Future library

Baqing's gifts are specially selected, always divided into several sections, and placed in conspicuous places. When looking at the rise and fall of a noble family, one can get a glimpse of it from the selection of children.

The Cheng family is considered powerful in the southwest, but they are not as magnanimous as the nobles in the capital. The four items listed in the middle of the long room are nothing more than a colored inkstone, a "Translation and Annotation of the Four Classics", and a bottle of carved white jade lion. , a newly released yellow glaze and black colored bamboo pattern bottle.

Colored inkstones are expensive because of their materials, but the front is a very ordinary landscape relief. The "Translation and Annotation of the Four Classics" is a very good engraving. Speaking of it, the quality is better than most of the books Cheng Jinzhou has seen in modern times. If it is properly preserved, it will be no problem for a hundred or two hundred years. Unfortunately, the current one is newly published. of.

As for the jade lion-shaped bamboo vase, they are not considered rare. No matter which one of the four items is put up for sale, if you are not in a hurry, the price will be about one hundred and fifty taels, but in a pawn shop, it would be good to have 100 taels of silver.

For 100 taels of silver, you can buy four or five acres of not-so-good slope land, which is the entire property of a small family. Unfortunately, it fell into the hands of Cheng Jinzhou and only read 120,000 words.

Cheng Jinzhou looked around reluctantly.

Just when he was having trouble making a decision, a voice suddenly came from his ears: "I am Wu Zong..."

"Huh?" Cheng Jinzhou quickly looked to both sides, but there was no one around him.

Wu Zong seemed to have anticipated Cheng Jinzhou's actions, and said in a low voice: "I'm still outside, and I want to tell you that among Ba Qing's gifts, there is a star warlock's gift, which should be the most suitable for you. It depends on your opportunity. "

After saying that, there was no sound.

Astromancers still master many more interesting things than technology.

"The transmission of sound into the secret, or the transmission of sound from thousands of miles, should be a problem of the frequency of sound waves." Cheng Jinzhou gritted his teeth in envy, knowing that it was not that simple, but he still commented irresponsibly. No trace of scientific spirit.

Cheng Jinzhou murmured the word "chance" and unconsciously thought that it was very joyful to hear it coming from the mouth of a star warlock.

The four things in the middle of the long room were obviously not sent by the Star Warlock. Cheng Jinzhou moved his steps and went around to both sides. Even if it was just out of curiosity, he wanted to see what the Star Warlock gave him.

Based on Wu Zong's tone, the so-called Star Warlock must be a Star Warlock with a star rating. There are few things given by such a person that the Cheng family does not put into the treasury, and Cheng Jinzhou does not want to waste the opportunity.

If you think about it carefully, he might be one of the two star warlocks you saw during the sacrifice.

In a wealthy family, 100 taels of silver are common, but star warlocks are not common.

The items in the longhouse were roughly arranged in a ring. Cheng Jinzhou walked around from left to right, constantly filtering the items he saw in his mind.

The gold and silver utensils were not the same, the ceramic carvings were not the same, and the rare paintings were not the same. Cheng Jinzhou turned over the pages and suddenly stopped.

A scale?

Cheng Jinzhou wiped his eyebrows with his right hand, not sure whether the star warlocks of this era would use such a universal tool.

In the early days of science, astrophysics, mathematics, chemistry, and even biology were not separated. It is not surprising that Darwin's naturalist came from here. He was an astrologer with a long life and had various hobbies.

Cheng Jinzhou carefully took the scale off the cabinet that looked like a bookshelf, and at the same time took down the small boxes tied together.

This scale was obviously exposed on purpose.

The box was a simple buckle-type iron box, but it was strangely connected to the scale. The edge of the base was connected to the iron buckle. Cheng Jinzhou tried to open it in a normal way, but failed shamelessly.

"Isn't this going to be a puzzle?" Cheng Jinzhou muttered to himself, looking through the outer ring of the box. Cheng Jinhao was waiting outside anyway, and he was eager to make the other party more anxious.

The pallet balance is similar to the one used by Cheng Jinzhou in his previous life, with the standard accuracy error of 0.1 grams engraved in the center. Based on Cheng Jinzhou's more than a month's experience, the star warlocks' markings are basically the same as the world they are familiar with, and the common weights and measures save a lot of trouble.

The base of the balance is an uncommon rectangular shape, with a weight box attached to one side and numbers engraved on one side, respectively 3 and 4, with a downwards symbol in the middle.

And above the symbol is the center of the scale's dial.

Cheng Jinzhou curled his lips and said, "Star Warlock's solution to the puzzle."

…

If you see a rectangle and the numbers 3 and 4, what is the first thing that comes to your mind?

Some people may naturally answer: "5."

Mathematicians would naturally answer: "5."

But their reasons are definitely different.

In the eyes of ordinary people, 3, 4, and 5 are very normal natural number sequences. There is no difference at all between the answer "5" and the answer "2".

But in the eyes of mathematicians, 3, 4, and 5 are a series of strange and wonderful numbers - because it is the simplest Pythagorean number in mathematics, and it is the first step for humans to discover the Pythagorean theorem: the sum of the squares of 3 4 squared is equal to 5 squared. A rectangle with a width of 3 and a length of 4 has a diagonal length of 5!

This mysterious conclusion, which is called the Pythagoras theorem in the West and the Pythagorean theorem in the East, is the beginning of human mathematics. It can even be said that it is the first step in human mathematics.

And the three Pythagorean numbers 3, 4, and 5 are almost as magical as God. Its next set of Pythagorean numbers, whether it is 5, 12, 13, or the more beautiful 6, 8, 10, lacks the brightness from beginning to end. It is also more difficult to discover and understand. There is no doubt that if the first set of Pythagorean numbers were not so simple and dazzling that it is dazzling, the footprints of human civilization could be delayed by another 200 or 2000 years.

The status of the Pythagorean Theorem is also reflected in "Elements of Geometry". Mr. Ou also stands on the shoulders of Greek giants, one of whom is called Pythagoras.

In the eyes of Cheng Jinzhou, who re-researches "Elements of Geometry" all day long, star warlocks are mostly related to mathematics and physics. He easily opened the weight box connected to the scale and picked out two little guys marked 5.

First, I put a weight on the right pallet and looked at the iron buckle. It was still locked. When I put the second weight on the left pallet, two metal wires popped out of the rectangle on the bottom line without any warning.

One appears on the diagonal and one appears in the middle of the rectangle.

At this time, Cheng Jinzhou didn't know what was going on - it was a simple elementary mechanical lock - he immediately stretched out two fingers and roughly abused the metal wire on the diagonal.

Rubbing, twisting, and pulling, I don’t know which step it was, but the strong iron buckle popped open.

Cheng Jinzhou grinned twice and looked around with contempt. No one.

Inside the small box are a ruler with degrees engraved on it, a pointless compass, and a small nine-gong bead - a typical astrologer's calculation bag. Most astrologers use these utensils to perform calculations. Calculate the numerical position and manipulate the star array engraved on the body.

No wonder Wu Zong let himself take it. This is really the most valuable thing in the room. If a complicated "unlocking ceremony" is added, it seems to have some special meaning.

Not wanting to go out too early, Cheng Jinzhou took out the contents of the adjustment bag one by one, placed them on the table in the middle of the long room, and looked at them carefully.

Among the four items, the pallet balance is naturally the most valuable.

Cheng Jinzhou felt that this might be the most accurate balance in the entire Great Xia Dynasty.

Even under modern laboratory standards, a normal pallet balance can have an accuracy of 0.1 gram, which is considered good. If it is used frequently and not properly maintained, don't be surprised if there is an error of 0.5 gram or even 1 gram.

In Cheng Jinzhou's previous life, he had damaged countless balances with his own hands. The weights were inaccurate or the weights were not adjusted smoothly. He threw them directly to the public laboratory and picked up another pair. Anyway, in terms of experimental funds, a few sets of balances are nothing. .

But under the conditions of the Great Xia Dynasty, there were only two ways to obtain products with better accuracy - exceptionally good craftsmen, or astral warlocks who had mastered certain skills, both of which were not cheap.

The more backward the era, the more expensive high-precision products are.

In many cases, due to limited production volume, high-precision products are priceless and unmarketable.

Whether you are conducting experiments or producing chemicals on a small scale, scales are indispensable. Even without the temptation of the Star Warlock, Cheng Jinzhou still hopes to get this set of gadgets.

The accuracy of rulers and compasses is also very good. In the Great Xia Dynasty, a standard ruler with an error of less than 5% and a scale could be sold for more than 20 taels of silver. Compasses and scales were only a lot more, not to mention Jiugong abacus. Its production is far more complicated than an abacus.

I don’t know which star warlock sent me this strange gift.

Cheng Jinzhou couldn't help but fantasize about the life of star warlocks.

In such a backward era, the life of the Star Warlocks may be closest to the habits of modern people, but even with the wealth of the Cheng family, it is difficult for its children to get the guidance of a genuine Star Warlock.

As for the star warlocks who have no one to guide them, they are just wasting money and amusing themselves at best.

After spending more than an hour, Cheng Jinzhou finally put the device back into the box, closed the iron buckle, and hugged it hard.

This small box might make me different from other children in the family. Cheng Jinzhou secretly thought that even the flying Cheng family children he met on the school grounds after school that day only spent a lot of money to buy a set of star formations.

The star arrays used by true star warlocks are several orders of magnitude more practical.

"It depends on whether you can give me another set of super awesome star formations." Cheng Jinzhou walked out, stroking the box.

Outside the longhouse, the "charity-loving" father and son had long been impatient to wait. The young Cheng Jinhao glared at Cheng Jinzhou without concealing it and walked inward.

As for Cheng Bingshi, who was kind and charitable, he looked at the scale in Cheng Jinzhou's hand eagerly, his face half red and half white, looking like he was overworked. He tried his best to get nothing more than this set of equipment. He watched Cheng Jinzhou take it away, but in the end there was nothing he could do.

Cheng Jinzhou's eyes turned quickly and he looked around.

At this moment, meeting a certain great star warlock who left behind secrets is the top priority.

However, the Star Warlock did not appear for a long time.