took so long was that Mu Heng tried to be accurate. The greater the error of the ruler, the greater the impact on the subsequent drawing, and it cannot be ignored.

The next step is to scale the dial. Compare the diameter of the dial with a compass and draw a circle of the same size on paper. The circle is then divided into 24 equal parts by using a ruler, and each large scale is subdivided into 8 small scales.

Luo Yunjin looked at Mu Heng on such a small circle, dividing left and right, and the straight line drawn made her scalp tingle: "Senior brother, what is this drawing, so messy?" ”

"It's still messy, it couldn't be more neat." Mu Heng didn't care about Luo Yunjin's question, this kind of picture is not about the beauty and ugliness of the appearance, its beauty lies in the equal division.

Now that the scales are divided, the next step is to draw them against the dial. Mu Heng buckled the circle on the paper, leaving only the scale, and then used the remaining outer ring template to put it on the dial, and the corresponding black was done. The original Zi Chou Yin Mao didn't have much of a position offset anyway, so he didn't make adjustments.

After doing all this, Mu Heng was satisfied and returned the new chronograph compass to Luo Yunjin, and explained to her in detail the use of the new compass.

Luo Yunjin looked at the compass in his hand, originally there were only words on the scale, but now there are many vertical lines between the words, some long and some short, and they are not clear. But hearing Mu Heng's chanting explanation, it was like listening to a book from heaven, and it was in the clouds.

Finally, when Mu Heng spoke for the eighth time, Luo Yunjin broke out: "Ah... Yes.. Senior brother, don't read it, I don't understand, I won't. ”

Children who have not studied mathematics are so pitiful, no, children who have not studied mathematics are so happy. At this moment, Mu Heng suddenly had a new understanding of the impression of the girl in front of him: silly and sweet, a proper science idiot.

Mu Heng's mouth was dry, seeing that this stupid girl still didn't understand, she gave up the idea of teaching her, and smiled bitterly: "Forget it, when you help me time it tomorrow, just tell me the starting position." ”

Luo Yunjin took the pain of being tortured by mathematics, and without waiting for Mu Heng to send him off, he flew away in a hurry, and took the compass and ruler made by Mu Heng before leaving.

Mu Heng didn't care, anyway, the goal has been achieved, it doesn't matter if there is a ruler or not, and this thing is easy to make, so she should give her a small object to play with.

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When Mu Heng had already fallen into a deep sleep, a roar came out from the main peak of the Heavenly Pavilion not far away: "Who said that my timing compass is too rough?" ”

"Senior Sister Yang Lan, stop being angry, anyway, there is someone, and you don't know you when you say it." Luo Yunjin saw that Yang Lan was about to go crazy, and hurriedly persuaded him.

Leaving from Mu Heng, I wanted to go back to Xiulou to rest, but when I left, I was thinking about the fresh thing, something called a compass ruler, and a thought that made her happy came out, and she took it away, and went straight to the refining pavilion of Yuqing Xingzhai to mend the heavens.

"Senior Sister Yang Lan, look, that person drew a lot of vertical lines on the original chronograph compass, saying that it was a small scale." Luo Yunjin didn't understand Mu Heng's explanation at all, and he couldn't convey the connotation of this scale at this time, so he could only grasp a few key words.

"Oh?" Yang Lan took the chronograph compass angrily, and carefully observed the dense vertical lines with beautiful eyes, and Luo Yunjin heard the words of Luo Yunjin in his ears, what is three quarters in the afternoon, four quarters in the afternoon.

Although he couldn't understand Luo Yunjin's expression, the special words between the lines, as well as the evenly ordered lines on the dial, Yang Lan immediately understood the meaning of the existence of these vertical lines.

"I see, I see!" Yang Lan, who wanted to understand all this, flashed a glimmer of light in her eyes, and couldn't help but shout. Tie Qing's face also turned red under this uncontrollable excitement.

"Ah, senior sister, do you really understand?" Luo Yunjin saw Yang Lan's crazy and excited look, and asked with suspicion in surprise.

I listened to it eight times, but I didn't understand it. And she herself knew that she had told her senior sister what she had to say, to be honest, she didn't understand it herself, she just recalled Mu Heng's words at that time from memory.

"Well, I see. Regardless of the level of refining this person, with the idea of narrowing the scale, he can be called a refining master. "Yang Lan's attitude towards refining weapons is extremely strict, which is also the biggest reliance on her to be able to reach the seventh-grade refiner at this age.

I don't care if Yang Lan really understands it, but this master's praise from the mouth of the senior sister made Luo Yunjin's heart as sweet as eating honey, and his innocent face was filled with satisfied pride.

If Senior Brother knew that he was so highly regarded by the Seventh-Rank Refiner who never boasted about people, he must have been happy in his heart. Luo Yunjin smirked beside him, his mental activities were as exciting as playing a movie, the senior brother was a little monk of the first order of the ten directions, in the words of the senior brother, he was called Xiao Mengxin.

Yang Lan, who was still studying the scale over there, didn't pay attention to Luo Yunjin's smirk, and threw herself on this scale, and couldn't help but have many doubts in her heart: It's not difficult to draw such a small scale, but how to ensure that the painting is even?

I think that when I marked Zi Chou Yin Mao at the beginning, I wrote it based on feeling, but it looked symmetrical, but it was still not symmetrical and balanced enough on a closer look: if I could master this method, and the refining tools would be in accordance with the standards in the future, it would greatly improve the success rate of the refining tools.

Yang Lan quickly realized in her mind the role that this technique could play in refining, and although she still couldn't figure out how to operate it, it didn't prevent her from looking forward to the innovation of refining technology.