"It was during the spring plowing time. I went home to help plow the fields, and I worked with my uncle, brother-in-law, and my sister-in-law barefoot. When we got home, we also washed the soil with our bare feet. Then I discovered
, when we stand side by side, the legs of the three of us are the longest, my sister is the longest, I am the second, and my uncle is the shortest. The same goes for the height, my sister is the tallest, a full eight feet, I am seven feet six inches tall, and my uncle is taller.
Seven feet three inches."
"At this time, I had a sudden idea. I found a Qin ruler to measure the length of my three feet, and wrote the numbers on the wooden board. After I returned to the pavilion, I tried to figure it out over and over again, but I couldn't figure it out. Until last month
, there was nothing too official in the pavilion, so in my spare time, I came to do some calculations and tried to divide the height of three people by the length of their feet. The result surprised me, and the numbers I got were surprisingly consistent!"
"Six and three-quarters! Gentlemen, this is the ratio of a person's height to his foot length that I calculated!"
Heifu slowly recounted his "experience" of discovering this matter, and his words were as conclusive as the truth.
In fact, this was just an elective course called "Footprint Studies" taught to him during his three-year undergraduate course at the police academy in his previous life. At any rate, he attended every class and did not return all the knowledge to the teacher...
When he explained this matter, the four of them, Xi, Nu, Le and An Pu, listened attentively. Heifu didn't have to worry that they didn't know what "divided by" and "fraction" were. If you really think so, it would be too much.
I underestimate the ancients.
The meticulous administration of laws and regulations of the Qin State required a large number of officials who were proficient in mathematics, so there were teachers in the school who specialized in teaching "Shu Shu". The minor officials in the Anlu County government, especially Cangcao and Hucao, basically knew how to do it.
Memorizing the Qin Dynasty version of the "nine-nine multiplication table" is just counting backwards from "nine-nine eighty-one". There is no way, who makes their daily job be to calculate various grains and household registration.
And these days, there are already rules for calculating fractions, including summation (fraction addition), subtraction (fraction subtraction), multiplication (fraction multiplication), reduction (fraction division), and even lesson points (comparing fractions)
, Bisection (finding the average of fractions), except that Arabic numerals are not used, is almost the same as in later generations.
After all, Li Si's junior fellow student, the great mathematician named "Zhang Cang", is now working in the Yushi Mansion in Xianyang of the Qin State. Although the Nine Chapters of Arithmetic was written in the Han Dynasty, it was actually born out of the Qin State.
Years of practical mathematics accumulation...
Since everyone present had some mathematical foundation, Heifu was not so tired when explaining. He put forward the number six and three-quarters in a concise and concise manner. The next thing to do was to verify whether this ratio was reliable.
Everyone was still hesitant. After all, although the Qin Dynasty Lingshi recorded the size of footprints when handling cases, most of them compared the size of the footprints after catching the criminal, but rarely used the footprints to arrest the criminal.
So Heifu smiled and said: "I have tried it on several people in Huyang Pavilion in the past few days. Without exception, their height and foot length were divided and they all got this number. If you have any doubts, why not
Try it too?"
"Okay, Chief Heifu, please use the length of my feet to calculate my height!"
Wei Shi Anpu was the first to stand up. He took a Qin ruler, took off his boots, measured his feet, and reported his foot size: "No more, no less, exactly one foot and one inch!"
Le was the best at numeracy among several people, so he used the arithmetic chips to calculate. The arithmetic chips are small sticks and are quite complicated to use.
Heifu saw that it was difficult for him to calculate, but he did not throw out "Arabic numerals" and "vertical arithmetic" rashly. He knew that it was far from the time to offer them.
The system of Qin is so special that it is different from previous dynasties. Those things from later generations are only worth dedicating if they can maximize their benefits...
It took a while before Le finally came up with the result: "Is Wei Shi's height seven feet four inches?"
An Pu was still a little unconvinced at first, but when he heard the result, he was slightly stunned: "It's almost the same!"
"Come try mine!"
As the commander of the order, Nu has been dealing with footprints for so many years, but this is the first time he learned that the height of the murderer can be inferred from the footprints, and he can't help but be very interested.
Soon, the heights of Nu and Le were calculated from the length of their feet, and they were indeed similar to their original heights.
"Although it's not exactly the same, it's still very close. Chief Heifu Pavilion, you've discovered another incredible skill in solving cases..."
Xi watched from the sidelines for a long time. While confirming Hei Fu's discovery, he couldn't help but sigh: "If this technique had been available a long time ago, then many of the cases I have handled over the years would have been solved faster and with fewer cases.
The most vicious thief managed to escape and committed another murder."
Now that Heifu's "footprint method" has been proven to be reliable, the next step is to call up the "Sealing Clinic" recorded by Sun Wrath to see the footprints left by the murderer.
At this time, An Pu also pointed out that although height can indeed be calculated based on foot length, will there be a deviation if shoes are worn?
Heifu looked at An Pu wearing deerskin boots for riding horses, and said with a smile: "Wei Shi, those criminals and thieves are not as good as officials. They can't wear good shoes, let alone boots, they can only wear hemp shoes."
."
It turns out that the shoes of this era mainly came in the form of xì, boots, and shoes. The xì was a wooden-soled shoe sewn with brocade embroidery, and was only worn by nobles who were not engaged in production. The boots were made of leather, and after the Warring States Period,
It became popular with Hufu riding and shooting, and was common among officials and horsemen.
Most of the soldiers in Guizhou still wear straw sandals and cloth shoes, commonly known as shoes. Since shoes are shoes that only cover the feet, the error between the shoe print and the foot length is relatively small.
The "Sealing Clinic" was quickly retrieved. According to the records of that day, the footprints were one foot and two inches long...
"According to the Qin system, one foot is equal to 23.1 centimeters. A thief can wear size 44 shoes. What a pair of big feet..." Hei Fu cursed.
On the other side, Le also calculated the thief's height and said in surprise: "I figured it out. After multiplying by six and three-quarters, the thief's height is about eight feet and one inch!"
"At 1.87 meters, even in later generations with better nutrition, he would still be called a burly man..."
When the truth came to light, Hei Fu could not help but whistle. Now it was easy to find him. There were no more than fifty people of this height in Anlu County!
The height of the Qin people is not shaped like the terracotta warriors and horses. They are all nearly 1.8 meters tall. Maybe that is the standard figure of the Guanzhong people?
Anyway, in Anlu County, Heifu found that his height of 1.75 meters was already considered outstanding. Most men in the county were under 1.7 meters. In rural areas, those with poor nutrition had even a height of only 1.6 meters.
It’s no wonder, after all, the Qin State’s adult standard is “six feet seven inches”, about 155 centimeters...
After calculating the height of the "murderer", Le was overjoyed. The long-standing mystery finally made a breakthrough.
Wei Shi Anpu was also gearing up, preparing to lead the county soldiers to search for a tall and tall person wearing a sword. Even if the person threw away the scabbard and the sword inside, it would be useless. With their methods, they would definitely be able to find a flaw.
He looked at Hei Fu angrily with more and more admiration. He even felt ashamed that he had been making history for so many years but was repeatedly proposed by Hei Fu. He subconsciously felt that whether it was to protect the scene or the footprint method, he should
Record it and report it to the county government and court officials, so that it becomes a routine, even a law, spread throughout the country!
Only Xi was very cautious. He took over Le's calculations, and after doing the calculations himself, he found that the number "eight feet and two inches" was correct. However, he was not happy but worried, and his brows furrowed even more tightly.
"In this case, there will be a new problem."
He stared at the crowd and said:
"How can a man who is eight feet two inches tall be so agile that he jumps into a window that is only three feet wide and commits murder?"
Heifu also discovered this flaw at this time, and suddenly broke out in a cold sweat, realizing that he had overlooked an important issue.
The footprints were very fresh and were indeed left on that day, but were they really left by the murderer?
If not, then why did the murderer climb up from the mud to the window and leave no traces of his own footprints even though his steps were strong?
Everyone felt as if a ladle of cold water had been poured on them. The excitement just now disappeared immediately, and they all frowned and began to think hard.
"There is another possibility."
Heifu thought quickly and blurted out: "We thought of this case too simply before."
