When you know the sky, you know the place, you can see the image of the sky, and observe the movement of the five elements.

Weather forecasting is not produced in modern times, the ancient Qin Tianjian is dedicated to this work, there is also a division of duties, for example, the supervisor is in charge of the record and the migration of the scroll, the management of the "four seasons" is the five senses, spring, summer, mid-autumn and winter, a total of five people, they deduce the calendar, in charge of the four hours, in ancient times, the Yellow Emperor has two people to do this, Emperor Yao, it is Peng Zu who is engaged in it.

And when it came to Emperor Shun, Peng Zu stopped doing this job and became the director of the personnel department.

In addition, in the Qin Heavenly Prison, there are also astronomy, stargazing, divination, drinking the northwest wind, as well as the mage who grasps the time, the bell ringing, and the part-time rooster crowing......

Although Yu Zai is not an astronomy major, but the celestial phenomena are something that must be learned, geological exploration major, if you only know the geographical advantages and do not recognize the time, it is very dangerous in many places.

The weather in the uninhabited areas of Qinghai is not as mild as in the metropolis and coastal areas, the North China Plain.

Coming to the vicinity of the sundial, the Chifang clan has two sundials, the sundial of the public field is in the public field, and they didn't talk about it when they came, and they didn't see it, after all, they didn't move to the inside of the public field, and after seeing the big weather observatory under construction from a distance, they went directly to the farmers' market.

And the sundial of the Akakata clan, that is, near the ancestral land, is placed on an earthen platform, and many wind vane poles have been erected nearby.

Chick-shaped weather vanes, these bronze plaques, slow and lazy, swaying with the wind.

Underneath there are also large vats containing water, on which are hung wooden signs, all of which indicate the rainfall of various periods.

What Yu Zai wants to introduce to them is a strange "appliance" on the side of the wind direction pole, at the edge of the water tank group.

The apparatus is placed on a wide platform with the words "Rain Measuring Platform".

"This copper vessel is called a rain gauge, the upper circle is called the water bearing port, and this copper cylinder body is made of the divine copper mine near the Earth Jushi clan..."

Yijun has been built for a period of time, and the refining and casting of divine copper is more time-consuming, and it can only be cast well by continuous grinding, and some of them have the characteristics of "no wear", so they have to do the opposite, directly using the wind and fire in the furnace to crack it from the inside.

Just because you won't wear out doesn't mean you won't melt and crack.

The qi in the primordial copper ore is dispersed, and after it is cast into a weapon, it will circulate its own power according to the state of casting, so the primary copper, even if it is divine copper, is more fragile than the divine copper weapon that has been formed.

The original intention of casting is to expel impurities from minerals and build weapons with different characteristics according to the experience of the caster.

For example, in ancient times, the reason why the iron bar had to be hammered repeatedly was because when it was repeatedly beaten, it could eliminate impurities, unify its elemental composition and dense tissue, and sometimes refine its grains, thereby greatly improving the quality of the material, improving the toughness of the casting, and letting the oxide layer fall off, greatly increasing its strength and hardness.

The so-called 100 tempered into steel, this is what it means.

The rain gauge is a product of the Southern Song Dynasty, which was called "Tianchi Basin" at that time, and compared with the rain gauge of later generations, the Tianchi Basin is of course much simpler.

"When the rain falls, the rain does not splash out from the upper inlet funnel but flows all the way down, and slowly accumulates in the glass jar where the water is stored, until the rain stops ......"

"Take the amount of water accumulated in it, take it out and weigh it. ”

The earliest and weighing units in ancient China, as well as the era of use, began with Yi vessels and gongs and evens, but after these two units arrived in the Warring States period, they were directly wiped out by Comrade Qin Shi Huang with a wave of his hand, and only a part of the written records existed....

Weights and measures are too messy, uniform clams!

For the time and time, these two things were the dregs of history....

There is no way to find the "one-kilogram weight" now, this thing is in the international convention, covered in a cover, the definition of a kilogram comes from it, this weight is polished and formulated after a series of incomprehensible formula calculations, to let the cloud cloud a little....

Sorry, this was really sloppy, I chose to die.

Therefore, according to later generations, in modern society, one catty is equal to five hundred grams, Qin is two, three, five, five, and six, so .....

How many catties is 30 grams of water?

The answer is 0.06.

Yu Zai asked people to bring a thing, and it was something that no one in the world had ever seen.

A straight pole with two plates hanging at each end, connected by copper chains, while the whole utensil is also made of copper.

For some reason, when Yu Zai picked up this thing, the visitors here felt a "sense of sacredness" between heaven and earth.

"What is this?"

Chong Bo asked curiously, but he didn't notice the shocked gazes of a few Qi Refiners!

Yu Zai replied, "This is the fairest thing in the world, and it is also the thing that judges the righteousness of the world." ”

"During the period of the Yellow Emperor, there was this thing. ”

As a little expert in black technology, the Yellow Emperor appeared again, not bad! It is the ability of the arrow stack fruit again! The representative product of the weighing instrument, Libra, is said to have appeared in the period of the Yellow Emperor, and it was called "weighing" at that time.

At that time, the Yellow Emperor asked the head of the subordinate to set up five quantities of "weighing, fighting, ruler, step, and ten hundred", that is, creating weights and measures and the number of acres of land, and then after the death of the Yellow Emperor, this thing was broken, so his mother's was lost.

And there are written accounts in China, as well as a whole set of weighing instruments that have really been sung....

That's right, the improver (the real maker) and the first unifier of primitive weights and measures was Emperor Shun.

"Shangshu Shundian": "The language of weights and measures in the same law." ”

The main reason should be that when Comrade Yao Chonghua was doing business in Shouqiu, he was shorted for two pounds......

To sum up, the liar is the first driving force of historical development.

And now, Yu Zai is one step ahead and shows this scale, or "trade-off", in front of everyone's eyes again!

"Beimen Cheng, this is....!"

Wuzhuang didn't say anything dirty this time, but really lost his face, looking at Beimen Cheng, according to Liang was also shocked, the snail in his hand stretched out two tentacles, touched according to Liang's fingers, it didn't understand why its master was so surprised.

And Beimen Cheng said: "This is a trade-off!"

Yu Zai smiled: "It's more perfect than weighing, when the legend of the Yellow Emperor, there was this thing, but the effect was not good, and now, I have made a trade-off again....."

Beimen Chengdao: "When the Yellow Emperor was the first to make this thing, but at that time, because of some problems, it was finally discarded, because it was impossible to accurately measure the weight of the object..... What's the difference between your trade-off and the Yellow Emperor's trade-off?"

Yes, the most important thing about a scale is a standard.

This is not the same as the length, the size can be measured with the palm of the fingers, and at that time, Ji Li measured the water level, that is, with a few fingers and a few fingers.

Yu Zai touched his pocket.....

Please call Yu Zai Dora Dream.

Ten grains of rice, which are not too big or small, are placed at one end of the scale, and the scale, which was originally stable, begins to tilt slightly to one side.