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Mercury, also known as "" in ancient times, is a liquid metal. Its white and metallic luster, flowing at room temperature, and unique properties.
In ancient times, mercury was mainly used in the following aspects:
First, the field of alchemy. In ancient alchemy, mercury was an extremely important raw material. Taoists believed that through complex refining processes, based on mercury and other substances, they could refine elixirs of immortality. For example, Ge Hong mentioned the use of mercury in alchemy formulas many times in his alchemy writings. They believed that mercury had magical properties, and after refining, it could prolong people's life, or even become immortals. Although there is no scientific basis for this concept from a modern scientific perspective, at that time, alchemists were convinced of it and devoted a lot of energy to studying the reaction and role of mercury in alchemy.
Second, medical use. Some ancient physicians believed that mercury and its compounds had certain medicinal value. For example, mercury ointment was recorded in some ancient medical books as being used to treat skin diseases such as scabies. However, due to the toxicity of mercury itself, improper use can easily lead to poisoning, so it is rather cautious in medical application. However, limited to the level of cognition at that time, the understanding of mercury toxicity is not comprehensive, sometimes leading to some adverse consequences.
Third, funeral customs. Mercury also has unique uses in funerals. The most typical example is the Mausoleum of Qin Shi Huang. According to the records of the "Historical Records", the underground palace "used mercury to instill hundreds of rivers, rivers and seas, and the opportunity phase". A large amount of mercury was used to simulate rivers, lakes and seas. On the one hand, it was to create a magnificent underground landscape to show the majesty and power of the emperor. On the other hand, mercury had a certain antiseptic effect, which could delay the decay rate of corpses and funeral objects. At the same time, its volatile mercury vapor could also play a role in preventing burglary tombs, poisoning those who entered the mausoleum rashly.

The sea and the river are both the largest of the water, and their physical properties are different.
The sea is vast and boundless, and there are many rivers of water. Seawater is salty and bitter, because it is rich in all kinds of salts, most of which are sodium chloride, because of its salty taste. Its density is larger than that of normal water, because the salt dissolves, resulting in an increase in the mass per unit volume. It is in seawater, which is easier to float than in fresh water. For example, in ancient times, when a boat sailed on the sea, it could float without sinking despite its load, which depends on the power of seawater density. And the temperature of seawater changes slowly. It is not hot in summer and cold in winter. Because the specific heat capacity of water is large, the absorption and release of heat are slow, which can adjust the coastal climate and make it cool in summer and warm in winter.
As for the river, the water is mostly gathered from mountain springs and streams, with a light taste and very little salt. The density of river water is close to that of fresh water, which is different from that of sea water. Its temperature is greatly affected by the outside world, and becomes obvious with the change of seasons. In summer, the water temperature rises when it is hot, and in winter, the water temperature decreases when it is cold. And the river water flows endlessly, with its specific flow direction, or eastward into the sea, or southward to turn north. The power of the current can carry sediment down, and it allusts downstream into fertile plains, which is beneficial to farmers and people's livelihood.
The tide of the sea rises and falls twice a day, which is caused by the attractive forces of the sun and the moon. When the tide is high, the sea water is surging, and when the tide is low, the water gradually recedes. This is a Although the river also has the fluctuation of water level, it is not like the law of tides, and the water volume increases and decreases due to factors such as rainfall and snowmelt.
In short, the sea and the river, because of their different environments and water sources, have their own physical properties. They have their own uses between heaven and earth, and are the basis for the survival and reproduction of all things.

The chemical properties of mercury powder are different. Mercury, which is a gold element, is usually liquid under Hg, and it is not bright, and it is not common. Its density is high, and it has a certain toxicity. The chemical properties of mercury are determined, but it can also be biochemically reacted with many substances. For example, mercury can be rapidly combined with sulfur to form mercury sulfide, which is often used to treat mercury leakage. Mercury is added in the air to the vicinity of the boiling, and it is oxidized to form mercury oxide. In addition, mercury can also be reacted with other elements to form mercury compounds.
And powder, which is the main form of polysaccharide compounds, is the main form of energy storage in plants. The chemical formula can be roughly expressed as (C H O), which is formed by the combination of polyglucose and water. Powder has special chemical properties. First, iodine will produce a unique color reaction, forming a color compound, which is often used in the presence of powder. Second, under the action of acids or enzymes, powder can generate hydrolysis reactions, gradually decomposing dextrins, oligosaccharides and up to glucose. In work, this property is often used to produce glucose and other products. In addition, powder can be used to synthesize some raw materials, generating powder ester derivatives with different properties, and expanding its application in many fields. In addition, mercury powder has some of the characteristics of gold and its opposite properties in terms of chemical properties, while polysaccharide compounds have their own unique anti-sugar properties.

If you want to make a water mound, you need to choose a tough stone, which should be dense and heavy in quality. Look for good materials first. If the shape is better than an oval, the size depends on what is needed.
Then use masonry tools to carefully carve. First use a rough chisel to remove its edges and corners to make it nearly round. Then use a fine chisel to grind its surface to make it smooth. Every chisel is based on the texture of the stone. Take advantage of the trend and do not go against it to avoid stone cracking.
When carving, you need to pay special attention to the uniform weight. If one side is too heavy, the mound will enter the water obliquely, and it will be difficult to go down vertically. Therefore, when carving, it is often measured by scale. If there is a slight imbalance, it will be fine-tuned.
When the shape is generally completed, drill a small hole in the center of the mound. The size of the hole is suitable for the rope. The drilling method can be used to use a pointed cone, hammering it, and slowly entering. The drilling hole must be straight and not skewed, so that the rope tie can be stable.
After the hole is completed, the whole body of the mound is finely ground with sandpaper to make it smooth and thorn-free. Then take a tough rope, pass through the small hole, and tie it firmly. At this point, the water mound is made, which can be used to measure the depth of water. When entering the water, the mound goes down vertically, and the depth of the water can be known depending on the degree of the rope entering the water. In this way, the water mound can be used.

Mercury is of a special and poisonous nature, and if it is hidden, it must be kept secret. If the device is not secret, the mercury will escape, and people will be injured. In the past, there were craftsmen who hid mercury in our devices. Not long ago, the mercury was scattered, and the room was human performers of virtual idols. They were all diseased, and their limbs were weak, and they were dizzy. This is the trouble of keeping the device secret. And where the mercury is, it is appropriate to be dry and avoid fire. Fire is hot, mercury is easy to burn, and its poison is even more severe.
It is difficult to hide it, especially careful. Mercury is flowing, and it is solid. If the package is not solid, the road will be bumpy, the mercury will overflow, and the pollution and other things will be damaged. One Mercury, due to the omission of the package, halfway through the journey, the mercury will be in the road, and the grass and trees in the place will wither, and people and animals will avoid it. Everyone suffers from it.
Those who channel water should not be used for its flow. If something enters the canal, the water will be damaged, and the people downstream will suffer from irrigation. The utensils of the canal water are also used for irrigation, and they will not be contaminated with new water. And the water should also be suitable for its nature, and should not be diverted. If it is not its nature, floods are easy to occur, and the fields and houses will be damaged, and the people will suffer unspeakably.
Hidden mercury and canal water are all about the well-being of people's livelihood, dense mercury, solid mercury, the protection of canal water, and the nature of canal water. In this way, it is safe to be safe.